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Covid-19: Antigen Test Self-Test Swabs Must Be Sterilized?

Posted on 2022年4月15日2022年4月15日 by Dr. Lee

Covid-19 antigen test self-test swabs must be sterilized?

New crown antigen test self-test sampling swabs must be sterilized? Alcohol disinfection is required before “non-sterile sterilization”?

Yesterday, a colleague looked at the record, it was about the swab used for the self-testing agent for the covid-19 antigen.

One user found that the swabs were non-sterile flocked swab during use, while some communities received sterilized cotton swabs.

Therefore, it is recommended to sterilize the flocked swab with 75% alcohol before using it.

Experts and industry insiders say such concerns are unnecessary as long as qualified products from formal channels are used.

If citizens receive swabs that are suspected to be damaged or contaminated, please discard them directly according to relevant requirements.

Is it risky to use “non-sterile” and “unsterilized” sampling swabs?

Sterile flocked swabs specimen collection

Specifically, there are two main problems that netizens worry about:

First, they are worried that the sampling swabs will be “bacteria”, which will affect the results of antigen testing.

Such as “false positives” And so on;

The second is to worry about the “bacteria” of the sampling flocked swab.

During the sampling process, the “bacteria” will be brought into the human body, affecting health.

75% alcohol can indeed disinfect cotton swabs, but a flocked swab with 75% alcohol may denature the scraped viral proteins!

The antigen is no longer that antigen, so it may lead to missed detection!

You must know that the antigen test “looks” for the antibodies produced by the new coronavirus infected person.

The display window of the reagent strip contains a protein that can recognize the antibody, like a dam, which intercepts the colloidal gold combined with the virus antibody, which is displayed in the display window. is red.

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 ones are the best.

Ethylene Oxide Covid Test Sterile Swab

Flocked Nasopharyngeal Swab Suppliers and Manufacturers

However, the use of sterile flocked swabs is not mandatory, and the use of non-sterile ones will not affect the detection effect.

For the EU CE self-test, it must be equipped with a sterile CE certified swab.

Non-sterile flocked swabs also have requirements for the number of colonies.

Non-sterile swabs are also sold in the EU (probably for professional use).

A group of friends also said: “I would rather not sterilize it. As it is now, if the epoxy desorption time is not enough, it will be sold. It is better not to sterilize it. Anyway, the oral and nasopharynx is not a sterile environment, so what are you afraid of?”

The expert replied: “Swabs are generally sterilized by irradiation, and less sterilized by ethylene oxide (EO). Even if sterilized by EO, they are packaged in dialysis paper. The general standard for ethylene oxide analysis is 14 days. If the heat is accelerated, it will usually be out in 3 days. Counting the storage and logistics time.

It is basically enough for 14 days, and it is safe for the testers.”

In summary:

The European self-test product is equipped with a sterilized swab, which seems to be a product below the European standard.

At the same time, non-sterile swabs can also be used, but they must meet quality inspection standards, such as colony count.

Finally, remind everyone, do not to use alcohol to disinfect swabs, which may cause missed inspections! Of course, the outer package of the reagent can be sterilized if it is conditional!

Ethylene Oxide Covid Test Sterile Swab

Posted on 2022年3月17日2022年3月30日 by Dr. Lee

EO sterilization refers to ethylene oxide sterilization.

Ethylene oxide (EO) is a highly efficient and broad-spectrum gaseous disinfectant.

It is by far the only most reliable and widely used sterilization method recognized worldwide.

The nasal sampling flocked swabs included in the COVID-19 test kits are sterilized by EO or gamma-ray sterilization.

Rest assured, the swab is safe to use. Including ethane is a gas use commonly used to sterilize different types of medical equipment, flocked swabs for test kits.

The time period for the entire process includes multiple heights and set-up phases, including post-swab removal of sterilized equipment to control ethane treatment.

Allows monitoring of residues in contact with humans (EO amount has been according to ISO 10939-7:2008) ).

Our GMP Factory Flocked Swab Ethylene Oxide Covid Test

Ethylene Oxide Covid Test Sterile flocked Swab Principle

What is the principle of ethylene oxide sterilization (EO sterilization)?

Ethylene oxide, also known as ethylene oxide, has the molecular formula C2H4O.

The boiling point is 10.4°C, it is soluble in water, and the explosion limit in air is 3% to 100% (volume).

Ethylene oxide is a highly volatile, explosive, flammable and toxic substance with ether smell when volatilized. It is a spectral sterilant.

Ethylene oxide can effectively kill various microorganisms, including bacterial propagules, spores, viruses and fungal spores, and is a broad-spectrum high-efficiency sterilant.

Ethylene oxide molecule can produce alkylation reaction with a carboxyl group, amino group, sulfhydryl hydrogen group and hydrogen group on gene proteins necessary for metabolism in bacterial cells.

Instead of the unstable hydrogen atoms on the above groups, form a hydroxyethyl group.

The rooting compound, because this compound destroys the necessary reactive groups in the important metabolic reactions of microorganisms, affects the action of bacterial enzymes, and causes the death of microorganisms.

Nasal swabs included in COVID-19 inspections are EO sterilized.

I heard that ethylene oxide sterilant is toxic and carcinogenic, but covid sterile swaps are all sterilized with ethylene oxide.

Is it safe for us to use a covid swab?

Is the risk of cancer caused by directly entering the respiratory tract greater?

The words “Clean and Sterile EO” on the product packaging of sterile flocked swabs. At this point there’s a crowd that’s saying “

Specimen Collection Swab Ethylene Oxide In Swabs

It’s completely dry here.

There’s no result. But once you put it in a person’s nose, it’s wet. Once you inhale it, it’s going to kill us. It’s really killing people.”

While it’s safe to say that direct exposure to ethylene oxide is actually linked to cancer (here), that doesn’t suggest that swabs sterilized with ethylene oxide definitely cause cancer cells.

Ethylene oxide is a valuable disinfecting gas because it is very good at inactivating bacteria.

It is used in factories in a very tightly controlled method to ensure that people working in manufacturing plants are not put at risk.

It is a common chemical used to sterilize clinical tools and leave a minimal amount of product behind.

In conclusion, EO is a gas commonly used to sterilize clinical equipment such as COVID-19 nasal swab tests.

Ethylene oxide (ethylene oxide) is a highly efficient and broad-spectrum gaseous disinfectant.

It is by far the only most reliable and widely used sterilization method recognized worldwide.

Although EO is carcinogenic, the use of this gas is safely regulated and has actually been used for decades.

Sterilization procedures are regulated to ensure minimal EO residues on medical tools.

What is a Medical Swab

Posted on 2022年1月5日2022年3月22日 by Dr. Lee

What is a Medical Swab

In the COVID-19 sampling, medical flocked swabs are the most commonly used testing method.

Application: oral mucosal cells, oral microorganisms, virus sampling and transportation, DNA/RNA collection, throat sampling, cervical sampling, nasopharyngeal sampling and other fields.

In addition, we can also use medical cotton swabs for the collection and transportation of DNA for paternity testing.

As well as the collection, preservation and transportation of flu specimens.

According to the material, medical swabs can be divided into cotton swabs, foam swabs, non-woven swabs, flocked swabs and other products. Among them, the market share of cotton swabs is higher, reaching 76%.

According to the application field, medical swabs include gynecological, cervical and vagina sampling swabs; oral, nose, and pharynx sampling swabs; laboratory test sampling swabs; virus and bacteria sampling; disposable sampling swabs; sterile cell sampling And other products.

However, due to the influence of new coronary pneumonia and the popularization of nucleic acid testing, the proportion of medical swabs used for specimen sampling is increasing.

With the continuous improvement of medical conditions in developing countries around the world, the application demand for medical swabs is on the rise.

In 2020, the global medical swab market will reach 400 million U.S. dollars, with an output of about 38.4 billion pieces.

Moreover, due to the development of the world economy, the price of medical cotton swabs has shown an upward trend.

Cell Medical swab

Choose the right medical swab

Swabs are one of the most commonly used disposable devices in the medical industry. But how do you know which application to choose? We have put together a brief overview on how to choose the right medical swab for your specific needs.

Cotton swab

The tip of American pharmaceutical-grade spun cotton fiber has become the standard for applicators for all applications from basic patient care to crime scene investigation.

With strong water absorption capacity, softness, low cost and safety, the performance of the cotton swab is consistent and reliable.

However, it is generally not recommended to use cotton swabs for specimen collection.

why? The characteristics of this natural material prevent the sample from being effectively released, and the naturally occurring fatty acids in this material interfere with the processes used in microbiology and DNA extraction and have proven harmful to organisms.

Rayon cotton swab

Rayon is a synthetic fiber made from wood pulp.

Although classified as synthetic fiber, it is actually a natural material.

Unlike cotton, artificial fiber removes materials that may sample or react to samples for transportation and processing during the production process, so it is usually used to sample for diagnostic tests.

Polyester fiber swab

Swab head material adopts polyester filament winding.

Polyester fiber is used for microbial collection, rapid diagnosis and PCR detection.

The polyester scraper has a higher release rate, but its cost is higher than cotton swab and rayon swab.

Foam tip swab:

Foam swab

The swab made of medical polyurethane is a very good diagnostic material, especially suitable for cell sampling.

The number of holes on the surface is generally 100 PPI (holes per inch).

This material has good hydrophilicity and poor absorption of hydrophobic substances.

Used in occasions where resistance to chemical corrosion is required, and it is also used for DNA and microbial sampling.

Synthetic swabs (rayon and polyester) are used to collect bacterial culture specimens, rather than cotton swabs that may contain inhibitory or toxic substances.

Flocked swab:

flocked swabs

First developed flocking technology for cosmetics and industrial production.

Because of the planting process and the use of multi-head bifurcated polyester fiber materials.

The flocked swab has a very high absorption and release rate, and it is also effective for molecular sampling and absorption.

Some institutions designate to conduct research on nucleic acid sampling and certain genome analyses.

At present, the development of swabs not only reflects the changes in the materials of sampling swabs, but new demands in the fields of nursing, testing, and scientific research have led to the multi-dimensional development of swabs.

Nylon Flocked Swabs

Posted on 2021年11月9日2022年3月22日 by Dr. Lee

Nylon Flocked Swabs

Cell medical provides a variety of nylon flocked swab tip sizes and various shaped handles for specific applications.

Cell medical sterile sample collection nylon flocked swabs for sample collection can be Individually-wrapped in a dry transport tubes or peel pouches.

Nylon Flocked Swabs for Sample Collection.

Nylon Flocked Swabs

What is a flocked swab？

NYLON FLOCKED SWABS FEATURES:

*Ergonomics and anatomical design:

Patient comfort and cell sample collection efficiency improved at the same time.

nylon flocked nasopharyngeal swab

*High-quality sample elution:

Unlike traditional swabs, when the sample does not come out of the mattress core.

Nylon Flocked Swab has an open fiber structure that can immediately transfer the sample cells to the liquid medium.

*Rapid absorption (the improved sample collection)

The static electricity is sprayed on the fibre and fixed evenly and vertically on the top of the coater.

This powerful capillary effect quickly absorbs cell samples.

*Increase analysis sensitivity:

Nylon flocked cotton swab can quickly elute more than 95% of the original sample,

so it is easy to improve the analytical sensitivity.

*Just collect, capture and transport:

Peel off the pouch, collect cell samples,

and clip the applicator shaft into the provided delivery medium or cuvette tube.

*Quantitative volume transfer:

Measurable and consistent absorption and transfer from the patient to the test tube,

without an internal mattress core,

disperses and holds precious samples like traditional fiber swabs.

In contrast, the entire sample remains close to the surface for rapid and complete elution.

*Vertical nylon fiber:

Such as a soft brush, can improve the collection of cell samples.

The capillary interaction between nylon fiber bundles not only facilitates the strong water absorption of cell samples

but also keeps the cells close to the surface, which is more convenient for elution.

*Certified without inhibitors and interferences:

Swabs collected are certified DNase, RNase free, and human DNA free.

They also do not contain any PCR inhibitors.

Certificate of analysis for each batch.

*Ideal for automation:

Compared with the traditional fiber wound swab, the 4n6 DNA swab only released a small amount of fibre during the extraction process.

This avoids the risk of clogging the pipettes and probes used by the liquid handling robot.

NYLON FLOCKED SWABS APPLICATION:

*Nasopharyngeal Oropharyngeal viruses collection.

*Microrheologics Microbiology，

*Industrial ， Forensics，

*Bacteriology，*Automation.
*Medical sample collection.

Flocked Swab China Manufacturer

Posted on 2021年11月6日2022年3月22日 by Dr. Lee

Flocked Swab China Manufacturer

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

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

Cell medical (Dongguan) Co., Ltd.

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

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

Flocked Tapered Swab Medical Sterile Test Meaning Stick Vtm kits

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

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

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

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

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

E-mail：flockedswabs@gmail.com