Microbiology specimen swab collection sterile Polyester Swab Rayon swab
Rayon is a processed form of cellulose and has been found to be particularly suitable for the recovery of microorganisms. The texture is close to that of cotton, but it has none of the fatty acids or other substances that can be inhibitory to fastidious bacteria. It has also been shown to be compatible with many molecular-based diagnostic tests. Rayon buds are used on most of our transport swabs.
Medical disposable products rayon swab
About Our Company
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).
Rayon-tipped swabs are designed for a wide range of unique applications, including specimen collection, testing and medical applications.
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Specimen Sampling Collection
Ideal for diagnostic specimen collection and DNA testing. Made from finest USP grade rayon fiber. Rayon offers the texture of cotton, but none of the fatty acids that can be inhibitory to fastidious bacteria.
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Sterile Regular Tip Rayon Swab and Transport Tube
Dry Transport Tube for safe transport to the lab!
Just take sample and insert into the dry transport tube and transport to the lab. Virtually eliminates contamination.
Rayon Tipped Swabs Much like cotton, rayon tipped swabs are predictably soft and absorbent and an economical choice for many applications where cotton would not be suitable.
Sampling for COVID-19 Testing: Introduction to Nasal Swabs, Pharyngeal Swabs, Nasopharyngeal Swabs
1. Material introduction:
1. Flocked swab: It is made of nylon fibre crowding modern technology, and also the front end is coated with nylon brief fibres repaired in a vertical manner so that there is no absorption hole in the whole tasting area of the tasting swab. As well as the sampling example, will certainly not be scattered as well as preserved in the fibers. Which promotes much faster and also a lot more efficient elution. Traditional cotton swabs can not entirely collect and also elute samples, while flocked swabs can elute 95% of examples. widely used.
Flocked Respiratory Collection Iclean Nylon Tip Swab Test
2. Cotton Swab: The cotton bud is made from sterilized cotton wrapped around a wooden stick or a plastic pole. Because the all-natural product of cotton has a reduced release rate to the example, and also several of the natural fatty acids in it will harm microbes, the, even more, are much less as well as much less used for sample collection.
3. Rayon Head Swab: Rayon is a synthetic fiber made from wood pulp. Although categorized as an artificial fibre, it is basically a natural material. It is often the standard for diagnostic testing.
4. Polyester Fibre Head Swab: The head product of the polyester fiber swab is made from polyester long fiber winding, which was very first presented in the field of medical screening by DuPont. Polyester fibres for microbial collection, rapid diagnostics, and also PCR screening. Swabs have a high launch price yet are extra expensive than cotton and also rayon swabs.
5. Foam Tip Swabs: Swabs made of medical quality polyurethane are superb materials for diagnosis, especially for cell sampling. This product has great absorption of hydrophilic substances and inadequate absorption of hydrophobic compounds. For some circumstances that need resistance to chemical rust, and also for DNA as well as microbial testing.
Ordinary people can operate it. The new crown self-test products on the market generally use nasal swabs, and Foam Tip fibre heads are the first choice.
Throat swab: Professional operation is required, because the throat is more prone to injury, flocking swabs are the first choice.
Professionals must operate it, and it needs to be very careful from the nose to the throat. Generally, Westerners are easier to accept, while Orientals are less acceptable.
Cell medical (Dongguan) Co., Ltd. Flocking sampling Medical Swab manufacturers can be customized according to customer needs.
Cell medical (Dongguan) Co., Ltd. is a comprehensive high-tech medical consumables company and an OEM factory for flocking swabs. We support customized production, our swab OEM factory produces flocking swabs, throat swabs, nasal swabs, oral swabs, sponge swabs, virus sampling tubes, virus transport media, and sample preservation solutions. Our GMP factory was built in 2016, and the factory has an ISO13485 quality management system, CE, FDA and other qualifications.
ABOUT VTM kits and swabs manufacturer
We support ODM and OEM
Our factory has a number of automated production lines. We support customized production, OEM, ODM, etc., and jointly develop and design products with customers. Willing to challenge all kinds of harsh swabs.
Customization of flocking swabs, customization of VTM kits, customization of a virus transfer medium, customization of virus collection and transfer kits, customization of disposable virus sampling tubes, customization of nasopharyngeal swabs, customization of oropharyngeal swabs, etc.
Welcome to the factory for consultation, we will serve customers wholeheartedly and develop high-quality flocked Medical swabs together with customers.
Features of our flocked swabs
Covid Swab Test flocked swab
1. The flocked swab is made of nylon fibre flocking technology, and the sample collection and release amount is as high as 95%;
2. Nylon nails are fixed vertically, the elution speed is faster and the efficiency is higher;
3. Single independent packaging to avoid pollution.
4. Strict process conditions, DNase free and amplifiable human DNA.
5. The tube body is transparent and the inspection material is visible.
6. The unique patented shell design ensures air circulation in the shell and prevents the detection material from becoming mouldy due to the humidity of the sealing environment. It avoids magazine pollution in the outside air and affects the detection quality.
Advantages of our flocked swabs
1. Especially designed for virus sampling and DNA micro-samples. Especially for trace samples such as sweat, semen, blood, dandruff, oral cells, etc., it has excellent collection performance.
2. It can quickly adsorb trace samples and release a high aging rate.
3. Flocked swabs become ideal for PCR work.
4. The front end is more precise and is suitable for cell extraction in the nails of victims or suspects.
5. The unique flocked swab breakpoint design is beneficial to the automatic extraction workstation for sample extraction.
6. Packaged in a clear plastic tube to avoid biological contamination.
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).
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.
• 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.
• 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?
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 swabs are widely used in Covid Test bacteriological sample processing, virological cell culture, DFA testing, rapid and direct testing, enzyme immunoassay testing, polymerase chain reaction and molecular diagnostic-based tests, and forensic identification. Both are ideal.
For throat sampling of respiratory viruses such as influenza, swine flu, bird flu, hand, foot and mouth.
Vtm Kits are used for the collection, transportation and storage of influenza, avian influenza, coronavirus and other virus samples for subsequent extraction and PCR amplification.
After samplers collect virus samples, they usually do not conduct PCR testing at the sample collection site in time.
So the collected virus flocking swab samples need to be transported. The virus itself will rapidly decompose in vitro, affecting subsequent detection. During transport, we need to add a virus preservation solution (virus transport medium).
For different detection purposes, we need to use different virus preservation solutions.
At present, it mainly includes inactivated type and non-inactivated type. In order to meet different detection requirements and different laboratory conditions for virus detection, it is very necessary to use different preservation solutions.
Why flocked swabs are more beneficial for micro DNA collection.
1. The top of the traditional cotton swab, may even lead to false-negative results of the test.
2. The top of the flocking swab has a unique structure, which can almost completely extract and separate trace DNA, so the flocking swab has more obvious advantages in collecting trace DNA.
Made of non-inhibitory DNA amplification materials. It has been verified that it can be directly amplified by PCR, eliminating the need for extraction steps.
At present, it mainly includes two types: inactivated and non-inactivated.
Flocked Swab With Vtm Kits Leading China Manufacturer
Inactivated preservation solution:
It can lyse and inactivate the virus in the sample so that the virus loses its infectious activity.
It can effectively prevent the secondary infection of operators.
But it also contains inhibitors, which can protect the viral nucleic acid from degradation.
Therefore, the experimenter can perform follow-up detection by NT-PCR.
Stored at room temperature for a long time, saving the storage and transportation costs of virus samples.
Non-inactivated preservation solution:
The non-inactivated preservation solution of the present invention can maintain the in vitro activity of the virus and the integrity of the antigen and nucleic acid, protect the viral protein shell, and maintain the originality of the virus sample to a large extent.
Not only for nucleic acid extraction and detection (PCR test) but also for virus culture and isolation.
The CellMedical virus sampling tube has a thickened and leak-proof design to ensure that the sample does not leak during transportation. It is a virus transport medium (VTM KITS) that complies with WHO regulations and biosafety regulations.
Cell medical (Dongguan) Co., Ltd. is a Class II medical device manufacturer integrating R&D, production, sales and service.
The company is committed to providing cells, Virus, Microorganism Collection & Storage & Shipping Solutions.
Cell medical (Dongguan) Co., Ltd. was established in 2009, the company is located in Chang’an, Dongguan.
We mainly produce flocked sampling swabs, sponge sampling swabs, preservation transport media, virus sampling tubes and saliva collectors.
VTM Kit, Viral Transport Media manufacturers, suppliers & exporters in china. Vtm SWAB collection kit compatible with its PCR test
To provide cell, virus, microbial sample collection, storage and transportation solutions for life sciences. Forensic identification, CDC, in vitro diagnostics and medical testing.
After more than 10 years of unremitting efforts and the pursuit of excellence in quality,
Today, CellMedical has become a Class II medical device manufacturer integrating R&D, production, sales and service.
Medical care means high technology and rigour. We always adhere to the concept of “survive by quality and develop by innovation”.
The company has an 8,000-square-meter workshop, a 3,500-square-meter GMP workshop and a 600-square-meter laboratory.
The sterile sampling swabs we produce have a high collection volume and release volume, which greatly enhances the accuracy of the inspection;
Well received by domestic and foreign customers. The company has passed ISO 13485 quality system, and flocking and sponge swabs have product registration certificates, CE and FDA certifications.
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.
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
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.
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.
As of April 30, local time, the number of new coronavirus patients in the United States has reached 81.2 million, and the number of deaths due to new coronavirus infection has exceeded 992,000.
As the government ramps up testing for Covid-19, many of us ordinary people are now being tested for Covid-19.
What is Deep Nasal Swab?
Deep Nasal Swab ( nasopharyngeal swab ) is actually a relatively long collection swab, similar to a relatively long sterile swab.
Its main function is to take nasopharyngeal secretions for bacterial culture and drug sensitivity tests.
The source of infection in the nasopharynx and the microorganisms in the nasopharynx were selected and identified by bacterial culture and drug sensitivity test.
Then a drug susceptibility test can be done to determine which drugs are sensitive so that sensitive drugs can be selected for treatment.
So that a better curative effect can be achieved, so the nasopharyngeal swab is actually a flocking swab for collecting nasopharyngeal samples.
China Sterile Flocked Nasopharyngeal Swab GMP Factory and Manufacturers.
Why deep nasal swab for covid?
The Deep Nasal Swab test: to collect cells deep in the nasal cavity because the nostrils by themselves do not provide a sufficiently accurate sample.
The collected fluid samples are sent to a laboratory for PCR testing (polymerase chain reaction), a standard scientific procedure that involves using samples provided by patients to build models of their DNA.
In this system, technicians can look for evidence of the genetic material (RNA) from the new coronavirus, which is wrapped in the patient’s own DNA if they are infected with the virus.
Both Public Health England and the US Centers for Disease Control and Prevention (CDC) prefer to use Deep Nasal Swab because it is so accurate.
Unfortunately, for suspected Covid-19 patients, it can be uncomfortable.
During the operation, the medical staff is gentle and skilled, so there will be no pain.
What is the correct depth and length of nasopharyngeal swab collection?
See the length of the nasal swab? See how deep it goes into your nostrils?
The length of the nasal swab is normally about 15cm, and it should enter about 2/3 of the time when doing the collection.
The nasopharyngeal swabbing is generally the preferred method of specimen collection for COVID-19 testing.
About the distance from the tip of the nose to the earlobe, insert a thin cotton swab into the nostril, from the lower nasal passage to the posterior wall of the nasopharynx, and then turn the front to take a sample. The swab will have a significantly insufficient depth of entry. So the posture must be correct.
When the throat swab enters in the direction of the earlobe if it encounters resistance, it needs to adjust the direction, rotates it slightly, and cannot forcefully enter it.
Otherwise, damaged. Until the bottom of the rhinitis is reached, there is a general sense of resistance against a wall.
When you feel a sense of resistance, you have reached the bottom of the nasopharynx. At this time, you need to keep the nasopharyngeal swab at the bottom of the rhinitis for 10-15 seconds. After fully contacting the secretion, rotate it and pull it out.
Deep Nasal Swab Manufacturer Virus Respiratory Kit
Specifically designed for the collection, transport and preservation of virus-containing samples such as influenza, covid-19, avian influenza, and respiratory viruses such as hand, foot and mouth. 2-8 ℃ can be stored and transported for a short time, long-term storage should be at -80 ℃ or below.
Disposable medical sample collection swab, consisting of a plastic rod with and a flocked fibre tip
VTM (non-inactivated version) and VTM-N (inactivated version) are available for selection.
Ready-to-use tear-off packaging, is convenient and quick, to avoid possible cross-contamination during use.
Equipped with a biosafety sample bag, which is convenient for placing samples and paper documents, the transfer is safe and reliable.
Product number
product description
VTM-CM-0403
VTM-CM-0202
VTM-CM-0203
10ml sample transport tube contains 3ml VTM transport medium, 1 sampling swab, 1 biological specimen bag
5ml sample transport tube contains 2ml VTM transport medium, 1 flocked swab for sampling, 1 biological specimen bag
5ml sample transport tube contains 3ml VTM transport medium, 1 sampling swab, 1 biological specimen bag
Sampling swabs include nasopharyngeal swab (Deep Nasal Swab) or oropharyngeal swabs
What is Virus Sampling Tube? When should the virus preservation solution be used?
Disposable Virus Sampling Tube Kits
Virus transport medium, virus preservation solution: a protective liquid medium added to the virus sampling tube to protect the samples after nasopharyngeal swab sampling.
Generally, in the process of nucleic acid detection, we cannot directly conduct nucleic acid PCR experiments at the sample collection site.
If we need to check the samples collected by the flocked swab, we need to add the virus preservation solution.
Why use a virus sampling tube?
First of all, we have to understand what is a virus? Why does it need a virus sampling tube?
virus sampling tube
What is a virus?
Virus: a non-cellular form composed of nucleic acid molecules and proteins.
It lives on parasitic hosts and is an organic species between living and non-living bodies.
It is one end of DNA or RNA wrapped in a protective shell.
Through the mechanism of infection, these simple organisms can use the host’s cellular system to replicate themselves but are unable to grow and replicate independently.
Viruses can infect almost all living organisms with cellular structures.
Virus detection is different from conventional biochemical detection.
The virus itself is a simple microorganism and must be parasitic in living cells.
After sampling, when the virus leaves the host cell, its protein shell and nucleic acid degrade rapidly in the sampling tube.
So that the nucleic acid During the test, it is impossible to determine whether the initially collected sample contains the virus, which is likely to cause false negatives.
A virus delivery medium (virus sampling tube), a general-purpose sampling product: for sampling various virus samples, chlamydia samples, and ureaplasma samples.
Short-term storage and transportation at 2-8°C, and -80°C refrigerator or liquid nitrogen Long-term preservation in the environment.
1. For monitoring and sampling infectious pathogenic microorganisms by disease control departments and clinical departments.
Suitable for influenza virus (common influenza, highly pathogenic avian influenza, influenza A H1N1 virus, etc.), hand, foot and mouth virus and other types of virus sampling. It is also used for sampling Mycoplasma, Chlamydia, Ureaplasma, etc.
2. To transport nasopharyngeal swab specimens or tissue specimens from specific parts from the sampling site to the testing laboratory for extraction and testing.
3. Preserve nasopharyngeal swab samples or tissue samples from specific parts for necessary cell culture.
4. For short-term storage and transportation of virus samples at 2-8°C and long-term storage in a -80°C refrigerators or liquid nitrogen environments.
There are two types of virus preservation solutions: inactivated and non-inactivated
The inactivated virus preservation solution is mainly a virus lysis type preservation solution improved by nucleic acid extraction lysis solution, which is added with a high concentration of lysis salt, which can quickly and efficiently deactivate the virus protein in the sample to be tested and can effectively prevent infection.
At the same time, it also contains an RNase enzyme inhibitor, which can protect virus nucleic acid from degradation.
As long as the subsequent NT-PCR experiment can detect the nucleic acid of the virus, we can diagnose it.
Stored at room temperature for a relatively long time.
The non-inactivated preservation solution is mainly a virus maintenance solution that is improved on the basis of the transport medium.
It can retain the protein coat of the virus and the viral nucleic acid DNA or RNA at the same time so that the virus has the integrity of the protein epitope and nucleic acid in vitro.
Of course, there is also a certain risk of infectivity when the operation is wrong.
It is necessary to keep a strictly low temperature for long-term storage after sampling.
No matter what kind of virus preservation solution it is, we must test it as soon as possible after sampling or keep it strictly at a low temperature to ensure that the detection is accurate.
Due to the rapid reproduction and mutation of the virus, the virus preservation solution plays a crucial role in maintaining the stability of the virus sample.
1. Add protein-stabilizing components such as BSA to the sampling solution to reduce the speed of virus decomposition and greatly improve the positive rate of virus isolation. 2. It is stable at room temperature and can keep its activity within 1 year. 3. Gentamicin replaces penicillin to avoid allergic reactions;
4. Using flocked swabs, the sample has a higher collection rate and release rate; Samples can be stored for a long time (-20 ℃ ordinary refrigerator, -80 ℃ low-temperature refrigerator, -197 ℃ liquid nitrogen); 6. Thickening and anti-leakage design to ensure that the sample does not leak, in line with WHO regulations and biosafety regulations.
Disposable sampling swabs, We believe you are familiar with them in the past two years because most of the testing tools used for nucleic acid testing (PCR tests) are disposable sampling swabs.
Usually, we see most nasal swabs and throat swabs, and the sampling swabs we commonly use are flocking swabs.
The flocking swab is a disposable sampling swab composed of a nylon short fibre fluff head and abs plastic rod.
Recently, there have been many concerns about rapid antigen detection on the Internet.
One of them is that if the “single-use sample collection swab” (sampling flocked swab) used in the antigen test is “non-sterile” and “non-sterile”. Bacteria” products. There are risks when using it.
Experts and industry insiders say such concerns are unnecessary as long as qualified products are available through formal channels.
Discard damaged or contaminated swabs.
Specimen collection sterile flocked swab
Are there risks to using “non-sterile” “non-sterile” Specimen collection swabs?
There are two main issues that netizens worry about:
One is to worry about the “bacteria” of the sampling swab, which will affect the results of the antigen test, such as “false positives”;
The second is to worry about the “bacteria” of the sampling swab. During the sampling process, “bacteria” will enter the human body with the sampling swab and affect health.
Nasopharyngeal swab test
Regarding the effect of “bacteria” sampling swabs on antigen test results, experts said that this is a misunderstanding caused by confusing bacteria and viruses.
You know, the antigen test “looks” for the antibodies produced by people infected with the new coronavirus.
The display window of the reagent strip contains a protein that recognizes the antibody, like a dam, blocking the colloidal gold that binds the antibody to the virus. So it appears red in the display window.
Therefore, even if the sampling swab contains “bacteria”, the kit will “ignore” it and focus on “finding” the antibodies produced by the new coronavirus infected person.
Since the kit is not interfered with by “bacteria”, it will not affect the results of antigen detection.
For some people who think that “bacteria” sampling swabs will affect human health, experts say that this may be due to a lack of understanding of “sterile” products.
Sterile
The single-use Specimen collection swab can currently be applied for registration as a second-class medical device, and can also be registered as a first-class medical device (the third-class is the highest level) in the regulatory department.
If it is a Class II medical device, it must meet the sterility requirements when it leaves the factory. While a Class I medical device has no relevant requirements and can be listed in the state of “non-sterile” and “unsterilized”.
Experts said that “sterility” refers to the state of no viable microorganisms. All medical devices must meet certain hygienic requirements, such as strict control of the number of microorganisms before they can be qualified for the market.
Flocked Sterile Swabs
Flocked swabs are mainly used for oral and nasopharyngeal sampling, cervicovaginal sampling, and laboratory testing.
Sterile Flocked Nasopharyngeal Swab is a 100% nylon flocked swab that provides exceptional absorption quality with a flexible handle engineered to reach remote areas of the nasopharynx for specimen collection.
According to different uses, it can also include nasopharyngeal swabs, throat swabs, oral swabs, DNA swabs, and cervical swabs.
It is similar to the above classification, but it is slightly different.
For laboratory testing centres and hospitals.
flocked swab — CellMedical
What are the advantages of flocked Sterile swabs?
Using nylon fibre flocking technology. The front end of the swab has nylon staple fibres fixed vertically. By making the entire collection area of the swab free of absorbent holes. The sample does not scatter and become trapped in the fibres, facilitating faster and more efficient elution.
This makes flocked swabs ideal for PCR work, as flocked swabs are biocompatible and ideal for PCR work.
Only one month after the US lifted the mask order, Philadelphia will usher in a mandatory mask order again.
Beginning April 18, local time, more than 1.6 million Philadelphia residents must wear masks again when entering indoor public places. Philadelphia became the first major U.S. city to impose a mask mandate as cases rose again.
On April 13, the World Health Organization (WHO) New Crown Pandemic Emergency Committee held a meeting. After discussion, it was determined that the new crown pandemic continued to constitute a “public health emergency of international concern”, and countries were advised to prepare for it at any time. Do a good job in vaccination and PCR swab testing.
nasopharyngeal swab test
WHO Director-General Tedros Adhanom Ghebreyesus said: “It’s far from the time to let our guard down.”
According to the latest data from Johns Hopkins University in the United States. The number of confirmed cases of new coronary pneumonia in the world has exceeded 500 million. And the number of deaths has exceeded 6.1 million.
Endorsed by the WHO, in other words, one in 16 people in the world will carry the covid virus.
Since December last year, Omicron has been rampant around the world, with more than 200 million new confirmed cases worldwide in 2022.
500 million, or 5 billion?
At the same time, many experts and even the WHO believe that the number of truly infected people in the world is far more than 500 million, and may even exceed 5 billion.
Not to mention India, Africa and other countries and regions with poor medical conditions, weak testing capabilities, and chaotic management, even in the United States, the CDC has previously acknowledged that the number of infections reported nationwide is estimated to be less than 1/4 of the actual number of infections.
So, can the covid-19 stop this year?
COVID-19: Will The Pandemic End in 2022?
Faced with this question, WHO spokesman Tarik Jasarevic did not respond positively, but reiterated that in order to end the acute phase of the new crown pandemic, scientists have developed an effective epidemic prevention and control response.
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He also warned: “As the new crown epidemic continues to spread on a large scale around the world, the emergence of more new crown variants and recombinant variants is foreseeable.”
Tedros said that the WHO is currently closely monitoring the development of BA.2, BA.4, BA.5 and other Omicron subtype strains, as well as the recombinant XE formed by the combination of BA.1 and BA.2 evolution.
BA series and X series, how dangerous?
Although the number of new cases around the world has been declining for three consecutive weeks. There are also some countries and regions where new cases are still climbing.
Many Asian countries are experiencing the Omicron wave for the first time. In South Korea, new infections and deaths have continued to climb since February. The country now has the world’s highest daily average of new confirmed cases for a week. According to a Reuters analysis, South Korea currently has an average of more than 182,000 new confirmed cases per day, accounting for a quarter of the world’s newly confirmed cases.
Some European and American countries have experienced a wave of Omicron infection peaks at the beginning of this year, but the epidemic has recently rebounded.
In Europe, the daily increase of confirmed cases in France has shown a slow upward trend, and the seven-day average of newly confirmed cases in Germany has declined, but it is still at a high level. Reuters pointed out that the number of new cases in Europe is still huge, with more than 1 million new confirmed cases almost every two days.
At present, BA.2 is the main circulating strain in many countries, accounting for 94% of all gene sequencing.
While BA.4 and BA.5: Found in South Africa and many European countries.
Experts believe that if more people can be vaccinated and more people have the tools to fight the epidemic, then we can reduce severe cases and further reduce infections, thereby gradually ending the pandemic.
He also emphasized that it is very important to continue swab testing while the pandemic is still ongoing so that cases can be accurately tracked.
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