Tag Archives: DNA samples

Flocked Tip Swab

Flocked Tip Swab

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Flocked Tip Swab| China Flocked Swab Factory and Manufacturers.

Detection of viral nucleic acid sequence based on reverse transcription polymerase chain reaction (RT-PCR) is the main means for large-scale screening of new coronary pneumonia.

Generally, nucleic acid detection technology has the characteristics of early diagnosis, high sensitivity and specificity.

And it has the advantages of sample collection and preservation, personnel operation, nucleic acid extraction.

The performance of the kit is the cause of false negative or false positive test results.

Flocked swabs are the main samples for PCR. In the selection of raw materials, flocked glue plays a key role in the collection and release efficiency of swabs. Whether to use high-quality aqueous flocking glue is the main factor affecting the water absorption and hydrophilicity of fluff. The experiment is to compare the sample collection effects of swabs flocked with different glues.

What is a flocked tip swab？

The top of the flocking swab is a nylon fiber structure.

Nylon fibers are deposited on the surface of plastic rod in a certain direction by electrostatic field to form brush layer.

The layers are completely parallel and perpendicular to the inner rod surface.

Flocked tip swab brush head can effectively collect samples.

Flocked tip swab factory Product advantages.

The flocked swab can completely capture the cell sample through the directional friction effect of the brush fiber layer.

The capillary movement between the nylon fibers at the front end of the flocking swab can form a strong hydraulic pressure for absorbing liquid or cell line samples.

Cell samples can also be evenly and neatly concentrated on the near surface of brush fibers, so more than 95% of the samples can be released finally.

Cell Medical (Dongguan) Co., Ltd.  has 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.

Cell medical (Dongguan) Co., Ltd. Daily production of millions of flocked sampling swabs

Cell medical (Dongguan) Co., Ltd. Daily production of millions of flocked sampling swabs. flocked tip swab 

Flocked Swab Meaning

Flocked Swab Meaning

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Flocked Swab Meaning

This article will introduce what is the flocked swab, the purpose of the flocking swab, the application of the COVID-19 flocked swab and the material of the flocked swab, etc. The flocked swab manufacturer introduces. Give you a comprehensive understanding of flocking swabs.

what is the flocked swab?

Flocked Swab Meaning

Since the outbreak of COVID-19, the word “nasopharyngeal swab” has become a high-frequency word we talk about every day.

In recent months, the new crown pneumonia epidemic broke out again in countries all over the world. It’s worrying to watch the data released by WHO every day!!!

Flocked swab material

The flocked swab is made of nylon fiber flocking technology, and the front end is coated with nylon short fiber fixed vertically so that there is no absorption hole in the sampling area of the whole sampling swab, and the sampling sample will not be dispersed and retained in the fiber, which is conducive to faster and more efficient elution.

Traditional cotton swabs can not completely collect and elute samples while flocking swabs can elute 95% of samples. Therefore, the use of flocking swabs has great advantages for various sample collection applications.

The flocked swab is to deposit nylon fibres on the surface of the medical ABS rod in a certain direction through an electrostatic field to form a brush layer.

What is the purpose of flocked swabs?

Flocking swabs are the best choice for nucleic acid detection because they can better collect cell or biological samples at the collection site and release samples quickly.

Application: forensic medicine, DNA, microorganism, virus sampling, Oral swab, nasal swab etc.

What are flocked swabs used for in COVID-19?

The autumn and winter communication season is a period of the high incidence of common cold and influenza, and the most important means to control the epidemic situation is to select real patients with new crown pneumonia from a large number of respiratory tract patients.

At present, the most effective and widely used new crown sampling methods are nasopharyngeal swab and oropharyngeal swab sampling.

Flocked Swab Meaning _Application of flocking swab in COVID-19

Flocked Swab Meaning _Application of flocking swab in COVID-19

Nasopharyngeal swab collection method.

1. Keep the patient’s head still and remove the secretions on the middle surface of the anterior nostril;

2. Measure the distance from the nose tip to the earlobe with a swab and mark it with your fingers. Insert the swab into the nasal cavity in the direction perpendicular to the nose (face). When encountering resistance, it reaches the posterior nasopharynx, keeps the swab in the nose for 10 ~ 15 s, rotates it gently for 3 ~ 5 times, and take out the test flocked swab.

According to the American Society of Microbiology guidelines for the submission of clinical microbial specimens, the nasopharyngeal swab should be twisted on the nasopharyngeal mucosa, retained for 10-15 seconds, and then removed.

Feeling of nasal flocked swabs sampled by U.S. netizens.

netizens 01

netizens 01

It’s hard, and the tough guy still cries.

I have experienced both sampling methods.

It is not a painful cry, but a stress response caused by strong stimulation of the weak nasopharyngeal mucosa, with tears and tears.

netizens 02

netizens 02

No, as a girl, I don’t feel much about the nose swab sampling, except its excitement went to my head.

netizens 03

netizens 03

The more serious one is like eating mustard oil, and the lighter one is like blowing out your nose for several days.

Our netizens are so cute.

About oropharyngeal swab sampling.

oral swab sampling process_ Flocked Swab Meaning

oral swab sampling process_ Flocked Swab Meaning

Feeling of oral flocked swabs sampled by China's netizens.

Feeling of oral flocked swabs sampled by China’s netizens.

Pharyngeal(oral) swab: the collection process is faster (just a few seconds) and less painful, but you may feel nausea and vomiting, and some people have no obvious reaction.

As we are in the epidemic period, we should improve our awareness of self-protection when doing nucleic acid testing.

Flocked swab manufacturer introduces Cell medical (Dongguan) Co., Ltd.

Cell medical (Dongguan) Co., Ltd. is a comprehensive high-tech biotechnology enterprise.

We have invested a lot of scientific research strength to tackle key technical problems.

At present, our virus preservation tube and flocked swab have shown an irreplaceable role in the detection of new infectious diseases.

We support custom production, OEM and so on, and develop products with customers.

Welcome to leave a message for a consultation!

CONTACT US

Email:flockedswabs@gmail.com

China Sterile Flocked Swab

China Sterile Flocked Swab Factory and Manufacturers

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China Sterile Flocked Swab GMP Factory and Manufacturers.

Cell medical (Dongguan) Co., Ltd. specializes in producing flocked swabs. Such as pharyngeal swabs, nasopharyngeal test swabs, oral swabs, nasal swabs etc.

Our flocked swabs are famous for their stable and reliable performance and excellent absorption and elution ability.

Our GMP Factory-We support custom production, OEM

Our GMP Factory-We support custom production, OEM

·OEM / ODM: support

·Certificate: CE / FDA / ISO certification

·GMP factory: Yes

·Supply capacity: 500000-1000000 pieces / month

·Size: 150mm

Sterile Flocked Swab flocked swabs manufacturers

Sterile Flocked Swab flocked swabs manufacturers

The DNA extraction flocked swab produced by our company is made by nylon fiber flocked technology. The front end is coated with nylon short fiber fixed vertically. There is no absorption hole in the whole collection swab collection area, and the DNA cells will not disperse and remain in the fibers, which is conducive to faster and more efficient elution.

Independent sterilization packaging.

The benefits of flocked swabs for COVID-19 viral collection.

1. Sample collection process: The unique structure of the front end of the flocking swab can greatly increase the number of samples collected.

2. Sample dissolution process: The brush-like layer structure can release almost all collected samples. There are more advantages for the collection of trace DNA.

3. According to different analysis items, the corresponding soft or brush texture swabs have reached the maximum collection.

4. Disposable sterile sampling swab rod with breaking point.Learn more

5. Flocked swab technology improves the adsorption/release of samples and the sensitivity of the analysis.

6. The front flocked swab sampling is more precise and suitable for extracting more cells from the nasopharynx.

7. Packed in a transparent plastic tube to avoid biological pollution.

In short, the upright nylon fibre is like a soft brush, which can collect more cell samples. The capillary action between nylon fibers enhances the load of aqueous samples, and the samples are concentrated on the surface of the swab, which is easier to elute. Nylon flocking swab can absorb and release more samples.

Cell medical (Dongguan) Co., Ltd.  –China Sterile Flocked Swab Factory and Manufacturers.

Email:flockedswabs@gmail.com

 

 

Pcr test nasal swab and an antigen test difference for covid 19

Pcr test nasal swab and an antigen test difference for covid 19

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Pcr test nasal swab and an antigen test difference for covid 19

What is COVID-19?COVID-19 is an epidemic disease caused by SARS-CoV-2. An acute respiratory infectious disease broke out at the end of 2019. So far, WHO has been making the latest tracking report on the new pneumonia on the Internet every day.

What are the current methods of COVID-19 test?

Virus detection includes two types: nucleic acid amplification test (NAAT) (PCR test) and antigen test.

Antibody tests (also known as serological tests) can prove whether you have been infected in the past.

What is the COVID-19 PCR test?

PCR (polymerase chain reaction): similar to the natural replication process of DNA, its specificity depends on oligonucleotide primers complementary to both ends of the target sequence.

Basic principle: the basic principle of PCR technology is similar to the natural replication process of DNA. Its specificity mainly depends on the oligonucleotide primers complementary to both ends of the target sequence. It consists of three basic reaction steps: denaturation, renaturation and extension.

PCR test sample collection method include:

If the sample contains a virus, the researchers will extract its RNA.

Why use the PCR test ?

PCR nucleic acid examination is a direct detection of COVID-19 RNA in human body by sampling from the nasal cavity. The structure of virus is composed of DNA or RNA combined with external lipid protective capsule. Therefore, direct detection of virus DNA itself is the most accurate, fastest and effective new detection method. PCR nucleic acid test can detect infection immediately after the human body obtains the virus, and the accuracy is much higher than antibody test.

ABOUT PCR TEST_Pcr test nasal or Throat swab sampling

ABOUT PCR TEST_Pcr test nasal or Throat swab sampling

How does the PCR test nasal swab work?

Nasopharynx swab is to wipe the secretion of the patient’s nasal cavity or pharynx. And then make the secretion into smear for examination and bacterial culture to clarify what bacterial infection is in the patient’s nasal cavity and pharynx.

Nasal swab sampling procedure

1. Keep the patient’s head still and remove the secretions on the middle surface of the anterior nostril;

2. Gently and slowly insert the swab through the nasal cavity to the nasopharynx;

3. After encountering resistance, it reaches the posterior nasopharynx and stays for several seconds to absorb secretions;

4. Gently rotate and take out the swab and place it in the transport medium;

5. For the swab used for virological test, immerse the swab head into the virus delivery medium, discard the tail, and tighten the tube cover;

If it is necessary to collect from both nostrils, the sampler should use the same swab.

How does the antigen test work?

Rapid antigen detection can play an important role in guiding patient management, public health prevention and control decision-making and covid-19 monitoring.

It is especially valuable for grass-roots areas that may hinder clinical diagnosis and control due to lack of nucleic acid detection capacity or long detection time.

According to WHO, high specificity based on antigen detection indicates that the positive results indicate new crown virus infection.

For patients within 9 days of onset, sampling personnel can use antigen detection as a diagnostic test.

Especially for the staff of medical institutions, inpatients and visitors in the epidemic area.

When nucleic acid detection cannot be effectively implemented, antigen detection can be used as an important screening method.

Rapid antigen test sampling procedure.

Rapid antigen test sampling process

Rapid antigen test sampling process

 

Generally speaking, nucleic acid detection: it has high requirements for laboratory environment, detection personnel and instruments. The detection has high sensitivity and good specificity.Generally, we can get the results in 2-3 hours.

Antigen detection: it has low requirements for the laboratory. For early screening and early diagnosis. It is suitable for large-scale screening in grass-roots hospitals. we can obtain the results within 15 minutes at the fastest.

At present, PCR test nasal swab is widely used, and the sensitivity and specificity of antibody / antigen detection reagents are still limited. 

Each has its own emphasis and cannot replace each other. We should combine multiple virus detection methods.

It can effectively shorten the detection window period and improve the positive detection rate.

 

Respiratory Specimen Collections

Respiratory Specimen Collections

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Respiratory Specimen Collections

Today, with the increasingly severe international COVID-19 epidemic, the correct collection of respiratory samples has become an important prerequisite for ensuring the accuracy of nucleic acid detection results.

However, how to correctly collect respiratory samples? Cell medical (Dongguan) Co., Ltd. summarizes as follows:

Why should respiratory tract samples be collected standardized and correctly?

1. Clear diagnosis;

2. Observe the condition and treatment effect;

3. Guide the formulation of treatment measures;

4. Sample quality directly determines the reliability of test results.

 What are the types of respiratory samples?

1. Upper respiratory tract samples (including swabs, nasal specimens, nasopharynx extracts, pharyngeal gargle and nasal lotion, etc.);

2. Lower respiratory tract samples (such as sputum, tracheal aspirate, lung lotion, etc.);

When is the best time to collect respiratory samples?

Respiratory tract samples were collected as soon as possible after symptoms appeared;

Collect as much as possible within 72 hours of the patient’s fever;

Try to collect before the use of antiviral drugs;

If possible, collect multiple times in multiple days;

What sampling tools are needed to collect respiratory tract samples?

1. Virus sampling kits, including flocked swab, virus sampling tube, virus transport medium, etc;

2. Refrigerated transport box;

3. Personal protective equipment: protective mask (N95), protective glasses.

 How to collect respiratory tract samples?

Oropharyngeal swab sampling process:

Oropharyngeal swab sampling pictures

Oropharyngeal swab sampling pictures

1. The sampler first let the patient sit down, then let the patient tilt his head back and open his mouth.

2. Press the front 2 / 3 of the patient’s tongue with a tongue depressor, and wipe the posterior pharyngeal wall and bilateral tonsils with a nylon flocked swab for 3-5 times to avoid touching the tongue.

3. Take out the rear sampling tube, break the plastic handle at the contact part of the hand, soak the swab into the sampling solution, and tighten the tube cover.

Nasopharyngeal swab:

"nasal

Note : do not use too much force, but try to be as deep as possible, usually more than 5cm, stay for several seconds to absorb secretions, gently rotate and take out the swab, place the sampling tube, break the plastic ellipse at the contact part of the hand, and soak the test piece into the sampling solution, Tighten the pipe cover.

Respiratory Specimen Collections preservation requirements

Those that can be detected within 24 hours can be stored at 4 ℃ and frozen at – 70 ℃ for more than 24 hours.

 

Swab test

Swab test | Disposable virus sampling swab

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Swab test | Disposable virus sampling swab

Disposable virus sampling swab, I believe you are no stranger in the past two years. Because most of the detection tools used for nucleic acid test are disposable sampling swabs. Usually, we see most nasal swabs and pharyngeal swabs. But disposable virus swabs are not only useful for nucleic acid testing. What else can a disposable sampling swab do? Let’s get to know.

What can a disposable virus swab be used for?

In addition to nucleic acid detection, scientists can also use disposable sampling swabs for microbial collection. They are usually used for virus detection and research in hospitals or laboratories. Researchers use disposable sampling swabs to detect biological samples in natural cavities of human or animals. Such as throat, nose, mouth, vagina and so on. It is necessary to collect oral epidermal cells and nasal virus samples with a sampling swab, store the cells and samples in the sampling tube and transfer them to the laboratory for examination.

Oropharyngeal swab sampling

Oropharyngeal swab sampling

Operation (use) method of disposable sampling swab:

Take pharyngeal swab as an example:

① Tear open the packaging bag of the disposable sampling swab and take out the disposable sampling swab from the bag;

Note: please do not let the disposable sampling swab touch the place outside the throat to avoid pollution.

② Put a disposable sampling swab into the mouth and quickly wipe the palatal arch and throat (or lesion) on both sides

③ Take out the swab, put it into the disposable virus sampling tube, break the disposable sampling swab at the broken place and discard the tail;

④ Tighten the sampling tube, put the virus sampling tube into the biosafety bag and submit it for inspection in time.

Note: please do not shake the virus sampling tube excessively to avoid dilution and loss of samples. After sampling, do not touch other objects with a disposable sampling swab.

How to carry out COVID-19  nasal swab test?

The doctor shall wear protective clothing, mask, gloves and mask to let the patient take a proper position.

Gently insert the flocked sampling swab into the nose, rotate it for three times, take it out and put it into the sample tube with protective solution, and screw the cover. Then label it, write the date, and send it to the laboratory for nucleic acid test of nasopharyngeal swab.

 

What is a COVID-19 swab test?

Swab test, namely nucleic acid test. The substance test by nucleic acid is the nucleic acid of virus. Nucleic acid detection is to collect the presence of viruses in the respiratory tract, blood or feces of patients, and determine whether they are infected by COVID-19. Therefore, once detected as nucleic acid “positive”, it can prove that there is a virus in the patient’s body.

SARS-CoV-2 nucleic acid detection process.

The usual sample types include throat swabs, nasal swabs, sputum, bronchoalveolar lavage fluid, alveolar lavage fluid and so on.

The sampling personnel shall conduct PCR detection as soon as possible after obtaining patient samples.

After the testing institution receives the sample, the laboratory personnel shall extract nucleic acid from the sample. And the nucleic acid extraction reagent shall use the nucleic acid extraction kit specified in the approved product manual.

Disposable virus sampling swab material.

At present, because of its stable and reliable performance and excellent absorption and elution capacity, nylon flocked swabs are widely used in COVID-19 sampling.

Swab test result

Swab testing for novel coronavirus pneumonia usually takes 4-6 hours to produce results, while rapid examination takes 2-3 hours. However, the reagents used in each hospital are different, so the time of results is also different.

COVID-19 positive results：Maybe infected.After 24 hours of self isolation, the positive patients need to conduct swab test again.

If the two results are positive, the next step is to improve CRP, blood routine, chest CT and other tests to determine whether COVID-19.

When COVID-19 nucleic acid test is negative once, it should be combined with the clinical symptoms and epidemiological contact history of patients. Because a COVID-19 nucleic acid swab test is negative, it can not completely exclude the infection of COVID-19.

 

Iclean nylon flocked swab

Iclean nylon flocked swab

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Iclean nylon flocked swab

Product purpose:

Iclean nylon flocked swab is ideal for bacteriological sample processing, virological cell culture, DFA test, rapid and direct test, enzyme immunoassay test, polymerase chain reaction and molecular diagnosis based test, as well as forensic identification.

For throat sampling of respiratory viruses such as influenza, swine influenza, avian influenza, hand, foot and mouth.

Iclean nylon flocked swab,View more

Iclean nylon flocked swab,View more

Characteristics of sampling swab products:

1. It has extraordinary water absorption capacity, which can increase the number of samples collected on its surface from 20% of traditional sampling swabs to 60%.

2. The release rate of the collected samples is more than 90%, so as to ensure the high reliability of the results.

3. Different preservation solutions were selected for different specimen types.

4. The plastic rod has a unique breakable design to facilitate specimen transportation.

5. Ethylene oxide sterilization, irradiation sterilization, independent packaging.

Iclean gene sampling series flocking DNA oral test pieces are specially used to improve the amount and quality of genomic DNA in oral test piece cells. Oral cell sample is a good non-invasive collection and detection method instead of blood. Combined with icleanhcy’s series of DNA separation and stabilization kits, it can quickly collect high-purity and complete DNA samples.

DNA flocking swab is suitable for human and animal use. It has advantages over other DNA samples in design. Its unique sample matrix and rapid release interface are more conducive to efficient cell collection and maximize DNA yield. The test piece has been sterilized with ethylene oxide and passed the detection of human DNA contamination.

characteristic

The unique test substrate greatly improves the yield of DNA;

Adult oral SWAB piece 1 to 10 μ g DNA;

It is a good alternative to blood collection;

Both human and animal can use it;

Simple and fast operation;

There are two types of single and double disinfection packaging to choose from;

application;

Genotype study;

Veterinary genotyping and diagnosis;

Parent child and genetic services;

Forensic and DNA population studies;

About us

Cell medical (Dongguan) Co., Ltd. produce flocked swabs, VTM kits, virus transport medium, with multiple automatic production lines.We support custom production, OEM and so on, and develop products with customers.

Email:flockedswabs@gmail.com

Disposable virus sampler

Disposable virus sampler

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Disposable virus sampler

♦ Product Name:

① General name: disposable sampler

② Name: sample collection kit

③ Specification and model: cm-93050t, cm-93050rt, cm-93050rtz, cm-96000t, cm-96000ts, cm98000t, cm-98000tl, cm-761tz

♦ Package specification: 50 pcs / bag

♦ Intended use: disposable virus sampling tube_ Sampling swab_ Flocking swab_ Saliva collector_ Nucleic acid detection sampling kit_ Throat swab – cell medical (Dongguan) Co., Ltd.

Medical staff use DNA samplers and disposable samplers for sample collection, transportation and storage.

♦ Structure composition: swabs and test tubes. Non sterile.

Disposable virus sampler_cm-93050t

Disposable virus sampler_cm-93050t

♦ Storage conditions and validity period:

① Products shall be stored in a clean, hygienic, dry and ventilated environment;

② . the temperature is 5 ℃ ~ 35 ℃;

③ . relative humidity ＜ 85% RH;

④ Product validity: two years

♦ usage method:

① Before sampling, relevant information shall be marked on the label of the sampling tube.

② . use the corresponding sampling flocked swab for sampling.

③ After sampling, quickly put the cotton swab into the sampling tube and tighten the tube cover.

④ . see the following for specific sampling methods:

a) Nasal swab: gently insert the sampling head into the nasopalatine part of the nasal canal, stay for a moment, then slowly rotate and exit, put the collected specimen into the sampling tube, and tighten the cover of the sampling tube.

b) Pharyngeal swab: wipe bilateral pharyngeal tonsils and posterior pharyngeal wall with the sampling head, put the collected samples into the sampling tube, and tighten the cover of the sampling tube.

c) Sampling of mycoplasma, chlamydia and Ureaplasma samples:

Male: insert the sampling head into the urethra and rotate about 2cm. Stay for a moment and then exit. Put the collected specimen into the sampling tube and tighten the cover of the sampling tube.

Female: wipe the mucus from the cervical mouth, insert the sampling head into the cervical tube for 1-2cm for sampling, put the collected sample into the sampling tube, and tighten the cover of the sampling tube.

♦ matters needing attention:

① . After collecting the sample, the medical staff shall completely insert the disposable sampling cotton swab into the test tube to retain the sample to the greatest extent.

② . the collected samples must be fresh and submitted for inspection in time.

③ .forbidden to use products with damaged packaging and expiration date to prevent pollution.

④ . forbidden to directly contact the collected patient, and forbidden to sample the patient after wetting the swab.

⑤ . When collecting samples, medical staff should strictly implement the sampling procedures to ensure that the sampling position is accurate and the sampling intensity is uniform and appropriate, otherwise the sample collection quality will be affected.

⑥ The product shall not be used after the expiration date or the product package is damaged.

Note: this disposable sampler : for in vitro diagnosis and not for human or animal internal and external use.

If swallowed, it may lead to serious events and cause certain irritation to eyes and skin. If it accidentally splashes into eyes, rinse with clean water.

♦ essential information

Name of manufacturer: cell medical (Dongguan) Co., Ltd

Domicile: No. 98, Wusha street, Chang’an Town, Dongguan City, Guangdong Province, China

E-mail： flockedswabs@gmail.com

Disposable virus sampling tube kit

Disposable virus sampling tube kit

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Disposable virus sampling tube kit

The virus sampling tube consists of swab + sampling tube + virus preservation solution.

That is, flocked swab, virus sampling tube and virus transport medium.VTM

Why use a disposable virus sampling tube kit？

Virus is a very tiny organism, which is composed of nucleic acid and protein shell. Without its own metabolic mechanism, there is no protease system. Therefore, if the virus leaves the host cell, it cannot continue to survive. Such tiny creatures can bring us many diseases, such as RNA, influenza, HIV and H1N1 viruses. Because it has no cellular structure, the virus itself cannot replicate. Instead, it invades the gene into the host cell and replicates a new virus with the help of the latter’s replication system.

In order to maintain the activity of virus samples and prolong the survival time of virus in samples.

The sampling swab will be stored and transported in the preservation solution.

flocked swab_Disposable virus sampling tube kit

flocked swab_Disposable virus sampling tube kit

Brief introduction

1. In the current COVID-19 epidemic situation, virus sample collection is an important link in virus detection.

2. Disposable virus sampling tube kits can collect, transport, inactivate and store virus samples in specific parts of human body. (not available in the United States).

So what’s the difference between the non inactivated and inactivated virus sampling tubes?

about non inactivated and inactivated virus sampling Virus transport medium

about non inactivated and inactivated virus sampling Virus transport medium

In short, the non inactivated sampling tube can protect the protein nucleic acid of the virus, so that the sampled virus has its originality, better integrity and higher detection rate. In addition to nucleic acid detection, scientists can also use non inactivated samples in other virus research experiments.

Advantages:

★ easy to operate and use

★ add virus stabilizing components to maintain virus activity in a wide temperature range

And reduce the decomposition rate of virus (non inactivated type)

1. Low temperature non freezing storage, does not damage the shell of the virus, and is convenient for long-distance transportation.

2. Applicable to all kinds of swab samples, including oral swab, nasal swab, throat swab, etc.

★ it contains virus lysate and virus nucleic acid preservation solution, which can quickly lyse the virus

Release nucleic acid and stably store nucleic acid (inactivated type)

The inactivated sampling tube contains cleavage salt, which can destroy the protein of the virus. However, it can protect the nucleic acid of the virus, so that the virus has no infectious activity. The sampling virus in the inactivated sampling tube can prevent the risk of secondary infection and ensure the safety of transportation and testing personnel.

note

1. forbidden to directly contact the preservation solution with virus samples.

2. forbidden to infiltrate the swab with preservation solution before sampling.

3. only used for the collection, transportation and preservation of virus samples. It shall not be used beyond the expected purpose.

4. Before using this product, pay attention to the shelf life and whether the packaging is intact.

 

 

 

Sample collection swab :How much do you know about nucleic acid testing

Sample collection swab :How much do you know about nucleic acid testing

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Sample collection swab:How much do you know about nucleic acid testing

The spread of the covid-19  is continuing worldwide. Although the global scientific and medical circles are making every effort to fight the epidemic, it is difficult to predict how the epidemic will develop in the future, and its impact on social development has appeared in many aspects.

Currently, COVID-19 cases are over 220 million.

Currently, COVID-19 cases are over 220 million.

In order to fully control covid-19, the general screening of local areas shall be carried out if necessary.

After identifying the detection object, how to detect it?

1、 What specimen to choose?

According to the recommendations of the American infectious diseases association, the following specimens were used:

The sensitivity of simple oropharyngeal swab may not be enough, so it is relatively easy to miss diagnosis.

The sensitivity of alveolar lavage fluid is the highest, but it is obviously not suitable for universal screening.

Nasopharynx swabs and other operations should also be standardized.

Improper operation may make the quality of collected samples not high, thus increasing the risk of missed diagnosis.

2、 Select the time of detection

It is very important for COVID-19 to measure RNA and choose the right time. One analysis included 7 studies, including 2 unpublished reports, to evaluate the detection efficiency of RT-PCR at different time points after exposure to virus :

On the day of exposure to the virus, the possibility of detecting viral RNA is almost zero;

On the fifth day after exposure, that is, the first day after infection, the detection probability was 62%

About the 8th day after exposure, i.e. the 4th day after infection, the probability of detection was 80%

On the 21st day after exposure, i.e. the 17th day after infection, the detection probability was 34%

In conclusion, exposure to COVID-19 may require multiple tests to avoid missed diagnosis. However, it is not recommended to repeat the test within 24 hours of the previous test; The interval between two tests shall be at least 24 hours.

After 28 days of exposure to the virus, if the infection has not been diagnosed, it is not necessary to continue the detection; At this time, it is almost certain that it is not infected.

Nucleic acid detection throat swab  sampling process

The COVID-19 nucleic acid was novel coronavirus, which was collected from sputum or lower respiratory tract by real-time fluorescent RT-PCR. If positive, the new coronavirus could be diagnosed. This is the basis for the diagnosis of new type of pneumonia. In addition to detecting the nucleic acid of the virus, it can also detect whether the virus in the specimen is highly homologous with New Coronavirus. If so, it can be diagnosed as New Coronavirus pneumonia. The virus is highly infectious and has the characteristics of human to human transmission, but the virus is sensitive to temperature and sunlight and ultraviolet rays.

Sample collection, nasopharyngeal swab sampling

Sample collection, nasopharyngeal swab sampling

Sample collection, Oropharyngeal swab sampling

Sample collection, Oropharyngeal swab sampling

The flocked swab is the best raw material for sampling swabs.

 

 

reference

1，Infectious Diseases Society of America Guidelines on the Diagnosis of COVID-19, updated December 23, 2020. https://www.idsociety.org/practice-guideline/covid-19-guideline-diagnostics/ (Accessed on January 14, 2021).

2，Kucirka LM, Lauer SA, Laeyendecker O, et al. Variation in False-Negative Rate of Reverse Transcriptase Polymerase Chain Reaction-Based SARS-CoV-2 Tests by Time Since Exposure. Ann Intern Med 2020; 173:262.