Tag Archives: DNA Evidence Collection

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

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

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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

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

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!
Nylon Flocking Throat Oral Swabs Flocked Nasal Swab

How to Collect DNA Buccal Swabs

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DNA can tell you a lot about you.

DNA sample collection DNA is collected from an individual (or individuals) using sterile swabs while following appropriate collection techniques.

A DNA test can do this by looking at your DNA to determine the DNA “function” it exposes in your genetic code.

This is the “feature” that some tests can provide for health and life.

The reason for the method information.

Under the license of numerous DNA companies, some will sequence your DNA through your clients to help you understand your family tree, the migration patterns of your ancestors.

Proper DNA sample collection techniques are an essential skill for forensic scientists, crime scene investigators, and medical examiners. We can collect DNA samples from many different sources.

Products found at a criminal crime scene that may not actually involve a true crime may provide DNA evidence.

What is a DNA test and how is it done?

Use your doctor’s genetic sample to test you or be asked to spit in a test tube , or be asked to flocked swab in a tube in your mouth.

If you have frequent dry mouth, you need to do a cheek test. Another could be a lemon bite, the taste of a lemon, and then a bite of the lemon. When to get those drools back. Besides, you can also learn a little more but about DNA testing things!

DNA sample collection method

: generally choose routine: bloodstain, oral test, long sample;

Swab collection method:

  • Rinse your mouth with water to make sure there is no food residue in your mouth.
  • Open the DNA storage solution tube. Turn the cap down and the spout up.
  • Unwrap you and stick your fingers around the probe. It is important not to probe with a profiler of a profiler, as this can affect the profiler results.
  • Insert a medical DNA swab into the mouth and rub 30 times on the cheeks.
  • Take a cotton swab and dry the swab in the shade; use the same method to collect three DNA subs.

Exactly how to prevent DNA evidence contamination

When managing all organic evidence for DNA screening, it is imperative for investigators and laboratory staff to wear the correct personal safety equipment, use tidy instruments, and avoid interactions with various other objects to reduce the threat of compromise of any evidence.

Improper storage space, direct exposure to direct sunlight, or simply being comfortable can all cause damage to DNA. To avoid damage, keep accumulated evidence in a dry and cool place and send it to the laboratory immediately.

What is the source of DNA you can wipe?

You can easily wipe down many common DNA sources. These include blood, feces, urine, semen, saliva, hair, teeth, bones, and cells. DNA can also accumulate from selected surfaces and materials.

Where can DNA samples be obtained?

DNA samples can be extracted from drinking glasses, cigarette butts, food with bite marks, bite marks on the skin, etc. You can also wipe down frequently touched surfaces such as computer keyboards, doorknobs, steering wheels, glasses, and countertops.

 

Flocked Swab With UTM

Flocked Swab With UTM

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Flocked Swab With UTM

  • UTM Swabs are area temperature level secure, likewise incorporates a cryoprotectant;
  • Safe and also trustworthy precision moulded breakpoint swabs with a captured cap that immediately finds the viral swab into the lid for transportation.
  • Solution additionally includes anti-biotics to prevent bacterial as well as fungal vegetation.
  • SAFE, SHATTERPROOF, STAND UP tubes with internal conical shape making it possible for centrifugation of examples.
  • Quick release and also diffusion of example product and infection particles during vortexing with 3 glass beads in a tube.
  • Readily available as filled Universal Transportation Tool tubes wholesale or as patient sample collection loads with either Gathered Swab (regular or mini idea) or polyester fiber swabs.
  • Ideal for nucleic acid amplification assays including Chlamydia Trachomatis/Neisseria gonorrhoea.
  • Ideal as an Infection collection and transportation swab.
COVID SWAB TEST

COVID SWAB TEST

UTM OR VTM KITS

The disposable nasopharyngeal UTM sampling kit of cell medical (Dongguan) Co., Ltd. is used to collect samples for covid-19 detection. The kit contains a virus transport medium (VTM or UTM) for nucleic acid detection and virus culture. It can be stored at room temperature before collection and at 2-8 ° C after collection to avoid the breeding of pollutants.

Flocked Swab With UTM

Flocked Swab With UTM

 

 

FAQ

Founded in June 2009, we focus on R&D, production and sales of DNA test swab kits or Universal Viral Transport Medium kits.

 

Yes. From 2016, about 56% annual revenue had been funded on the new factory building on the genetic test kit, production equipment updating, talent introduction and staff training, construction & management of our new class 100,000 cleanroom & class 100,00 Laboratory for DNA test kit adhere to GMP.

 

Yes, our new class 100,000 cleanroom & class 100,00 Laboratory for DNA test kit adhere to GMP.

In Jan 2018, a Free sale certificate( DNA test swab kit) based on GMP is issued to us.

 

Yes, OEM, ODM of DNA test kits are both available.

can customize your logo &text on the package & our DNA Test swab collection kit.

DNA Specimen Nylon Fiber Flock Dacron Sample Collection Flocked Swab

DNA Specimen Nylon Fiber Flock Dacron Sample Collection Flocked Swab

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During the outbreak of the new coronavirus pneumonia, while everyone is doing personal protection, they are also very concerned about the epidemic situation.

Originally, the social season in winter and spring was a period of the high incidence of common colds and flu, and the most important means to control the epidemic was to screen out the real patients with new coronary pneumonia from many respiratory patients.

The following small series will introduce some common virus sampling detection methods for you.

Nasopharyngeal swab

Collect nasopharyngeal swab specimens within 3 days of the onset of the patient as much as possible.

Measure the distance from the tip of the nose to the earlobe with a swab and mark it with your finger, insert the swab into the nasal cavity in the direction perpendicular to the nose (face), and the swab should be at least half the length from the earlobe to the tip of the nose so that the swab stays in the nose for 15 ~30 s.

Gently rotate 3 to 5 times, quickly put the swab into a sample collection tube containing 2 ml of lysis buffer (the same as the lysis buffer in the nucleic acid extraction kit) or a cell preservation solution containing RNase inhibitors, and insert the swab.

Then break the sterile swab rod near the top, screw the cap tightly and seal it with parafilm.

Oropharyngeal swab

Collect throat swab specimens from patients within 3 days of onset as much as possible. It is advisable to use a sterile flocked swab for sampling, wiping the posterior pharyngeal wall with moderate force, avoiding touching the tongue; quickly put the sterile swab into the collection tube used for collecting nasopharyngeal swabs, and break it near the top Sterile swab rod, screw cap tightly and seal with parafilm.

Anal swab (feces)

For patients with gastrointestinal symptoms such as diarrhea in the early stage of the disease, an anal swab should collect a stool sample (soybean size) of 3-5g.

The specimens were collected in a screw-cap specimen collection tube containing 2 ml of normal saline (RNase inhibitor can be added if available) and sealed with parafilm.

How to collect nasopharyngeal swabs

There is absolutely no need for the sampler to stand directly opposite the patient. Regardless of whether the patient is sitting or lying, right-handed patients can stand on the right side of the patient, and left-handed patients can stand on the left side for sampling operations.

The advantage of standing on the side is that if the patient has a cough, sneeze, etc., it can be avoided in time.

After the nasopharyngeal swab is passed through the nostrils.

It is perpendicular to the coronal plane of the head or the face and penetrates deep from the inferior meatus to the posterior wall of the nasopharynx, and it is enough to feel the wall.

The nasopharyngeal swab enters the nasal cavity to a depth of approximately the distance from the tip of the nose to the earlobe (see figure).

The “American Society for Microbiology Clinical Microbiological Specimen Submission Guidelines. ” We ask to twist the nasopharyngeal swab on the nasopharyngeal mucosa, hold it for 10-15 seconds, and then take out. Children’s cooperation is poor.

We generally take out the Flocked swab in three to five seconds after fully twisting it 2-3 times.

Except for paying attention to the depth of the swab. We should also note that there is always the habit of having the patient lift their head completely, bend the swab, and take a sample. This is wrong.

In fact, the above approach is wrong. This operation will cause the swab head to stay in an incorrect position. And the final sample obtained is not a standard nasopharyngeal swab specimen.

 

Flocked Swab China Manufacturer

Flocked Swab China Manufacturer

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Flocked Swab China Manufacturer

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

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

 

Cell medical (Dongguan) Co., Ltd.

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

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

Flocked Tapered Swab Medical Sterile Test Meaning Stick Vtm kits

Flocked Tapered Swab Medical Sterile Test Meaning Stick Vtm kits

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

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

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

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

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

 

 

 

UTM Tube with NP Flocked Flexible Swab

UTM Tube with NP Flocked Flexible Swab

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UTM Tube with NP Flocked Flexible Swab

Whether nucleic acid detection or virus detection.

Universal Transport Medium (UTM) and NP Flocked Flexible Swab sampling swab play a great role.

NP Flocked Flexible Swab : Used to collect virus samples.Nasopharyngeal sample.

While virus preservation solution plays the role of preserving these virus samples.

which not only ensures the integrity of nucleic acid virus, but also facilitates the later detection accuracy.

How many Universal Transport Medium are there? What are the functions and differences?

At present, there are two kinds of Universal Transport Medium on the market, namely inactivated virus preservation solution and non inactivated virus preservation solution.

Inactivated Virus Transport Medium :Use to lyse and inactivate the virus.

It can protect the tester from the second infection of the virus.

Stored at room temperature for a relatively long time, saving the cost of virus samples and transportation.

The purpose of non inactivated virus preservation solution is to retain the protein shell of the virus and the nucleic acid DNA or RNA of the virus, so as to ensure the integrity of the nucleic acid of the virus sample in the process of submission for inspection.

Although there will be a certain infectious risk in case of misoperation, this preservation solution maintains the originality of the virus sample to the greatest extent and is a cultured virus transport medium.

Noted:long-term storage requires strict low-temperature storage after sampling.

Relatively speaking, the non inactivated virus preservation solution has higher requirements for the laboratory, higher sensitivity and more applications. But it is relatively easy to be infected.

As long as there are no problems in sampling and detection operations, there will be no risk problems.

How to select inactivated and non inactivated virus preservation solutions cannot be generalized, We should choose according to different needs, and the price determines the quality.

Don’t be greedy for small things and lose big ones.

About NP Flocked Flexible Swab

Features of Flocked Swab