Tag Archives: VIRUS Collection & Transport Kits

Flocked Swab Manufacturers |Disposable Medical Nylon Sampling swab

Flocked Swab Manufacturers |Disposable Medical Nylon Sampling swab

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Flocked Swab Manufacturers |Disposable Medical Nylon Sampling swabs

Cell medical is a flocked swab and virus transport media manufacturers.

We have our own flocking production technology.

And our flocked swabs are stable and reliable performance and have excellent absorption and evolution capability.

Our company provides forensic, genetic, laboratory supplies, pharmaceutical and food safety, concentrated broth, laboratory automation and artificial intelligence.

As well as sample collection, transportation and processing products.

Now, the disposable sampling swab manufacturers will show you what a flocking swab is？

Flocked swab definition

Flocked swabs meaning

Using spray dense planting nylon fiber technology; The volume of samples collected and released is 3 times higher than that of traditional swabs. Ensure the survival rate of cell samples, no residual fatty acids, and will not affect the test results.

Excellent sample collection / release ability, release rate > 90%.

Conventional flocked swab: the sample is intercepted by the gap in the fiber mass, that is, the sample is penetrated, diluted and intercepted in the fiber. The acquisition is slow and release is slower.

The sampling time of flocked swabs is 3-5 seconds, while the sampling time of cotton swab is 15-120 seconds or even longer, which causes the pressure of staff in the process of diagnosis.

Sterile flocked nylon swab with breakpoint –China swab manufacturers.

What is the breakpoint on flocked swabs?

A conventional model with 30mm, 80mm, 90mm breakpoint swab.

The swabs also feature a moulded breakpoint that allows you to safely and easily break off the swab sticks, and several breakpoint options are available for different tubes. Strong capillary hydraulics between the nylon strands draw up the maximum liquid sample.
Conventional model with 30mm, 80mm, 90mm breakpoint swab.Flocked Swab Manufacturers

Conventional model with 30mm, 80mm, 90mm breakpoint swab.Flocked Swab Manufacturers

Flocked swab with utm

Flocked swab+tube with Viral transport medium

General transport media for collection, transport and preservation.

 

VTM Collection Kits

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VTM Collection Kits

All VTM Collection Kits are currently in stock and ready to ship. Available with or without Phenol Red. Please contact our Customer Service Team for an official quote or to inquire about quantities of 50K or more.

Safely collect, handle and transport clinical specimens with our quality VTM kits, viral transport mediums, swabs and biohazard specimen bags.

Proper specimen collection and transport plays a critical role in laboratory diagnosis of infectious diseases associated with viruses. The VTM Collection Kits offered by Cell medical allow for the collection, preservation and transport of viruses, such as coronavirus (COVID-19). All VTM Collection Kits are made in the China and are manufactured according to CDC protocols for specimen collection and transport. Please note that products are available for research and clinical laboratories only.

Cell medical is  viral transport medium and flocked swab collection kit manufacturer. Please inquire for bulk pricing and larger case packs.

Transport medium: Made in an injection manufacturing facility, GMP(Good Manufacturing Pratice) product

Tube: E-Beam sterilization

Swab: E-Beam sterilization

High virus preservation and recovery rate, high bacterial culture

Corona Virus(Human) Recovery test: 3days, 95~110% Recovery rate

Chlamydia, Mycoplasma and Unreaplasma Recovery test

VTM Viral Transport Medium NP Kit – 3ml Vial

Contains one CELL VTM 3ml vial and one Nasal/Oropharyngeal Swab.
Approved for Emergency Use Authorization (EUA) under the policy outlined in Section IV.C of the FDA’s COVID-19 Transport Media Policy

NP SWAB AND OP SWAB BY SWABMUNUFACTURER

 

Viral Transport Medium China

Viral Transport Medium China Manufacturer

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Viral Transport Medium China manufacturer-Virus sampling tube

Viral Transport Medium is also called virus sampling tubes.

Cell medical not only produces sampling swabs, but also virus sampling tubes, general bacterial sampling tubes and sterile normal saline sampling tubes,Virus delivery medium swab, disposable sampling swab.

The factory is located in Dongguan and belongs to a high-tech enterprise.

Our virus sampling tubes are exported to developed countries in Europe and America and more than 100 countries and regions around the world.

The production capacity of  Viral Transport Medium is very strong, with a daily output of 400000 sets of virus sampling tubes.

Viral Transport Medium Package specification

2ml, 5ml, 10ml, etc.

Intended use

For the transportation and storage of clinical samples.

Inspection principle

Hank’s balanced salt to build a neutral environment;

As a protein stabilizer, bovine serum albumin and Hank’s equilibrium salt increase the survival time and infection stability of the virus;

Antibiotics have broad-spectrum antibacterial effect;

Phenol red is an acid-base indicator.

The pH value of the discolouration area is 6.6 (yellow) ～ 8.0 (red), and it is red when the pH value is 7.2 ～ 7.4.

Limitations of test methods

For the transportation and storage of virus samples.

Product performance index

Appearance: the sampling liquid in the tube is red, transparent and no precipitation liquid;

PH value: when stored at 25 ℃, the pH value is 7.2 ~ 7.4;

Loading capacity: no less than the marked capacity;

Stability: the product shall maintain the stability of various properties within one month beyond the validity period.

Sample requirements

The samples shall be transported to the corresponding laboratory within 2 working days after collection, and the storage temperature shall be 2-8 ℃; If it cannot be delivered to the laboratory within 48h, it shall be stored at – 70 ℃ or below, and the collected samples shall be delivered to the corresponding laboratory within 1 week. Specimens should avoid repeated freezing and thawing.

Main components

Hank’s equilibrium salt, phenol red, bovine serum albumin, gentamicin, polymyxin B, cryoprotectant, etc.

Storage conditions and validity period

Storage condition: 5-25 ℃, validity: 12 months

Viral Transport Medium China Manufacturer

Viral Transport Medium China Manufacturer

Usage

1. Collect samples with a sampling swab according to the sampling requirements.

2. Place the sampling flocked swab after collecting the sample into the sterile sampling tube.

3. Break the swab at the easily broken cut-off point of the sampling swab rod and discard the tail.

4. Tighten the sterile sampling tube cover.

5. Label the sterile sampling tube with information as required.

6. The samples shall be transported to the corresponding influenza monitoring network laboratory within 2 working days after collection, and the storage temperature shall be 2-8 ℃; If it cannot be sent to the laboratory within 48h, it shall be stored at – 70 ℃ or below, and the collected samples shall be sent to the corresponding network laboratory within 1 week. Specimens should avoid repeated freezing and thawing.

7. Specific sampling methods can refer to the following:

1) Pharyngeal swab specimen: use a special sampling swab to wipe the posterior pharyngeal wall and tonsils on both sides with moderate force, and avoid touching the tongue; Quickly immerse the swab head into the sampling solution, break the swab at the easily broken cut-off point of the sampling swab rod, and discard the tail. (applicable to a sampling of this product)

2) Nasal swab specimen: use a special sampling swab, gently insert the swab head into the nasal palate in the nasal canal, stay for a moment, and then rotate and exit slowly; Quickly immerse the swab head into the sampling solution, break the swab at the easily broken cut-off point of the sampling swab rod, and discard the tail. (applicable to a sampling of this product)

Precautions

1. Forbidden to directly contact the sampled liquid with the collected personnel.

2. Forbidden to infiltrate the swab with sampling solution before sampling.

3. Viral Transport Medium is a disposable product.

Only used for the collection, transportation and preservation of clinical virus samples.

4. When collecting virus samples, professionals should strictly follow the sampling procedures;

5. The samples shall be transported to the corresponding laboratory within 2 working days after collection, and the storage temperature shall be 2 ~ 8 ℃;

Specimens should avoid repeated freezing and thawing.

References

1. WHO Global Influenza network monitoring program

Nasal Swab |nasopharyngeal swab sampling

Nasal Swab |nasopharyngeal swab sampling

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Nasal Swab |nasopharyngeal swab sampling .

People who have done nasal swab testing must be deeply impressed by the taste. The normal length of nasal swab is about 15cm, and it is almost 2 / 3 of the depth when collecting. Does the depth of this direct attack on the soul make your heart question: is our nose so deep?

In fact, the nasal cavity is far from the “superficial” nostrils we see.

Continue to go deep into your nostrils, and you will find that it is suddenly bright and unique.

Schematic diagram of nasopharyngeal sampling

Schematic diagram of nasopharyngeal sampling

Nucleic acid sampling is an important part of anti epidemic work.

It is very important to standardize the operation of sampling technology. It is necessary to standardize various sampling operations in order to provide a strong guarantee for the accurate report of subsequent nucleic acid detection.

How to correctly carry out nasopharyngeal swab sampling?

Nasopharyngeal swab collection method

Material preparation.

75% alcohol, wet towel, test tube rack, collection tube, hand disinfectant, nasopharyngeal swab, biosafety bag, collection bar code.

Operation preparation.

1.Prepare medical protective mask (N95), face screen / goggles, protective clothing and latex gloves.

2.Check the validity period and tightness of the acquisition tube; the virus preservation solution for discoloration and turbidity;  the validity period and packaging of nasopharyngeal swab.

Check the collected information.

1.Ask about recent nasal bleeding, obstruction, trauma, etc.

2.Drive the collection tube on the test tube rack.

3.Hand hygiene.

4.Sampling person: takes the seat, tilts his head back later, and pulls the mask to his lips.

5.Estimated acquisition depth (acquisition depth reference): generally half of the distance from the tip of the nose to the earlobe.

6.The operator stands on the side of the subject, and the swab handle is inserted into one side of the nostril in a direction parallel to the upper jaw.

A sense of resistance indicates that it reaches the nasopharynx; Rotate for one week, stay for 15 seconds, slowly take out the swab and insert it into the specimen preservation solution;

The head of the swab shall not touch hands and other objects, the swab shall be broken, the tail shall be discarded, and the cover of the sampling tube shall be tightened.

7.Hand hygiene.

8.Wipe the tube cover with an alcohol wet towel and conduct hand hygiene again.

9.Put the collection tube into the biosafety bag, seal the bag mouth, and put it into the second biosafety bag in the same way.

Nasal Swab |nasopharyngeal swab sampling

Nasal Swab |nasopharyngeal swab sampling

About flocked swab specimens

Nasopharyngeal sampling swabs are composed of nylon short fiber pile head and medical grade ABS plastic rod.

The nylon short fiber acts like a soft brush, which can effectively improve the collection of cellular material;

the capillary movement between the fibers forms a strong hydraulic pressure, thus ingesting the liquid sample;

at the same time, the sample clings to the surface of the swab and is easy to wash off.

Cell medical (Dongguan) Co., Ltd. Sterile flocked swabs collect and elute samples more effectively than any other disposable swabs on the market.

The high-quality fiber and swab physical manufacturing process produce sterile flocking swabs, which is an ideal choice for rapid diagnostic testing.

The rapid release of whole cells and the ability to better collect cells make these swabs the perfect specimen collection for any laboratory or research center.

The ideal collection device must be able to absorb and release samples and maintain their activity.

This is why flocking cotton swabs innovate sample collection equipment.

Sterile flocked swabs collect and retain sample vitality, provide better sample yield, and allow rapid release of samples into liquid media.

Attention

1.The insertion direction of the swab is perpendicular to the face of the subject, not along the nostril.

2.When there is resistance when the swab enters, it shall retreat slightly. Under the condition that the subject tolerates it, readjust the angle before continuing to insert, and do not insert violently.

 

Viral Transport Medium Sample Collection Tube Specimen Collection Kit

Viral Transport Medium Sample Collection Tube Specimen Collection Kit

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Viral Transport Medium Sample Collection Tube Specimen Collection Kit

Viral Transport Medium Sample Collection Tube: for collection, transportation and storage of detection samples.

The virus sampling tube kits includs a flocked swab and a centrifugal tube containing virus preservation solution.

In terms of protection, there are protection requirements.

As the manufacturer of virus sampling tube is a complete set of centrifuge, it can be used for microbial sampling and transportation of influenza virus, hand, foot and mouth disease virus and other viruses.

Therefore, the disposable virus sampling tube is more safe and convenient.

After all, the disposable virus sampling tube is very convenient to use and has no pollution problem.

Product name

Virus preservation solution

Disposable virus sampling tube-Viral Transport Medium

Disposable virus sampling tube-Viral Transport Medium

Package specification

3ml / piece

Intended use

For the collection, storage and transportation of human nasopharyngeal virus samples.

Inspection principle

This product is a non-toxic sample preservation solution. It can inactivate infectious pathogens and avoid the risk of secondary infection during operation. This product can inactivate more than 99% of cells or viruses within 10 minutes at room temperature to release DNA or RNA of cells or viruses. At the same time, the effective components in the preservation solution can keep RNA at room temperature for 7 days without obvious degradation.

Main ingredients

Product name Specifications

Sample preservation solution 3ml / piece

storage conditions and validity period

Keep at 2-37 ℃ for 12 months.

sample requirements

After sampling with this product, stored at room temperature for 7 days.Stored for a long time at low temperature.

Viral Transport Medium Specimen Collection Kit usage

1. Before sampling, clean your hands, rinse your mouth with water for 1-2 times, remove food residues in your mouth, and swallow the remaining water in your mouth.

2. Tear off the outer package of the sampling swab.

3. Put the swab into the mouth and wipe it repeatedly at the medial buccal mucosa for more than 8-10 times until the nylon pile has been fully infiltrated by saliva (there should be no foreign matter such as food residue).

4. Open the sample collection tube, put the sampled swab into the preservation solution for wetting, and break the swab rod near the top.

5. Tighten the tube cap and complete the sample sampling.

precautions

1. Please check whether the package is intact before use. Do not use if damaged.

2. The collected swab samples can be stored at 2-37 ℃ for 7 days and – 40 ℃ for 12 months. In view of the individual differences of samples, the specific storage periods of different samples are different.

3. The nucleic acid of swab samples can be purified using commercial related kits.

Related products: disposable virus sampling tube, virus sampling tube, sampling tube

 

viral transport medium with swab

Viral Transport Medium with Swab

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viral transport medium with swab | COVID-19 sampling and collection kits

The epidemic has disrupted the whole world and affected many industries.

During the outbreak of  COVID-19, people were paying close attention to the epidemic situation while doing personal protection. Novel coronavirus pneumonia and influenza were the most frequent period of communication in winter and spring. The most important way to control the epidemic is to select new patients with new crown pneumonia from many respiratory patients.

About viral transport medium with swab.

Swabs and virus transport media are a transport and collection system for long-term freezing, transport and collection of clinical specimens containing viruses.

The main species of organisms usually transported through this medium include chlamydia, urea plasma organisms and mycoplasma.

With the outbreak of COVID-19 pandemic, swabs and virus transport mediums were used to freeze and collect SARS-CoV-19 virus samples.

Rub a swab on the skin or vesicles to collect virus samples. The collected samples are then sent to the laboratory with transport media.

Why do swabs need virus transport media？

After virus collection, the traditional method can not be detected by PCR immediately. The virus itself will quickly dissolve in vitro and affect subsequent tests.

viral transport medium with swab -vtm kits

viral transport medium with swab -vtm kits

Purpose of virus transport media:

1. For monitoring and sampling infectious pathogenic microorganisms by disease control departments and clinical departments. It is applicable to the sampling of influenza virus (ordinary influenza, highly pathogenic avian influenza, influenza A H1N1 virus, etc.), hand, foot and mouth virus and other types of viruses.

2.For the sampling of mycoplasma, chlamydia and Ureaplasma.

3.. To transport nasopharyngeal swab samples or tissue samples at specific parts from the sampling site to the detection laboratory for PCR extraction and detection.

4.To preserve nasopharyngeal swab samples or tissue samples at specific sites for necessary cell culture.

Precautions for sample transportation.

1. Inspection time and temperature control:

After samples sampling, for inspection as soon as possible and sent to the laboratory within 2 ~ 4H as far as possible.

Transport at 2 ~ 8 ℃, and the transport time shall not exceed 72h. If it exceeds 72h, stored and transported at – 70 ℃ or lower.

2. Viral transport medium transport container:

Virus transport tube：waterproof, damage proof, leak proof, high temperature (low temperature) and high pressure resistant. 
Tube body: biological hazard signs, warnings and reminders with relevant regulations. 
Transport container: three-layer packaging system, namely inner packaging, middle packaging and outer packaging.

3. Transportation in the hospital:

The specimen delivery personnel shall be provided with secondary protection and carry 75% ethanol with them.

4. Long distance transportation:

The transport package of 2019 ncov specimens belongs to class A, and the corresponding UN number is un2814. The transporter shall wear safety protection according to the requirements of class II protection, and carry 75% ethanol with him. Drivers wear surgical masks or N95 masks and transport them by special vehicles. If transported by air, the packaging shall also comply with the pi602 classified packaging requirements of ICAO document Doc9284-AN / 905 technical rules for safe air transport of dangerous goods. At least one specimen transporter and driver shall transport specimens at the same time, and monitoring facilities for specimen transport process shall be equipped.

Contact us

  • Cell medical (Dongguan) Co., Ltd.
  • skype:+86-18814476009
  • E-mail：flockedswabs@gmail.com
  • No. 98, Wusha street, Chang’an Town, Dongguan City, Guangdong Province, China
  • Web：www.swabmanufacturer.com/

 

Sample Universal Viral Transport Medium Kits

Sample Universal Viral Transport Medium Kits

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Sample Universal Viral Transport Medium kits

Cell medical (Dongguan) Co., Ltd. disposable sample universal viral transport medium kits are composed of flocked swabs and test tubes with virus preservation solution (VTM).

The appearance of VTM is clear or red, and there are no precipitates, lumps and other insoluble visible foreign matters.

For collecting, storing and transporting human nasopharyngeal virus samples. Such as COVID-19, mycoplasma,  Chlamydia specimens collection, transportation and preservation.

Universal Viral Transport Medium for Viruses 

Test principle:

Virus: Composed of a nucleic acid molecule and protein or only protein, and the individual is small and the structure is simple. Because there is no cell structure, the virus cannot replicate itself, but invades its genes into the host cell, using the latter’s replication system to replicate new viruses. After the virus sample is collected, in order to maintain the viability of the virus sample and prolong the survival time of the virus in the sample, the sampling swab will be stored and transported in the transport medium.

Viral transport medium composition and inspection principle:

Viral Transport Medium

Viral Transport Medium

1. A combination of multiple antibiotics has broad-spectrum anti-bacterial and anti-fungal effects.

2. As a protein stabilizer, bovine serum albumin (BSA) can form a protective film on the protein shell of the virus, making it difficult to decompose and ensuring the integrity of the virus.

3. The neutral environment constructed by Hank’s buffer helps increase the survival time of the virus and the stability of infection.

4. Phenol red is an acid-base indicator, the discolouration area is 6.6 (yellow)-8.0 (red), and it will be red at 7.2-7.4.

The most stable pH of the outer protein of the virus is 7.2-7.4, which is also the pH range of Hank’s buffer.

If contaminated moulds or bacteria are not inhibited by antibiotics, they will multiply and release carbon dioxide to lower the pH. When the pH value is lower than 7.2-7.4, the stability of the outer protein of the virus will decrease and the decomposition will be accelerated. At this time, the appearance of the sampling solution will change from red to yellow.

What are the main components of  Viral Transport Medium(VTM)?

Hank’s solution base, gentamicin, fungal antibiotics, cryoprotectants, biological buffers and amino acids.

On the basis of Hank’s, adding HEPES and other virus stabilizing components can maintain virus activity in a wide temperature range, reduce virus decomposition speed and improve the positive rate of virus isolation.

How to use a universal viral transport medium?

Please read the instructions carefully before use.

Working conditions: room temperature

1. Take out the virus preservation solution.

2. Use a sampling swab for sampling.

3. Insert the swab into the tube containing virus preservation solution, break the tail, leave it in the preservation solution tube, cover the tube cover.

4. Store it at 2-4 ℃ and use it within 48 hours.

If it needs to be stored for more than 48 hours, please store it in the refrigerator at – 20 ℃.

VTM swab kit COVID-19: diagnostic vector transport medium.

VTM swab kit COVID-19: diagnostic vector transport medium.

Our VTM product features and advantages.

1. A virus transport medium (VTM) in line with the recommendations of who and CDC.

2. The product is safe, environment-friendly and non-toxic.

3. The universal viral transport medium adds special virus stabilizing components to maintain the structural stability of virus core protein and outer membrane protein for a long time.

4. It is especially suitable for influenza virus and other samples sampled through upper respiratory tract swabs.

5. Compatible with other detection reagents.

6. The reagent itself has a colour indication function, and obvious color change will occur when the product deteriorates, so as to avoid misuse caused by improper preservation.

Disposable virus sampling medium

Disposable virus sampling media 10ml transport tube for sample collection

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Disposable virus sampling media with 10ml transport tube for sample collection.

Product Description

Disposable virus sampling tube

Disposable virus sampling tube

Product name:Disposable virus sampling tube.Keyword:sample collection kit,virus sampling medium.

Function:sample collection,storage,transport virus.

OEM/ODM: accept.

Place of Origin: Guangdong, China.

Disinfecting Type: EO.

 

 

Sampling tube specification

Sampling tube specification

 

Properties: Medical Materials & Accessories.

Tube Volume: 5/10ml.

Stock: yes.

Shelf Life: 12 months.

Material: PP.

Quality Certification: ce,MSDS.

Instrument classification : Class I.

 

Virus DNA / RNA sample preservation solution (inactivated or non)

I believe that my friends must be very curious when they first came into contact with this term. Virus DNA / RNA sample preservation solution, also known as cell preservation solution, virus transport medium or disposable virus sampling tube.

What is a virus transport medium?

First, the virus preservation solution is a liquid that immerses the sampling swab virus sample in the sampling tube and protects the detected substance (DND or RNA) of the virus.

It is mainly used for the collection, preservation and transportation of common virus samples such as New Coronavirus, hfmv, influenza virus and so on.

Researchers can use it to collect throat swabs, nasal swabs, or tissue samples from specific sites.

The samples are stored in a disposable virus sampling tube, which can be used for subsequent clinical experiments such as nucleic acid extraction or purification.

We divide virus transport media into two types, one is non inactivated and the other is inactivated.

The non inactivated type can protect virus protein and nucleic acid, preserve virus activity and facilitate culture and detection.

The inactivated type makes the virus no longer have physiological activity, lose infection and disease, and have fecundity, which can inactivate the virus.

Eliminate secondary infection and protect the safety of transportation and testing personnel.

Because the virus is a parasite, it cannot survive in vitro after sampling. If it cannot be detected in time, it needs to be stored in virus preservation solution.

In order to protect the security of virus detection environment and detection personnel, our virus inactivation preservation solution comes in handy.

Some friends may wonder if the inactivated type will inactivate the virus? How can we check it?

Don’t worry, the purpose of using inactivated preservation solution is to lyse nucleic acid.

Release nucleic acid and then detect nucleic acid through subsequent real-time fluorescent RT-PCR to judge whether the sample contains virus characteristic nucleic acid, that is, whether it is infected with virus.

The virus has a single structure and contains only one nucleic acid and protein. Therefore, the virus is detected when the characteristic nucleic acid is detected.

Then some friends will ask, since the detection is so simple, why do you need virus preservation solution? What role does it play?

Usually, after virus sampling, not all samples can be transported and stored at the sample collection place.

Therefore, we need to transport and retain the collected virus swab, otherwise the virus nucleic acid will degrade quickly and the nucleic acid cannot be detected.

Therefore, we need to add preservation solution to the sampling tube to prevent the virus nucleic acid from being degraded so quickly.

Cell Medical’s virus preservation solution allows viral DNA/RNA to be stored and transported at room temperature for 1 week without degradation.

After extraction using most commercial kits, the obtained DNA/RNA is of high quality and high yield, and can be used for various gene testing and analysis experiments, such as PCR and qPCR, while saving transportation costs.

Cell Medical’s inactivated virus storage fluid uses a small volume storage fluid compared to the large volume storage fluid of a traditional virus sampling tube, which avoids excessive dilution of the collected samples and increases detection sensitivity.

And our inactivated virus storage solution is so easy to use that you can take samples at home.

Moreover, our inactivated virus preservation solution is simple and convenient to operate. You can take samples at home.

Well, if you have anything you don’t understand or want to consult, please leave us a message.

We will have a professional doctor and my little brother will let you answer.

About us

Cell medical (Dongguan) Co., Ltd. is a professional manufacturer and supplier of sampling swabs and virus sampling tubes.

We produce flocked swabs, VTM kits, virus transport media, with multiple automatic production lines.We support custom production, OEM and so on, and develop products with customers.

Welcome to consult us.

Email:flockedswabs@gmail.com.

China universal viral transport medium

China universal viral transport medium factory manufacturers

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China universal viral transport medium factory and manufacturers

Product specification

VTM KIT_Virus sampling tube

VTM KIT_Virus sampling tube

[common name]: disposable virus sampling tube, viral transport medium kits,universal viral transport media.

[specification and model]: 3ml / piece, 100 pieces / bag

[main structure and performance]

It usually consists of swabs and/or preservation tubes containing viral transport medium.

[scope of application]

For sample collection, transportation and storage.

[action principle]

After sterilizing the sampling tube, add virus stable components such as Hank’s base solution, which can maintain the activity of virus in a wide temperature range, reduce the decomposition speed of virus and improve the positive rate of virus isolation.

 

Description

Viral Transport Medium (VTM) allows the safe transfer of viruses, chlamydia and mycoplasma for further research, including conventional cell culture methods, diagnostic tests, and molecular biology techniques.

Commercially prepared viral transport media are available in a screw cap plastic tube containing buffered proteins (serum, albumin or gelatin) and antibiotics.

Viral transport medium composition

Our viral transport media contains Hanks Balanced Salt Solution (HBSS) with Calcium and Magnesium and contains heat-inactivated Fetal Bovine Serum, Gentamycin and Amphotericin B.

The composition and the manufacturing of the Viral Transport Medium follow the WHO and the CDC recommendations.

[contraindications, precautions, warnings and suggestive instructions]

1. After sampling with a virus sampling tube, the sampler shall submit it for inspection as soon as possible.

At the same time, the transportation personnel shall immediately transport the virus samples at a low temperature of 2-8 ℃.

The results showed that the virus samples could be stored at 2-8 ℃ for 48 hours; But for long-term storage,  below – 20 ℃ and – 70 ℃.

If the sampler does not immediately transport at low temperature or store at the specified temperature after sampling. It will affect the positive rate of virus sample separation in the later stage.

2.  prohibited to use it for the sampling of bacterial samples. The antibiotics contained in the sampling solution can inhibit bacteria.

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

4. The sampling personnel shall collect virus samples in strict accordance with the sampling procedures to ensure the accuracy of sampling location. At the same time, the sampling intensity is uniform and appropriate, otherwise, it will affect the positive rate of virus isolation.

5. It is forbidden to use the expired or damaged product package.

6. The experimenter shall test the samples in a laboratory meeting the safety level.

Factory profile

Virus transport medium factories, Cell medical is a professional manufacturer of sampling swabs and disposable virus sampling tubes (viral transport medium).

The factory is located in Dongguan, China, with a daily production capacity of more than 1 million sets, aseptic filling technology and aseptic swab production technology.

China universal viral transport medium factory and manufacturers_Cell medical (Dongguan) Co. ,Ltd.

China universal viral transport medium factory and manufacturers_Cell medical (Dongguan) Co., Ltd.

China VTM tube factory GMP factory_Cell medical (Dongguan) Co. ,Ltd.

China VTM tube factory GMP factory_Cell medical (Dongguan) Co., Ltd.

Cell medical (Dongguan) Co., Ltd., vtm kit factories, vtm swab factory, produce flocked swabs, VTM kits, virus transport medium, universal viral transport media, with multiple automatic production lines.

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

Get Latest Price

Email:flockedswabs@gmail.com

Comparison of advantages of various testing methods of COVID-19

Comparison of advantages of various testing methods of COVID-19

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advantages of various testing methods

The detection methods of COVID-19 mainly include nucleic acid detection, antibody detection and antigen detection. Due to the low detection rate of antigen, the SARS-CoV-2 detection mainly focuses on antibody and nucleic acid detection. Nucleic acid detection has the characteristics of early diagnosis, high sensitivity and specificity; However, antibody detection is convenient and rapid, which can be used as a supplementary means of nucleic acid diagnosis. Due to the limitations of “false positive” and “false negative” antibody detection, it is not suitable for general population screening such as returning to work,  and school, nor for epidemiological investigation in low epidemic areas.

NAT Detection process

The detection procedure needs to go through five steps: sampling, sample retention, preservation, nucleic acid extraction and computer detection.

First, collect samples according to the instructions of the kit. The sample types include pharyngeal swab, nasal swab, sputum, bronchial lavage fluid, alveolar lavage fluid, etc.

Because RNA is easy to degrade, flocked swabs without RNase and storage tubes without RNase are used when collecting samples.

After obtaining the patient’s sample, it needs to be tested as soon as possible. If it cannot be tested immediately, it needs to be packaged at low temperature and sent to a special testing institution for testing.

After receiving the sample, the testing institution shall extract the nucleic acid from the sample. The nucleic acid extraction reagent shall use the nucleic acid extraction kit specified in the approved product manual.

Finally, fluorescence PCR nucleic acid detection, that is, machine detection. It takes 70-80 minutes to amplify the extract by fluorescence PCR.

Sample collection, oropharyngeal swab or nasopharyngeal swab

Sample collection, oropharyngeal swab or nasopharyngeal swab

NAT Detection process Nucleic Acid Testing

NAT Detection process Nucleic Acid Testing

Antibody detection

After the virus invades the human body, the human body will produce corresponding specific antibodies for defense.

According to different molecular structures and antigen specificity, scientists divide immunoglobulins into five categories: IgG, IgA, IgM, IgD and IgE.

After the antigen enters the human body for the first time, plasma cells secrete antibodies after a certain incubation period. IgM first appeared, but the antibody had short maintenance time, low concentration and low affinity. It lasted for several days to several weeks in the blood. It was a diagnostic index of acute infection; When IgM is about to disappear, the content of IgG reaches the peak. IgG appeared late, but its concentration was high, its maintenance time was long and its affinity was high. The positive serum IgG indicates the middle and late stage of infection or previous infection.  But the antibody content increases rapidly in the short term, which may be several times to dozens of times higher than the original antibody content. It is mainly IgG, which lasts a long time in the body, and IgM rarely increases.

In this epidemic, the researchers studied patients with covid-19 and found that after the virus invades the human body, IgM antibody takes about 5-7 days to produce and IgG antibody takes 10-15 days to produce.

Antibody detection kits-advantages of various testing methods

Antibody detection kits-advantages of various testing methods

Comparison of advantages and disadvantages of two different detection methods

Compared with the serological detection of antibodies, Nucleic Acid Testing can detect patients in the window stage.

Early detection of infected persons is the “gold standard” for COVID-19 detection, but it requires higher detection equipment or platform.

The high sensitivity RT-PCR instrument is expensive, and the laboratory cleanliness and operator requirements are higher. In addition, nucleic acid detection takes a long time. Considering the sample transportation and sample backlog, the results can be reported as soon as 24 hours.

Compared with nucleic acid detection, blood samples detected by antibody serology are easier to obtain. If the RNA of the virus detected by nucleic acid is the direct evidence of the existence of the virus, the antibody detection is the antibody stimulated in the patient’s blood, which is indirect evidence and has a suggestive effect on the clinic.

When nucleic acid detection is negative, adding IgM and IgG antibody detection can make up for the shortcoming that nucleic acid detection is easy to cause missed diagnosis.

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