Tag Archives: Respiratory Specimen Collections

COVID-19 Swab Test: What you should know

COVID-19 Swab Test: What You Should Know

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An abrupt COVID-19 has brought flocking swabs, nasopharyngeal swabs, oropharyngeal swabs, nucleic acids, antigens, PCR and also other extremely professional terms right into the public eye. Today, CellMedical will certainly offer you preferred scientific research: those aspects of Coronavirus (COVID-19) screening.

What is a flocking swab, nasopharyngeal swab, or oropharyngeal swab?

When nations are executing a new round of nucleic acid screening, a report is spreading out in circles. The basic concept is “the cotton bud used for sampling have reagents on them, which are hazardous”. Some netizens also left a message to the CellMedical firm backstage, saying that after seeing the pertinent reports, the elderly at home shared that they did not want to take part in nucleic acid testing, and also really hoped that the younger generation would additionally attempt not to undertake nucleic acid testing as well as antigen testing.

“The covid test swab is not the same as the cotton swabs used in daily life, but it does not contain reagents, nor is it toxic”. ( Click here to learn more )

What is a flocked swab and why choose flocked oropharyngeal and nasopharyngeal swabs?

A flocked swab is used because it is more suitable for sampling and testing. The flocking swab(learn more) is made of nylon fiber flocking technology, and the front end is coated with nylon short fibers fixed in a vertical manner, so that there is no absorption hole in the entire collection area of ​​the collection swab. In this way, the collected sample is not dispersed and retained in the fiber, which facilitates faster and more efficient elution. Relevant data show that CellMedical flocked swabs can elute more than 95% of the sample collection volume; traditional cotton swabs, especially those made of absorbent cotton, cannot completely collect and elute samples.

Enlarged view of flocked swab

Enlarged view of flocked swab

Nasopharyngeal swabs – which require a swab inserted into the nose to collect samples from the back of the nose and throat – are the gold standard for collecting samples for diagnosis. But the process is technically difficult, often uncomfortable for patients, and requires personal protective equipment that may be in short supply.

Oropharyngeal swab – the oropharyngeal swab is a method of collecting oropharyngeal specimens by entering the sampling swab through the mouth – compared with a nasopharyngeal swab, it is less difficult, more acceptable to the public, and more universal. 

What exactly is PCR nucleic acid detection?

PCR (Polymerase Domino Effect, polymerase chain reaction) innovation is a wonderful creation, without the creation of PCR modern technology, there would be no modern-day molecular biology. Nucleic acid detection modern technology has likewise entirely transformed several techniques such as genetics, medication, and also forensics, allowing human beings to accomplish significant steps such as hereditary testing, viral infection identification, and also genetic testing.

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Basically, PCR nucleic acid detection: To significantly magnify nucleic acid till it can be identified by equipment detection.  Yet if you increase the size of the nucleic acid, 1 ends up being 2, 2 comes to be 4, and also 4 ends up being 8. Consequently, PCR innovation is a method of amplifying nucleic acid.

After the covid-19 contaminates the human body, it will initially increase in the respiratory system. So it can be determined whether the body is infected by finding the viral nucleic acid in sputum and nasopharyngeal swabs. After a duration of infection, typically 7-10 days later, the body will certainly create specific antibodies versus the virus. IgM antibodies show up initially, adhered to by IgG antibodies. So immunological discovery approaches can identify these specific antibodies to identify whether the human body is carrying the virus.

Will the results from different nucleic acid testing institutions be consistent?

PCR nucleic acid detection has a strict standard procedure. It is the same SOP (Standard Operation Procedure). At the exact same time, all nucleic acid labs, regardless of dimension, must adhere to the same technological demands, and also the design and building of laboratories additionally have uniform specifications. Also, research laboratory screening staff have to go through standard technical training and also acquire a nationally identified task certification before they can work. It resembles KFC’s fried chicken all use the exact same dish. Whether it’s a fast window in the station, a sizable and comfortable dine-in in the town hall, or home delivery, you can constantly eat deep-fried chicken with the exact same preference, do not fret will certainly strike rumbling.

Therefore, no matter which institution we conduct nucleic acid testing, the outcomes need to coincide.

The collection of samplings from different components has different clinical importance. Along with the popular nasal swabs and throat swabs, sputum, blood as well as rectal swabs；

Nasal and throat swabs – upper respiratory tract specimens

Sputum – Lower Respiratory Tract Specimens ( Saliva Collection Kits )

Anal swab – digestive tract specimen

Blood – Antibody Test Specimen

What is the difference between nucleic acid testing and antibody testing?

The distinction between both is a positive nucleic acid shows the presence of viral nucleic acid in the sampling. Which suggests that the infected individual might be infectious. A favourable IgM antibody shows that the patient remains at the beginning of infection. IgG antibodies indicated that the patient had SARS-CoV-2. However, we were unable to determine whether it was transmissible. Compared with antibody detection, PCR nucleic acid discovery is much more sensitive and is additionally the “gold criterion” for laboratory detection.

Therefore, in recent cases, doctors discussed that the patient has symptoms of infection.

What factors may affect COVID-19 nucleic acid test results?

1. Viral load: In summary, when the viral lots are low. False negatives may occur.

2. The coronavirus may alter, which may further impact the accuracy of the test in the future.

3. Testing method: In the recently reported genuine tasting scene, several participants reported that the swab only revolved left and right in the mouth, and it really felt like it was only touching saliva.

However, did not reach the lingual and palatal arc, and the respondents did not have nausea and also reflexes. Sex-related security action, this type of tasting has a high possibility of not gathering exfoliated cells of the respiratory tract, so it is vulnerable to missed discovery, leading to false unfavourable results.

CellMedical VTM Kits Disposable Virus Sampling Tube Manufacturers

CellMedical VTM Kits Disposable Virus Sampling Tube Manufacturers

Cell medical (Dongguan) Co., Ltd., established in 2009, a swabs design/swabs manufacturer, has many years of experience in medical application moulding and flocking treatment heads and swabs. Our flocking swabs are famous for their stable and reliable performance and excellent absorption and elution ability.

We produce flocked swabs, VTM kits, and virus transport medium, with multiple automatic production lines(Including automatic VTM tube production line, OEM VTM Tube, Flocked Swab Production Line, etc).

Combined Throat And Nose Swab

Combined Throat And Nose Swab

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What is the difference between a nasal (Nose) swab and a throat swab for nucleic acid testing

The sampling method and location are different. The accuracy rates of the nucleic acid test ( PCR Test ) nasal swabs and throat swabs are usually similar, and the main difference lies in the sampling method and sampling site. For nasal swabs, nasopharyngeal swabs (flocking swabs) are mainly used to test the secretions from the inside of the nasal cavity and the surface of the nasal mucosa through the nasal cavity;

Throat swabs: Health care workers collect samples in the mouth with oropharyngeal swabs. Health care workers take throat samples for testing to determine whether a patient has the new coronavirus.

Are both throat swabs and nasal(Nose) swabs required?

Let’s talk about throat swabs first.
The “oral sampling” and “nasal sampling” mentioned above are actually test methods in which medical staff use medical swabs to collect samples from the pharynx in nucleic acid testing (PCR).

COVID-19: Will The Pandemic End in 2022?

It is very important to continue swab testing while the pandemic is still ongoing

Whether entering from the nasal cavity or the mouth, the specimens we need to collect are pharyngeal secretions, including sputum. Compared with the oral route, nasal sampling can provide better safety protection for the sampling person. Because oral sampling requires subjects to open their mouths wide, this increases the risk of virus transmission by droplets. However, if it is collected through the nasal cavity, the environment is relatively stable, and the medical staff who operate it will be safer.

What is the difference between a throat swab and a nasopharyngeal swab, which is more accurate?

The main difference between nasal swabs and throat swabs lies in the location and material of the specimens, which are usually as accurate. The throat swab is in the pharynx, and the nasal swab needs to go into the nasal cavity, not the external nasal cavity. It needs to use a longer swab and slowly rotate it to the deep part of the nasal cavity, so the parts of the material are different. Nasal swabs are special, and the material is relatively soft, which is convenient for reaching the deep nasal cavity through the nasal cavity. The process of taking it may take longer than that of throat swabs.

Compared with nasopharyngeal swabs, oropharyngeal swab sampling is sometimes difficult to meet the normative sampling requirements due to irritating reactions, and the actions of eating, drinking and swallowing will reduce the oropharyngeal to a certain extent. The virus enrichment of 2000 may affect the positive detection rate of oropharyngeal swabs.

Which is better, nasal(Nose) swab or throat swab?

No matter which one is adopted, the key lies in the depth of the collection, whether the collection is in place and the length of contact time with the deep mucosa. 

 From the personal experience of the testing population, throat swabs will be less irritating and uncomfortable than nasal swabs.

Flocked Sterile Swabs

Sterile Flocked Swab

Oropharyngeal swab

　　• The operation is relatively simple and less irritating, suitable for large-scale screening.

　　• The sampling staff will guide the subject to open the mouth, and then use a sterile long cotton swab to gently scrape the subject’s throat to collect secretions from both palatine arches, pharynx, and tonsils.

Nasopharyngeal swab

　　• The technical requirements are high, the human body does not feel very comfortable, and the accuracy is higher than that of oropharyngeal swabs. For key groups such as isolation points.

　　• The sampling staff will insert a long sterile cotton swab into the nostril of the subject, and reach the mucous membrane deep in the nasopharyngeal cavity, stay for a few seconds to soak the secretion, and then take it out.

Who is not suitable for nasal swab

What is A Covid-19 NP Swab?

What is A Covid-19 NP Swab?

When collecting nasal swab specimens, the flocked swab ( learn more ) will enter the nasal cavity.  

f the medical staff operates in a standardized manner, it will reduce the irritation to the mucous membranes.

But because we can’t see the sampling position of the pharynx.

It mainly relies on the hands of medical staff to feel the resistance, so the technical requirements of the operator are very high, and the tools used are also more complicated.
The improper operation will cause certain irritation to the nasal mucosa, so it is not recommended for patients with sinusitis and allergic rhinitis to do nasal swabs to avoid damage to the nasal cavity.

How to overcome the discomfort of throat swab

When collecting throat swab specimens, the oropharyngeal flocked swab will cause certain irritation to the pharynx. For some people with the sensitive pharynx, nausea and vomiting may occur.

Recommended to relax before collecting specimens.

Don’t get too nervous. If you feel discomfort in your throat after collection, you need to eat less spicy, irritating and greasy food, drink more water, eat more vegetables and fruits, and arrange rest appropriately. Generally speaking, it does not take long to return to normal.

Experts said that the study found that the nucleic acid-positive duration of feces or anal swabs of some infected people is longer than that of the upper respiratory tract. Increasing anal swab sampling can improve the detection rate and reduce missed diagnosis; but anal swab sampling is not convenient enough, and currently only for isolation. Points and other key groups to use.

 

Flocked Swab Influenza

Flocked Swab Influenza | Comprehensive Flu Swab Test Guide

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Flu Flocked Swab Influenza

Influenza refers to the common cold, which is an acute respiratory infectious disease caused by the influenza virus.

It is highly contagious and mainly spreads through droplets, such as coughing and sneezing. Influenza generally occurs in winter and spring.

The current influenza detection method is the rapid influenza antigen detection method, which detects “flux A” and “flu B” antigens.

Laboratory staff collect samples through throat swabs.

In fact, in inspection work, it is important to know the quality of the specimen in order to obtain accurate and reliable results.

Throat swab specimens: Professionals can avoid many false-negative influenza tests caused by improper specimen sampling.

The precautions for flu throat swabs are basically the same as those for nucleic acid detection throat swabs. Because the same part is sampled.

There are two types of flu throat swabs: nasopharyngeal swabs and oropharyngeal swabs.

What precautions should I take when taking a throat swab test for flu?

1. Oropharyngeal swab The collection method of the oropharyngeal swab is to let the subject open his mouth, then use a long pharyngeal swab to wipe the patient’s pharynx, bilateral frontal arches and tonsils, and take out the local secretions. Into the catheter of the throat swab and sent to the laboratory for testing.

2. Nasopharyngeal swabs The collection method of nasopharyngeal swabs is to use sterilized throat swabs to penetrate deep into the nasal cavity of the subject and reach the nasopharynx, and extract secretions and nasopharynx by rotating or wiping.

Epithelial cells put a section with secretions and epithelial cells into a sterile container and then carry out pathogenic detection.

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Flu swab material

Swab options for flu testing include flocked swabs, cotton-tipped swabs, rayon tipped swabs, and foam-tipped swabs.

Cotton tip swab:

The original swab tips were all cotton, mainly based on their cleaning power and water absorption. Cotton swabs are very inexpensive and readily available, and are widely used in medical wound management after sterilization with ethylene oxide or autoclaving, as well as in forensic crime scene forensics. In the absence of alternatives, cotton swabs can be used in almost a variety of scenarios.

However, cotton-tipped swabs also have some problems. Due to the low release rate of cotton, natural material for samples, and some of the natural fatty acids in it can damage microorganisms, they are less and less used for sample collection.

Rayon head swab:

Rayon—a synthetic fiber made from wood pulp. Although classified as synthetic fiber, it is essentially a natural material. Compared to cotton, rayon is produced during the process of removing substances that may damage the sample or react with the sample during transportation and handling , so it is generally used for sampling for diagnostic testing.

Polyester Fiber Tip Swabs:

The head material of the polyester fiber swab is made of polyester long fiber winding, which was first introduced into the field of medical testing by DuPont. Polyester fibres are proven for microbial collection, rapid diagnostics, and PCR testing.

Polyester swabs have a high release rate but are more expensive than cotton and rayon swabs.

Foam tip swab:

China Medical Nasal Foam Swab Factory And Manufacturers

China Medical Nasal Foam Swab Factory And Manufacturers

Swabs made from medical-grade polyurethane are an excellent material for diagnostics, especially cell sampling. The swab tip of this swab is usually manufactured as a sheet with a surface hole count of 100ppi (holes per inch).

This material has good absorption of hydrophilic substances and poor absorption of hydrophobic substances. Used in some scenarios that require resistance to chemical corrosion. Also used for DNA and microbial sampling.

Flocked Swabs:

Flocking technology was first developed for cosmetic and industrial production. (Learn more)

After the flocking process was introduced into swab production. It replaced the traditional swab head, and the swab head was brought to a new level.

vtm swab

Due to the flocking process and the multi-branched polyester fibre material used, the flocked swabs have a very high absorption and release rate and are proven to be equally efficient for molecular sampling and absorption. Designated by some institutions for nucleic acid sampling as well as some research areas for genomic analysis.

The evolution of swabs is not limited to changes in materials. New demands in the fields of nursing, testing, and scientific research make swabs continue to evolve in multiple dimensions. The swab also not only acts as an applicator, but also acts as some transport medium.

Precautions include the following:

① Do not drink water before the throat swab test, at least 30 minutes in advance, because drinking water before the test will dilute the virus attached to the pharynx, especially drinking hot water will inhibit the activity of the virus.

In order to improve the accuracy of throat swab nucleic acid detection, do not drink water 15 to 30 minutes before the test to ensure that the throat swab has high accuracy.

②. For patients with good throat exposure, it is not recommended to take too long “ah~” sounds to reduce the risk of occupational exposure to the sampler.

③ To prevent vomiting, do not eat within two hours before the throat swab test.

④. Do not smoke, drink, or chew gum within half an hour before the throat swab test.

During the throat flocked swab sampling, the patient may have clinical symptoms such as nausea or nasopharyngeal discomfort, but the symptoms can subside quickly, so the patient should not be nervous and cooperate actively during the examination. At the same time, the subjects should not smoke, drink, or chew gum within half an hour before the sample collection.

If it is because of the throat swab the child, the parents must soothe the child’s emotions, communicate with the child patiently, and try not to move the child’s head as much as possible.

Viral Transport Medium With Swab

Viral Transport Medium With Swab

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Viral transport medium with swab

The COVID-19 outbreak is expected to have a significant impact on the tedious market for swabs and virus transport media owing to the increasing patient demand for infection diagnosis.

Flocked Swab and viral transport media are expected to grow due to intensive testing of COVID-19 in research institutions and laboratories.

Rising research and development activities to produce COVID-19 vaccines are expected to drive market growth during the pandemic.

The rising number of COVID-19 cases in the global population is expected to drive market growth.

The need to develop vaccines and early diagnostics to treat infections is expected to boost the market growth.

Manufacturing of Viral Transport Medium

Virus sampling tubes are medical device products. The virus sampling tube consists of a sampling flocking swab, virus transport medium and outer packaging. Since there is no unified national standard or industry standard, the products of various manufacturers vary greatly.

CellMedical manufactures viral transport media (VTM) following WHO and CDC recommendations, with or without swabs.

Flocked swab+tube with Viral transport medium

Flocked swab+tube with Viral transport medium

1. Sampling swab:

Virus sample collection flocked swab

Virus sample collection flocked swab

The specimen collection swab directly contacts the sampling site, and the material of the sampling head is closely related to the subsequent detection.

　　Synthetic fibres such as PE synthetic fibers, polyester fibres, polypropylene fibers, and rayon fibres should be used for the manufacture of sampling swab tips.

　　(1) Natural fibers such as cotton are not recommended

　　Because the fiber of cotton has strong adsorption of protein, it is not easy to be eluted into the subsequent preservation solution;

　　(2) Nylon fibers are also not recommended

　　Because nylon fibers (similar to toothbrush heads) have poor water absorption, the sampling volume is insufficient and the detection rate is affected.

　(3) Do not use calcium alginate sponges or wooden stick swabs (including bamboo sticks) for the head of the sampling swab.

　　Because the broken wooden sticks or bamboo sticks containing calcium alginate and wooden components will also adsorb proteins after being soaked in the preservation solution, and even have an inhibitory effect on the subsequent PCR reaction.

Flocked swabs manufacturers

Flocked swabs manufacturers

Features of CellMedical Flocked Swabs:

1. Has extraordinary adsorption energy.

2. It has a release rate of more than 95% for the collected specimens, thus ensuring a high degree of reliability of the results;

3. There is a unique breakable design on the plastic rod, which is convenient for specimen transportation;

4. Sterilized by ethylene oxide or irradiation, individually packaged;

Nasopharyngeal and oropharyngeal swabs. learn more

 

2. Virus preservation solution (virus transport medium): There are mainly two kinds of virus preservation solutions widely used in the market, one is a virus maintenance solution improved based on the transport medium, and the other is an improved nucleic acid extraction lysate. Preservation solution.

3. Virus sampling tube: The material of the storage tube should be selected carefully. Some data suggest that polypropylene (Polypropylene) is related to the adsorption of nucleic acids, especially at high tension ion concentration, polyethylene plastic (Polyethylene) than polypropylene (Polypropylene) Easier to grab DNA/RNA. In addition, when using breakable swabs, the storage tube should try to choose a container with a height of more than 8 cm to prevent the contents from splashing and contaminating when the swab is broken.

What is Virus Sampling Tube

Virus Sampling Tube

4. Water for production of preservation solution: Ultrapure water used for the production of preservation solution should be filtered by an ultrafiltration membrane with a molecular weight of 13,000 to ensure the removal of biologically derived polymer impurities, such as RNase, DNase and endotoxin, and ordinary purification is not recommended. water or distilled water.

About the use of virus sampling tubes

Sampling using virus sampling tubes is mainly divided into oropharyngeal sampling and nasopharyngeal sampling:

1. Oropharyngeal swab sampling:

first press the tongue with a tongue depressor, then insert the head of the sampling swab into the throat to wipe the bilateral pharyngeal tonsils and posterior pharyngeal wall, and wipe the posterior pharyngeal wall with mild force, avoiding touching the tongue department.

2. Nasopharyngeal swab sampling:

measure the distance from the tip of the nose to the earlobe with a swab and mark it with your fingers, insert the sampling swab into the nasal cavity in the direction perpendicular to the nose (face), and the swab should be inserted at least half the length from the earlobe to the tip of the nose. Leave the swab in the nose for 15-30 seconds, swirl gently 3-5 times, and withdraw the swab.

It is not difficult to see from the method of use, whether it is an oropharyngeal swab or a nasopharyngeal swab, sampling is a technical task, which is difficult and easy to contaminate. The quality of the collected samples is directly related to the subsequent testing. If the viral load of the collected samples Low, easy to cause false negatives, difficult to diagnose.

Most of the samples recommended by the kits currently on the market are oropharyngeal swabs or nasopharyngeal swabs and bronchoalveolar lavage fluid. This can greatly reduce the difficulty of the samplers’ work. After all, it is not difficult to collect venous blood samples, and like the detection of hepatitis C RNA, about 5 ml of EDTA anticoagulated blood samples are separated into plasma, and the extracted and purified RNA can fully meet the needs of PCR detection.

Preservation solution features:

Our independent research and development and production, unique cell preservation technology, can be stored at room temperature for more than 3 years after sampling! No need to refrigerate, store and transport at room temperature.

Viral Transport Medium With Swab Factory

Viral Transport Medium With Swab Factory

By Type
Swab Type
Nasopharyngeal swab
Throat swab
Transmission medium
By Application
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influenza
herpes simplex virus
other
By end-user
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diagnostic laboratory
other
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North America
The U.S.
Canada
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The U.K.
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Rest of Europe
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China
Japan
India
Australia
South Korea
Rest of Asia Pacific
The Middle East and Africa
GCC
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Rest of the Middle East and Africa
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Rest of South America
Covid Swab Test To Your Baby

Covid Swab Test To Your Baby

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How To Properly Administer A Covid Swab Test To Your Baby

COVID-19 still plagues all parts of the world, and it will become more serious in spring, so there are still many people who need to do nucleic acid tests.

Do many parents have many questions about nucleic acid testing for children, especially babies, such as how to do nucleic acid testing for 10-month-old babies?

A little girl is being swab tested for nucleic acid

A little girl is being swab tested for nucleic acid

How do nucleic acid swabs test for children?

The nucleic acid test method for 10-month-old infants and adults is the same.

The method of throat swab is used. The throat is sampled.

When sampling, you only need to tilt your head slightly, open your mouth wide, and wait for the medical staff to use a flocked swab.

The swab stick can be sampled.

You may feel a little nauseous during sampling, but it is not particularly uncomfortable in general.

This kind of discomfort is acceptable to basic children, and the sampling process is relatively fast, so parents don’t need to worry too much.

Of course, it is not ruled out that some children do not cooperate. In this case, older children can communicate well, explain the situation, and parents can show the children how to carry out nucleic acid testing; if it is a child who is too young to communicate, then you have to grab it forcibly for sampling.

It should be noted that before going to the hospital for examination, you must make an appointment first, otherwise, it will be a waste of time.

Since different hospitals or testing centres generally have different methods for ordering nucleic acid testing.

It is important to understand the hospital nucleic acid testing process before officially performing nucleic acid testing.

In addition, it is not recommended to eat about two hours before the nucleic acid test.

If you are nauseous during the sampling, you may vomit or spit milk, but this is rare.

Baby swab tests

Baby swab tests

 

  • You bring your child’s safety to a stable place (a blanket on the floor, a changing table, another adult’s arms).
  • Consider wrapping them in a warm blanket to relax and prevent their elbows from helping you.
  • Show them a pacifier (make sure you can adjust their nostrils) if the pacifier will soothe them.

In general, bring the kids to a convenient place where you know them best.

As an adult helper, you can take the kids on their laps.

We recommend keeping your back against the patient’s reason and facing toward the person holding the flocked swab.

Then you can start!

 

The nucleic acid test method for children is the same as that for adults.

The throat swab is to extract the secretions of the respiratory tract for testing.

Because the baby has a problem with cooperation, it is best not to feed the child 2 hours before the nucleic acid test.

During the nucleic acid detection process, children may not cooperate.

If they have just finished eating food, they will vomit, which will affect the nucleic acid detection results.

Nucleic acid testing uses a long throat swab to smear on the back wall of the pharynx.

The medical staff are more skilled and will not cause much impact on the child.

Instructions for use, specimen collection

Note Sterile gloves, protective clothing and goggles should be worn when collecting and handling microbial specimens;

Open the peel bag and remove the flocked swab.

CellMedical Specimen Collection Swabs manufacturers

CellMedical Specimen Collection Swabs manufacturers

Determine the age of the child, the button clips are on the appropriate upper lube), make sure the swab is not too deep;
To collect samples, the observer (observer) should only be at the necessary distance.
Know the internal program processor of the laboratory. Or use a cotton swab to test the transport tube.
Send the sample to the lab for immediate testing.
In the laboratory, when taking clinical samples, wear protective gloves and protective equipment related to general precautions.
The conditions, timing, and volume of samples collected for clinical research are variables for obtaining reliable results. Follow recommended sample collection guidelines.
CellMedical swabs should only be used by personnel.

Swab Specimen Collection

Swab Specimen Collection

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A throat swab refers to the use of a sterile medical long flocked swab to dip a small number of secretions from the pharynx of the subject.

And then carry out the detection of respiratory viruses, bacteria and other pathogenic microorganisms.

The collection site of the throat swab is the pharynx and tonsils of the subject, and precautions should be taken when collecting.

Swab Specimen Collection details are as follows:

Swab Specimen Collection

Swab Specimen Collection

1. Drinking water before the oropharyngeal test strip will dilute the virus attached to the pharynx, especially drinking hot water will inhibit the activity of the virus.

In order to improve the accuracy of the nucleic acid detection of throat swabs, required 15-30 minutes before the test. Do not drink water to ensure the high accuracy of throat swab nucleic acid detection;

2. We do not recommend that patients with well-exposed larynx keep hair in order to reduce the occupational exposure risk of the sampler;

3. To prevent vomiting, avoid eating two hours before collecting throat swab specimens;

4. Do not smoke, drink, or chew gum half an hour before sample collection.

In addition, the basic steps of throat swab collection are:

1. Ask the patient to sit down, tilt their head back, open their mouth wide, and take out the surface secretions in the nasal cavity;

2. The sampler fixes the tongue with a tongue depressor, and uses a cotton swab to cross the base of the tongue to the posterior pharyngeal wall and the lateral wall of the tonsillar recess, etc.;

3. Wipe 3-5 times repeatedly to collect mucosal cells;

4. Gently remove the test strip, avoid touching the tongue, uvula, oral mucosa and saliva;

5. Insert the test strip back into the sampling device or a suitable transfer device.

There are various Specimen Collection swabs available on the market.

Which one is the best one to choose?

CellMedical recommends “synthetic flocked swabs“.

Compared with traditional wound swabs (although they are also made of synthetic fibres), the amount of samples collected and released by this swab is 3 times higher, and it does not damage the cell samples, which can ensure the survival rate of the cell samples and has no fatty acid residues. Contains substances that inactivate certain viruses and inhibit PCR detection.

Nasal Gene Sampling Flocked Swab Oral Gene Sampling Flocked Swab

Although the positive rate of the new coronavirus RNA test is directly related to the quality of the reagent itself, the quality control of the whole process is more critical, which includes sample collection, transportation, storage, testing and all consumables used for testing. As long as one step is not well controlled, it is difficult to achieve the quality (detection rate) of the reagent itself.

What’s The Difference Between COVID-19 Rapid and PCR Tests?

What’s The Difference Between COVID-19 Rapid and PCR Tests?

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What’s The Difference Between COVID-19 Rapid and PCR Tests?

As New Year’s Day approaches, the number of new crown infections is also rising. Therefore, once you have symptoms of infection. Or you are exposed to the new coronavirus. If you are going to an environment with a high risk of infection.

You must continue to be tested.

Currently two COVID-19 detection methods-polymerase chain reaction (PCR) test (also known as reverse transcription-polymerase chain reaction test) and a rapid antigen test.

So, which detection method should we choose? What is the difference between the two?

On the COVID-19 website, terms such as PCR, rapid test, and antibody test are difficult to understand and which one is correct for you. In this article, our goal is to explain the difference between the two most common tests for diagnosing COVID-19: rapid antigen test and polymerase chain reaction (PCR) test.

Rapid antigen test

Antigen test (often called rapid test). This test detects protein fragments specific to coronavirus. We can do the antigen test in a clinic, doctor’s office or hospital. The turnaround time for results is usually very fast, and in some cases, we can get report results within 15 minutes. There are usually false negatives (the results indicate that the patient does not actually have a coronavirus) or false positives (the results indicate that the patient does not actually have the coronavirus).

If you feel unwell and have undergone a rapid negative test, you may need to undergo a PCR test for further confirmation. However, when someone is at the peak of infection, rapid antigen testing usually provides accurate results because this is when the virus levels in the body are highest.

The rapid antigen test is usually used as a screening tool to detect that you may be infected with the new crown, but PCR monitoring is required to confirm the final result.

Although a negative rapid antigen test result does not necessarily mean that you are not infected, it at least protects your contacts than not testing at all.

PCR TEST

PCR swab tests are similar to rapid tests in several respects because they can be used in symptomatic or asymptomatic patients and can be tested with nasopharyngeal swabs.

The swab test is considered the “gold standard” for SARS-CoV-2 detection. This test actually detects RNA (or genetic material) unique to the virus, and it can detect the virus within a few days of infection, even for those who have no symptoms. This test can be performed in a clinic, hospital or even in your car. The turnaround time is longer, generally in the range of 2-3 days, but the result may be within 24 hours. When the demand is high, the result may take a week or more.

What if the rapid test is negative but there are still symptoms?

The current recommendation is that if you still have symptoms and the rapid test is negative, you should have a confirmation test (PCR test). This is especially true if you have high-risk exposures. High-risk exposure is considered to be contacted with a COVID-19 positive individual for more than 15 minutes within 24 hours, and the distance between you and the individual is no more than 6 feet.

What kind of test should be done? When will it be done?

RT-PCR (reverse transcriptase-polymerase chain reaction) detection if the following situations occur:

1. Symptoms of new crown infection appear.
2. Having contact with people infected with the new crown.
3. The rapid antigen test result is positive, and PCR identification is required.
4. The Ministry of Health requires testing before lifting the quarantine.
5. The Ministry of Health requires that an inspection must be carried out before obtaining permission to travel to a certain area.

If you want a quick antigen test:

1. Have a plan to go to a place with a high risk of infection.

2. Contact with high-risk groups (such as the elderly) and hope to protect them.
3. You have symptoms of COVID-19, but you cannot go to the PCR test site.
4. Activities with a large number of participants in the field, if indoor activities are carried out, the risk of infection is greater.
5. Check whether you have the SARS-CoV-2 virus as soon as possible.
6. Participate in regular COVID monitoring projects.

Cell medical (Dongguan) Co., Ltd., a professional VTM kits and swabs manufacturer, disposable swab tubes exporter. We have many years of experience in medical application molding and flocking treatment heads and swabs. Our flocked swabs are famous for their stable and reliable performance and excellent absorption and elution ability.Certificate:FDA,CE,EU,Free Sale,Export license based on (GMP).

CONTACT US

Email:flockedswabs@gmail.com

    Covid Rapid Test Kit

    Covid Rapid Test Kit

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    Covid Rapid Test Kit

    Good news, recently, Health Canada approved covid-19 rapid test equipment. From now on, this equipment can be used for virus testing all over Canada, and the results can be obtained in 15 minutes at the fastest!

    The number of outbreaks in Canada has soared, and the pressure of virus testing has also soared! Ontario and other places once had to queue up for more than 4 hours to wait for virus testing.

    This will help alleviate the increasing number of confirmed cases and the need for virus testing. Best of all, the rapid test device can be managed by trained professionals in pharmacies and other places, without having to test the results through the laboratory.

    About Antigen self test kit.

    Antigen self test kit sampling process-Covid Rapid Test Kit

    Antigen self test kit sampling process-Covid Rapid Test Kit

    At present, most covid virus tests in Canada are carried out in public health clinics, and then the samples are sent to the laboratory for analysis.

    This process may take several days.

    Bcause some cities are facing the situation that testing centers queue up for hours.

    How much do you know about COVID-19 antigen detection technology?

    In late spring and summer of 2020, the COVID-19 epidemic was initially resurgent beyond all expectations, and unexpectedly came back with a strong attitude.

    “COVID-19” On August 26, 2020, in order to control the spread of the epidemic.Abbottswab.

    In addition, the federal government will spend $760 million to buy 150 million copies of reagents and transport them to nursing homes and schools in about a month.

    Antigen detection.

    By the end of October 2020, with more similar tests under way and waiting for emergency approval.

    Three more antigen test kits have obtained the emergency use authorization (EUA) of the US Food and Drug Administration (US FDA), and the total number has reached 7.

    In addition, although the World Health Organization was unwilling to do so at first.

    It also approved the use of two antigen detection kits following the emergency authorization of the U.S. Food and Drug Administration in September and October 2020.

    In the invention and transformation caused by covid-19 pandemic, detection technology has become a hot spot of biotechnology and engineering innovation.

    In addition, more extensive measures such as wearing masks, maintaining social distance, isolating and tracking contacts.

    And faster and cheaper screening tests provided by Cell medical provide hope for people’s urgent need to combat this infectious disease and make progress.

    Many places in the world that seemed to have controlled the epidemic in the early stage broke out again.

    Which shocked public health experts and called on everyone to carry out rapid and frequent testing.

    Covid 19 self test rapid antigen test.

    According to a report recently released by the Rockefeller Foundation.

    If only to meet the testing needs of primary and secondary schools and nursing homes.

    The United States should complete 200 million rapid tests per month by January 2021.

    Although people tend to detect with higher accuracy, antigen detection with accuracy of only 70% .

    People can also find infected persons omitted from previous tests through frequent detection. And provide sufficient accuracy for continuous screening.

    According to Mara g. Aspinall, a practical professor and medical diagnostic expert at Arizona State University (ASU) in Tempe.

    The co-author of the report, the number of tests required to screen the entire U.S. population may be twice that required by schools.

    “Now it’s time,” Aspinall said. “We have an agreement and testing reagents. I hope the community can reduce the spread of the virus and control the epidemic again.”

     

     

    Flocked Swab China Manufacturer

    Flocked Swab China Manufacturer

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    Flocked Swab China Manufacturer

    In the face of COVID-19’s repeated, it is the priority among priorities to do a good job in virus detection.

    CM’s production of millions of sampling swabs helps epidemic control

     

    Cell medical (Dongguan) Co., Ltd.

    Cell medical (Dongguan) Co., Ltd. specializes in the production of sterile sampling swabs, flocked swabs (flocked swabs or flocking sticks), throat swabs, virus sampling tubes, microbiological sampling sticks, DNA oral swabs, Dacron swab, Saliva collector or saliva collection device, cell preservation fluid, virus transport medium.

    Our company’s flocked technology has been certified by relevant medical institutions, and the daily output can reach hundreds of thousands of pieces. It effectively cooperates with customers’ orders and delivery, and provides complete flocking swabs and applicator after-sales service more quickly!

    Flocked Tapered Swab Medical Sterile Test Meaning Stick Vtm kits

    Flocked Tapered Swab Medical Sterile Test Meaning Stick Vtm kits

    Our flocked sampling swab adopts patented nylon fibre flocking filling technology. It is specially designed for collecting oral cells, saliva, semen, blood spots, dandruff and other materials at the crime scene. Its unique nylon brush head is especially suitable for the collection and extraction of trace DNA (exfoliated cells).

    The main users of cluster sampling swabs clearly point to the DNA laboratory personnel of the public security organ and the field investigators of the grass-roots public security system. On-site DNA extraction has become an important means for public security organs to deal with all kinds of cases.

    The effect of flocking cotton swabs on DNA exposure detection rate was significantly better than that of a traditional cotton swab. Now it is widely used in medical treatment, investigation, public security, chemical industry and other fields!

    We provide multi-plant cashmere swabs and sampling swab solutions:

    Gynecological flocking sampling swab.
    DNA and virus gene extraction sampling swab.
    Oral, nasopharyngeal flocking sampling swab, animal sampling swab.

     

     

     

    Vtm Swab | Virus Transport Medium with Sampling Swab

    Vtm Swab | Virus Transport Medium with Sampling Swab

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    Vtm Swab | Virus Transport Medium with Sampling Swab

    Description:Vtm Swab :for collection of COVID-19, influenza virus, hand foot mouth, measles rubella, norovirus, rotavirus and related samples.

    And stored at normal temperature for short time and transportation, and long time storage in -70 C refrigerator or liquid nitrogen environment.

    What is the difference between the liquid in your virus transport medium (VTM) and the virus sampling tubes of other manufacturers?

    A: we use the universal transport medium recommended by China Influenza Center and who.

    The Upgraded from Hank’s solution, adding a variety of components such as HEPES, amino acids, glycerol and so on, which has better performance than Hank’s solution

    The ability to maintain virus integrity.

    The positive rate of PCR detection and virus isolation was higher than that of traditional Hank’s solution.

    Vtm Swab | Virus Transport Medium with Sampling Swab

    Vtm Swab | Virus Transport Medium with Sampling Swab

    We made a comparative experiment according to the effects of temperature and storage time on the preservation of virus.

    The experimental results are as follows: the virus can be isolated within 48 hours when the virus is preserved with cell medical virus preservation solution at 2-8 ℃ or room temperature.

    Principle of virus collection and precipitation with flocking swab?

    The unique structure of the top of the flocking swab can almost completely extract and precipitate a small amount of DNA. Therefore, the flocking swab has more obvious advantages in micro DNA collection.

    (1) Sample collection effect is good:

    (1)Through the directional wiping effect of brush fiber layer.

    (2) More than 95% sample release rate,near surface of the brush fiber is conducive to collecting samples.

    (3) The capillary movement between the nylon fibers at the top of the flocking swab forms a strong hydraulic pressure. To absorb liquid or cell samples.

    terile Nylon Flocked Nasopharyngeal Swab

    Sterile Nylon Flocked Nasopharyngeal Swab

    We not only undertake the task of collecting samples from patients, but also collect avian influenza viruses in the external environment. What kind of sampling tube should we choose?

    A: Our conventional products of virus transport media, with a liquid volume of 3.5ml.

    To collect virus samples from clinical patients;

    If you collect and transport avian influenza virus in the external environment for a short time.

    We recommend that you use a virus transport medium with a liquid volume of 5ml or 6ml.

    (the liquid volume can be customized).