Tag Archives: nasopharynx Sampling

Deep Nasal Swab Virus Respiratory Kit

Deep Nasal Swab Virus Respiratory Kit

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As of April 30, local time, the number of new coronavirus patients in the United States has reached 81.2 million, and the number of deaths due to new coronavirus infection has exceeded 992,000.

As the government ramps up testing for Covid-19, many of us ordinary people are now being tested for Covid-19.

What is Deep Nasal Swab?

Deep Nasal Swab ( nasopharyngeal swab ) is actually a relatively long collection swab, similar to a relatively long sterile swab.

Its main function is to take nasopharyngeal secretions for bacterial culture and drug sensitivity tests.

The source of infection in the nasopharynx and the microorganisms in the nasopharynx were selected and identified by bacterial culture and drug sensitivity test.

Then a drug susceptibility test can be done to determine which drugs are sensitive so that sensitive drugs can be selected for treatment.

So that a better curative effect can be achieved, so the nasopharyngeal swab is actually a flocking swab for collecting nasopharyngeal samples.

China Sterile Flocked Nasopharyngeal Swab GMP Factory and Manufacturers.

China Sterile Flocked Nasopharyngeal Swab GMP Factory and Manufacturers.

Why deep nasal swab for covid?

The Deep Nasal Swab test: to collect cells deep in the nasal cavity because the nostrils by themselves do not provide a sufficiently accurate sample.

The collected fluid samples are sent to a laboratory for PCR testing (polymerase chain reaction), a standard scientific procedure that involves using samples provided by patients to build models of their DNA.

In this system, technicians can look for evidence of the genetic material (RNA) from the new coronavirus, which is wrapped in the patient’s own DNA if they are infected with the virus.

Both Public Health England and the US Centers for Disease Control and Prevention (CDC) prefer to use Deep Nasal Swab because it is so accurate.

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Unfortunately, for suspected Covid-19 patients, it can be uncomfortable.

During the operation, the medical staff is gentle and skilled, so there will be no pain.

What is the correct depth and length of nasopharyngeal swab collection?

See the length of the nasal swab? See how deep it goes into your nostrils?

The length of the nasal swab is normally about 15cm, and it should enter about 2/3 of the time when doing the collection.

How Accurate Is The Nasal Swab

The nasopharyngeal swabbing is generally the preferred method of specimen collection for COVID-19 testing.

About the distance from the tip of the nose to the earlobe, insert a thin cotton swab into the nostril, from the lower nasal passage to the posterior wall of the nasopharynx, and then turn the front to take a sample. The swab will have a significantly insufficient depth of entry. So the posture must be correct.

When the throat swab enters in the direction of the earlobe if it encounters resistance, it needs to adjust the direction, rotates it slightly, and cannot forcefully enter it.

Otherwise, damaged. Until the bottom of the rhinitis is reached, there is a general sense of resistance against a wall.

When you feel a sense of resistance, you have reached the bottom of the nasopharynx. At this time, you need to keep the nasopharyngeal swab at the bottom of the rhinitis for 10-15 seconds. After fully contacting the secretion, rotate it and pull it out.

Deep Nasal Swab Manufacturer Virus Respiratory Kit

Specifically designed for the collection, transport and preservation of virus-containing samples such as influenza, covid-19, avian influenza, and respiratory viruses such as hand, foot and mouth. 2-8 ℃ can be stored and transported for a short time, long-term storage should be at -80 ℃ or below.

Disposable medical sample collection swab, consisting of a plastic rod with and a flocked fibre tip 

VTM (non-inactivated version) and VTM-N (inactivated version) are available for selection.

Ready-to-use tear-off packaging, is convenient and quick, to avoid possible cross-contamination during use.

Equipped with a biosafety sample bag, which is convenient for placing samples and paper documents, the transfer is safe and reliable.

Product number product description
VTM-CM-0403

VTM-CM-0202

 

VTM-CM-0203

 10ml sample transport tube contains 3ml VTM transport medium, 1 sampling swab, 1 biological specimen bag

 

5ml sample transport tube contains 2ml VTM transport medium, 1 flocked swab for sampling, 1 biological specimen bag

 

5ml sample transport tube contains 3ml VTM transport medium, 1 sampling swab, 1 biological specimen bag

Sampling swabs include nasopharyngeal swab (Deep Nasal Swab) or oropharyngeal swabs

 

Anterior Nasal Swab VS Nasopharyngeal Swab

Anterior Nasal Swab VS Nasopharyngeal Swab

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How do avoid damage to the nasal cavity through nasal swab sampling for nucleic acid detection and antigen detection? Rhinitis patients should pay attention to what?

Standardized collection methods for nasopharyngeal swabs :

Nasopharyngeal Swab

Nasopharyngeal Swab

1. The sampler lightly supports the head of the person to be collected with one hand, and sticks the swab into the nostril with the other hand.
And slowly penetrates backward along the bottom of the lower nasal passage. Because the nasal passage is curved, do not use excessive force to avoid traumatic bleeding.
2. When the top of the swab reaches the back wall of the nasopharyngeal cavity, gently rotate it for one week. (If you have a reflex cough, it should stay for a while). Then slowly take out the swab, and immerse the swab head in the matching test strip. In the sampling tube of the virus transport medium.
The nasopharyngeal collection method collects a sample from the nasopharynx, which is the upper part of the throat behind the nose.

Nasopharyngeal Swab Pcr Test

Nasopharyngeal Swab Pcr Test

In this test, a small pointed flocked swab is inserted into the nostril parallel to the chin until resistance is felt.

Inserted no deeper than half the distance between the nostril and the ear.

The swab is then swirled a few times while remaining in place, and then slowly removed while gently swirling.

If the flocked tip of the swab is completely saturated with the sample, it may not be necessary to collect samples from both nostrils.

This method is often less comfortable for the patient but is generally not considered painful.

This method is not recommended for self-testing and should only be performed by a healthcare practitioner.

Swabs for use in the nasopharynx are designed with a micro-tip made of ultra-fine flocked material and a thin, flexible handle usually made of polystyrene.

Standardized collection methods for nasal swabs (anterior nasal swabs):

Anterior Nasal Swab

Anterior Nasal Swab

1. The collected person first used toilet paper to remove the snot, and then tilted his head slightly.
2. The sampler lightly supports the head of the person to be collected with one hand, holds a swab with the other hand and sticks it into one nostril. And slowly goes back along the bottom of the lower nasal passage for 1-1.5 cm. And then sticks to the nasal cavity and rotates at least 4 times. (The residence time is not long. less than 15 seconds). Then repeat the same procedure in the other nasal cavity using the same swab.
3. After slowly taking out the flocked swab, immerse the swab head in the sampling container containing the preservation solution that comes with the test strip.
Precautions:

  • 1-1.5cm deep into the nasal cavity (about 1cm for children).
  • Rotate 4-5 times against the nasal cavity (time not less than 15 seconds).
  • Bilateral nasal collection from the same swab.

Standardized collection methods for oropharyngeal swabs (pharyngeal swabs):

When Taking An Oropharyngeal Swab

Oropharyngeal sampling swab

1. The head of the person being collected is slightly tilted, the mouth is wide open, and the mouth shape is “ah”, exposing the pharyngeal tonsils on both sides;
2. Pass the swab across the base of the tongue, and wipe the pharyngeal tonsils on both sides of the subject with slight force back and forth at least 3 times.
And then wipe the posterior pharyngeal wall up and down at least 3 times.
 And immerse the swab head in the preservation solution provided with the test strip. in the sampling container.

 Why do nucleic acid testing (PCR swab test), and what can be detected?

Nucleic acid testing is to find direct evidence of the presence of the virus.
A positive nucleic acid test for the new coronavirus pneumonia indicates that the subject has the virus in the body and may be infectious.
 If accompanied by fever, respiratory symptoms or other clinical characteristics of patients with new coronary pneumonia, combined with a positive nucleic acid test, a patient with new coronary pneumonia can be diagnosed; if there are no clinical symptoms and a positive nucleic acid test result, it can be determined as an asymptomatic infection. Therefore, nucleic acid detection is of great significance as a standard for diagnosing new coronary pneumonia.

Nasopharyngeal swab test and Anterior Nasal Swab test, which is better?

As we all know, nucleic acid detection generally takes throat swab detection, and throat swab detection is divided into nasopharyngeal swab detection, Anterior Nasal Swab, and oropharyngeal swab detection. The difference between them is that the sampling sites are different, but there is no essential difference. Most medical institutions use oropharyngeal swab testing because this testing method is less uncomfortable for the sample and more convenient for sample collection.
For the sampling of the new crown antigen professional version and home self-test version. Because this method is less invasive, and generally more comfortable for the patient.
VTM Collection Kits (VTM Kits) For Diagnosis

VTM Collection Kits (VTM Kits) For Diagnosis

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VTM Collection Kits preservation systems such as virus collection.
For the collection and transportation of coronavirus, virus, bird flu, hand rash, and measles. The original aptamer and the original specimen, Chlamydia branch.

Generally, the virus subsystems and components are probed from the mouth, nose, throat, throat swab, etc.: throat probe virus preservation, transportation, and biohazard bags.

The CellMedical Virus Collection and Storage System is compatible with most DNA and RNA isolation methods.

It has been validated for COVID-19 testing.

VTM Kits

VTM Swabs

VTM Swabs

Safe and convenient transportation:
It inactivates microorganisms and viruses for safe and convenient transportation and handling.

To save RNA/DNA:
Used to store total RNA and DNA, including viral RNA and DNA, at room temperature.

Sample Type:
Used to collect a variety of sample types, including nose, mouth, throat, and skin samples.

 

 

 

 

Flocked Swab

Flocked Swab

Nylon flocked swab

Made of nylon fibre flocking technology, the front end is coated with nylon short fibers fixed in a vertical manner.

Increasing the efficiency of collection and release of cellular and fluid samples.

So that there is no absorption hole in the entire collection area of ​​the swab.

The collected sample does not disperse and remains in the fibre, facilitating faster and more efficient elution.

Traditional spun cotton swabs cannot completely collect and elute the sample, while flocked swabs can elute more than 95 per cent of the sample collected.

So the use of flocked swabs has great advantages for a variety of sample collection applications.

Because most of the testing tools used for nucleic acid testing are disposable sampling swabs, we usually see more nasal swabs and throat swabs.

Improve analytical sensitivity, no sample residue, and speed up sample processing.

PS stickers come off easily. Suitable for cervical, nasopharyngeal, oral, forensic collection systems and DNA collection, etc. Individually packaged.

Flocked swabs are biocompatible and ideal for PCR work.

PCR is compatible, free of RNase and DNase, so the new flocked swabs are ideal and a good choice for scientists working with PCR technology.

Flocked swab sampling is more comfortable and easier to use;

CellMedical’s flocked swabs use the existing technology “spraying technology”, which is to vertically attach millions of nylon fibres to the head of the medical swab shaft through electrostatic charges in the flocking hair.

Flocked Nasopharyngeal Swab Suppliers and Manufacturers

Flocked Nasopharyngeal Swab Suppliers and Manufacturers

The vertical nylon fibres resemble a soft brush.

During sampling, the user will have no foreign body sensation.

In addition, different parts have different breaking points of the flocking swabs used, and the thickness of the swab rod is also different.

So there is a big difference in softness.

For example, for nasal swabs, the upper end of the swab rod is thin and soft, and the breaking point is also relatively back.

China Nasal Swab Manufacturing

China Nasal Swab Manufacturing

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Swab manufacturers & suppliers

Nasopharyngeal swabs are suitable for collecting and transporting virus specimens such as covid-19, clinical influenza, avian influenza, hand, foot and mouth disease, and measles, as well as specimens of chlamydia and mycoplasma.

In order to respond to this round of the epidemic, stop the spread of the virus and reduce the risk of infection.

At present, we have successively carried out multiple rounds of swab testing for the new coronavirus.

Why are oropharyngeal swabs and nasopharyngeal swabs performed in covid swab testing?

covid flocked swab

covid flocked swab

Nasopharyngeal swab refers to the collection of secretions from the throat or nose of a patient with a specialized sterile flocked swab.

We generally use nasopharyngeal swabs to detect viral nucleic acids, viral antigens, and bacterial cultures.

The collection site of the oropharyngeal swab should be the pharynx and tonsils.

The basic steps of collecting the pharyngeal swab are to tilt the patient’s head back, open the mouth wide, and remove the secretions on the surface of the nasal cavity.

The sampler fixed the tongue with a tongue depressor and used polyester or calcium alginate test paper to cross the base of the tongue.

Wiped the posterior pharyngeal wall and the lateral wall of the tonsillar recess 3-to 5 times to collect mucosal cells.

Remove the swab gently, avoiding contact with the tongue, uvula, oral mucosa, and saliva, and insert the swab back into the sampling device or a suitable transport device.

Nasopharynx swab vs oropharyngeal swab

Nasopharynx swab vs oropharyngeal swab

The main difference between the two lies in the sampling method and sampling location.

The detection rate and accuracy of nasopharyngeal swabs are higher than those of oropharyngeal swabs.

Still, nasopharyngeal swabs are more complicated and difficult to operate, and people with nasal diseases。

Such as rhinitis and nasal polyps will not easily adapt, Bleeding may occur during the collection process, so the collection speed is slow.

Compared with nasopharyngeal swabs, oropharyngeal swabs are fast, simple and easy to collect.

And the detection rate can meet the requirements.

Therefore, oropharyngeal swabs are often used in large-scale screening.

For key groups or middle- and high-risk groups.

Required to collect nasopharyngeal swabs, or even stool and blood samples.

In addition to nasopharyngeal swabs and oropharyngeal swabs.

There are also detection methods such as serum, anal swabs, deep cough sputum, nasopharyngeal or respiratory tract extracts, and bronchial lavage fluid.

In general, the method of sample collection will be determined according to different populations and different needs.

China Nasal Swab Manufacturer – CellMedical Company.

We produce flocked swabs, VTM kits, viral transport medium, production line

We produce flocked swabs, VTM kits, viral transport medium, production line

Nasopharyngeal swab factories, Cell medical is a professional manufacturer of sampling flocked 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.

Nasopharyngeal Nylon Flocked Swab supplier

Nasopharyngeal Nylon Flocked Swab supplier

Sterile Nasal Swab Wholesale

Sterile Nasal Swab Wholesale

Cell medical (Dongguan) Co., Ltd.,  a professional VTM kits and swabs manufacturer, and disposable swab tubes exporter, has many years of experience in medical application molding and flocking treatment heads and swabs.

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

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

Our factory is our customer’s factory.

CONTACT US

Email:flockedswab@swabmanufacturer.com

 

Nasal Swab Test

Nasal Swab Test

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The person who did a few nasal swabs tells you how to do it without pain.

I’ve done nasal swabs several times and it’s been painless every time. Much more comfortable than a throat swab.

I see a lot of people on the Internet saying that the nasal swab is very painful, sour and straight to the sky, this is because your posture is not correct! !!

How Accurate Is The Nasal Swab

Nasopharyngeal swabbing is generally the preferred method of specimen collection for COVID-19 testing.

Looking at this schematic diagram, in fact, no matter the nasal swab or the throat swab.

Their purpose is to let the flocked swab sample from the inner wall of the throat.

Nasal swabs are not meant to poke your heavenly lid!

Nasopharyngeal culture

A nasopharyngeal culture is a test that examines a sample of secretions from the uppermost part of the throat, behind the nose, to detect organisms that may cause disease.

Nasopharyngeal Swab Pcr Test

Nasopharyngeal Swab Pcr Test

Therefore, you should tilt your head as far back as possible to allow the cotton swab to go in horizontally.

That way the only thing you feel is a little bit of cold, and it’s over in less than 5 seconds.

But if you keep your head upright, then the flocked swab can only be poked from bottom to top, which will definitely pierce the upper part of the nasal cavity.

That position is very sensitive, and it will hurt very much when pierced.

And because the doctor can’t see the location, he can only stir in it by the feel of the hand, so you will be sour to tears.

One sentence summary: Tilt your head back and let the flocked swab go in and out horizontally all the way.

Why you should take the swab test.

This test identifies viruses and bacteria that cause upper respiratory symptoms.

These include:

Bordetella pertussis, the bacterium that causes whooping cough Meningococcus meningitidis.

The bacterium that causes meningococcal meningitis is Staphylococcus aureus, the bacterium that causes staph infections Methicillin-resistant Staphylococcus aureus virus infection.

For example, influenza or respiratory syncytial virus cultures can be used to help determine which antibiotic is appropriate to treat infections caused by bacteria.

Normal Results The presence of common organisms in the nasopharynx is normal.

What an abnormal result means The presence of any disease-causing viruses, bacteria or fungi means that these organisms may be causing your infection.

Sometimes, organisms like Staphylococcus aureus can exist without causing disease.

The test can help identify resistant strains of the organism (methicillin-resistant Staphylococcus aureus, or MRSA) so that people can be quarantined if necessary.

Risks There are no risks to this test

viral transport swab

Viral Transport Swab

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VTM Viral Transport

For Viral specimen collection, transport and preservation.  The Viral Transport Swab kit is suitable for the majority of viruses including Coronavirus, Flu, Bird Flu and HFMD.

Available in individual transport tubes in bulk or as patient collection kits paired with a swab.

Viral Transport Swab Disposable virus sample collection kit

Viral Transport Swab Disposable virus sample collection kit 

Sterile Sampling Swab Nylon Flocked Material Φ2.2x150mm (Stick), Approx. Ø3mm (Tip)
Transport Tube 10ml sample transport tube
Transport Medium  3ml per 10ml tube

 

  • Flocked swabs contain plastic stick to breakpoint flocked swabs;
  • Optional non-inactivated virus tasting tube or suspended transmission tool;
  • Ready-to-use easy-tear product packaging to avoid cross-contamination;
  • Offer biohazard sampling bags for secure transport;
  • 50 per pack;

Each viral collection kit consists of a sterilized peel bag including a snappable swab used to collect the sample, a transport tube consisting of a tool into which the swab is placed after tasting as well as a biohazard bag used to place the transport tube for transportation.

Once a swab sample is accumulated it should be placed promptly into the transport tube submitted to the lab as promptly as possible.

Although VTM can preserve organisms for long periods of time at area temperature it is advised that specimens need to be kept at 2-8 ℃ when possible while in transit. If there will be a lengthy delay before processing samplings they ought to preferably be saved at -70 ℃

 

Technical Specification

Technical Specifications

VTM Viral Transport Media is suitable for the collection, preservation and transportation of common virus samples such as COVID 19, influenza virus, hand, foot and mouth virus.

Flocked Nasopharyngeal Meaning Swab Test Sample Collection Vtm Kit

Vtm Kit tube

  • It is a liquid of a tested substance that protects against viruses. It usually uses a throat swab, nasal swab or tissue sample from a specific location to collect the sample.
  • Tube size: 2ml, 5ml, 10ml
  • Swab size: 150 mm with a breakpoint of 80 mm in the nasopharynx and 30 mm in the oropharynx.
  • liquid: 1ml, 2ml, 3ml, 5ml Shelf life: 1 year

 

Category of example conservation solution （ VTM or UTM）:

Non-inactivated: constructed in 2-3ml UTM( Global Viral Transportation tool) option, pink transparent liquid, conservation solution formula suitable for infection conservation.

Which can preserve the activity of infection in a vast temperature level variety and attempt to preserve the originality of the example.

Without lysate, it can preserve the activity and stability of the virus as well as can be utilized for virus culture as well as seclusion.

Inactivated kind: nucleic acid removal lysate boosted virus lysate preservation solution.

The suspended kind consists of a high focus of bosom salt, which can swiftly and successfully suspend the viral protein of the example to be tested.

We can spot nucleic acid by RT-PCR to judge whether the sample includes virus characteristic nucleic acid.

It consists of cleaved nucleic acid materials, so regarding spot nucleic acid by RT-PCR, so as to evaluate whether the sample consists of virus characteristic nucleic acid.

Precautions:

1. For in-vitro diagnostic usage only.

2. Usage aseptic technique and biohazard preventative measures when collecting and dealing with sampling.

3. Decontaminate all biohazard waste including samplings, containers and media after their use.

4. Delays in transportation and the absence of refrigeration might minimize recuperation of the organisms.

5. Don’t make use of after expiry date, and don’t utilize if there is proof of leak, the shade of the medium has altered shade or shows up turbid.

 

The Mission of A Virus Test Swab

The Mission of A Virus Test Swab

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The Mission of A Virus Test Swab

From the sampling point to the testing room, then to the temporary storage point of medical waste.

Then to the hazardous waste centre, to the power plant, and finally to the soil.

A swab for nucleic acid detection completed the task and became a piece of pollution-free ash and fill it in the soil.

At present, we are in a critical period of anti-epidemic.

An ordinary hospital has a maximum of 11,220 samples per day at a single sampling point.

The Mission of A Virus Test Swab

The Mission of A Virus Test Swab

At nine o’clock in the morning, at the nucleic acid testing and sampling service point, citizens who were ready to test lined up.

Everyone wears a mask and consciously separates one meter from each other.

At the beginning of the inspection window, the heavily armed nurses washed their hands with an antiseptic solution.

And then removed a flocked swab about 15 cm long from the packaging bag to take a sample before taking the throat swab.

The nurse opened the collector’s mouth wide, and she skillfully inserted the flocked swab into her pharynx.

Then picked up a sampling tube (virus transport medium) with her left hand. And inserted the collection stick into the sampling tube with her right.

With a little force, the tip of the cotton swab breaks enters the sampling tube, seals it. And throws the long stick into the yellow medical waste bin.

As a testing point for ordinary citizens and inpatients, as an ordinary citizen and inpatients, the use of cotton swabs in an ordinary hospital reached 11,220.

Medical waste treatment forms closed-loop management in nucleic acid testing laboratories.

Take the flocked swab, put the swab head into the sampling tube, and paste a barcode similar to “ID card”. And carefully seal it, put it into a transparent sealed box.

And then send it to the transfer cabin of the PCR laboratory of the Department of Infectious Diseases by staff wearing protective clothing.

The PCR laboratory is under negative pressure, and after the virus enters, it cannot come out. After the outbreak, the PCR laboratory strictly abides by the medical waste treatment process, forming closed-loop management of the laboratory.

An hour later, staff in protective suits transported medical waste out of the ward in sealed yellow bags and sealed with “extremely infectious waste”.

Then, the workers send these medical wastes by trolleys to the medical waste temporary storage area at the nucleic acid collection point 100 meters away. For the medical wastes for nucleic acid testing, he transports an average of about 35 kilograms per day.

We need to place the virus sampling tube for 48 hours during the transfer process

Except for professionals, our PCR laboratory does not allow patients and the public to enter here.

To ensure safety, all medical waste from nucleic acid testing collection points, including swab sticks, is kept here for 48 hours.

After our test results come out and are confirmed to be correct, they will be sent to the hazardous waste treatment centre by a medical waste transfer vehicle.

At ten o’clock in the morning, the staff of the hazardous waste centre arrived at the scene. Unload the empty shipping box and load the ship with medical waste that has been sitting for 48 hours.

The sampling flocked swabs used must be incinerated at high temperatures above 1100°C.

There are two buildings, an incineration workshop and a cooking room, in the yard of the Hazardous Waste Center.

The staff in protective suits skillfully unload boxes of medical waste from the transfer vehicle and load boxes of hazardous waste into bucket elevators.

 

How to Swab For Covid Test

How to Swab For Covid Test

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How to Swab For Covid Test

Since the outbreak of novel coronavirus pneumonia, we must have experienced nucleic acid testing. Covid swab test Nucleic acid detection plays a very important role in the process of infection diagnosis of COVID-19. It can not only find asymptomatic patients in the incubation period as much as possible but also greatly reduce the risk of infection.

Nucleic acid detection is so important. Next, Dr Li will take you to have an in-depth understanding of the relevant principles of nucleic acid detection, the difference between mixed collection and single collection of nucleic acid detection, and the matters needing attention in nucleic acid detection, to help you better protect yourself while popularizing knowledge.

To understand nucleic acid detection, we must understand the detection principle. Let’s take a look at its detection principle first.

The doctor is testing the patient's nasopharynx swab

The doctor is testing the patient’s nasopharynx swab

What is the principle of nucleic acid detection?

Nucleic acid, the genetic factor of the virus, is a macromolecular chain composed of four nucleotides. Different molecules represent different nucleotides and form a long chain. Nucleic acid detection is through the detection of nucleic acid in the chain, and this segment of nucleic acid is COVID-19 specific, other viruses do not.

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

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

The substance detected by the nucleic acid is the nucleic acid of the virus. At present, the detection technology is mainly through PCR (polymerase chain reaction) technology to detect the nucleic acid of the virus. During the detection, the nucleic acid chain of COVID-19 was used as the detection target, and the target gene sequence was amplified by PCR Test, which was combined with a fluorescent labelled probe added in the test reagent to produce a fluorescence signal.

The three forms of nucleic acid detection have their advantages.

Nasal swab test

This test method is to insert the test swab vertically into the nostril. And gently rotate the swab, stay in the nasal cavity for about 15 seconds, to test.

Flocked Tip Swab Nylon Sterile Nasal Swab Stick

Flocked Tip Swab Nylon Sterile Nasal Swab Stick

Compared with throat swabs, nasal swab testing is more accurate for inexperienced testing personnel. And the risk of exposure is lower. However, it is not suitable for some patients with nasal allergies, high blood pressure and people who take anticoagulation and antiplatelet for a long time.

Throat swab test

At present, the most widely used detection method is also a form that is often used by everyone. During the sampling process, the patient opened his mouth and made an “ah” sound, and the testing personnel used a sterilized cotton swab to gently and quickly wipe the pharyngeal lateral wall and posterior pharyngeal wall of the subject many times.

COVID-19 Testing:PCR swab test,antibody test, and antigen test difference

COVID-19 Testing: Throat swab test

Throat swab testing: Often used in the testing process because it is more convenient and fast to collect, and it is more acceptable to the public, but the risk of exposure is also greater.

Anal swab test

This test method is a method of inserting a test swab into the anus and taking a sample at the fold of the anus or taking a sample at 2 to 3 cm for a new coronavirus test.

Many patients reject anal swab testing, but anal swabs can improve the accuracy of testing for new coronavirus infections to a certain extent. Some patients indeed have negative throat swabs, but positive ones are detected by anal swabs. In some patients, the anal swab test was still positive after the other two tests turned negative.

Anal swab

Anal swab

Why do multiple nucleic acid tests need to be performed?

Multiple nucleic acid tests are necessary for epidemic prevention and control.
A negative nucleic acid test does not mean that the tested person is not at risk of infection. Any detection method has the possibility of errors, especially in high-risk areas. To ensure the accuracy of the inspection results and better prevent and control the spread of the epidemic, multiple rounds of inspections must be carried out. There are also the following reasons for taking multiple rounds of detection:

After virus infection, the human body has a certain value-added period. When testing, if the virus in the body does not reach a certain concentration, we may not detect the virus.

When the specimen was collected, due to the different sampling methods, no virus cells were collected. False-negative specimens can also lead to inaccurate collection results.

Errors in the transportation process and storage of samples for inspection will also affect the results of nucleic acid testing.

Therefore, for risk areas and special populations, multiple rounds of nucleic acid testing must be carried out to more accurately and effectively detect the virus source, so as to better and more accurately prevent and control and identify infected people, and cut off the source of the virus. No matter what kind of inspection process, attention must be paid.

About COVID-19 Swab Test

About COVID-19 Swab Test

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About COVID-19 Swab Test

The new crown virus has mutated continuously.

From Delta to Omi Keron, the COVID-19 virus has continued to mutate, and the global epidemic is prevalent at a high level.

Canada announced that all entry personnel from all countries except the United States are required to be tested for the new coronavirus.

At this time, whether you are leaving the country or entering the country.

I even worry or doubt whether I have contracted the coronary disease.

Perhaps understanding the new coronavirus test has become a compulsory course for most people.

What is the new crown swab test, how to collect a nasopharyngeal swab?  Is nasal swab sampling painful?  If your test result is positive, what do we need to do?  Why do most virus tests choose to flock swabs? Is nasopharyngeal swab accurate? Should you be tested for nasopharyngeal swab samples?

We talked with Dr. Li of Cell medical to learn more.

What is the COVID-19 test and what are the test methods?

Nucleic acid detection (RT-PCR Test) method, antibody detection, and antigen detection.

A swab test simple, effective, and fast way to detect COVID-19.

Including nasopharyngeal swab testing and oropharyngeal swab testing.

Medical staff will use flocked swabs to take samples from the nose and throat and put them into the virus sampling tube.

There are two types of swab sample testing: molecular test (PCR) and antigen test.

How to perform a COVID-19 nasal swab test?

The COVID-19 nasal swab test involves inserting a 6-inch flock (a long stick with a very soft brush) into the cavity between your nose and mouth (nasopharynx).

The medical staff inserts the flocking swab into each nostril for about 15 seconds and rotates it several times to collect enough samples for testing.

The samples are then sent to the laboratory for testing, and our test results are usually known within or within the next day

Since the nasopharynx is in a sensitive position of the body, it will produce a lot of very strange sensations.

On the one hand, the swab is inserted deeply into your nose and it irritates the lacrimal glands.

At this point, you don’t know if you are moved to tears or you are crying in pain.

The nasal swab test is not very painful, but it is very uncomfortable. Some people may have nausea during the nasopharyngeal swab test. Nasal swab painful.

Because the swab will also touch the back of your throat, this reaction is normal.

Whether it is tearing or nausea, nasal swab testing is a common phenomenon.

Don’t worry, everything is normal.

Are there other types of COVID-19 swab test methods available?

Yes, an oropharyngeal swab is one of the options.

Of course, if you want to experience another feeling, an anal swab test is also a good choice.

But they are not as sensitive as the COVID-19 nasal swab test.

Israel’s development of the new coronavirus “saliva detection method” saliva detection still needs scientists to confirm on a larger scale. There is no conclusion yet, but it is promising.

In addition to nucleic acid testing for the detection of viral genetic material, there is also antigen testing.

Currently, nasal swab testing for COVID-19, including nucleic acid testing, is still the best choice.

How about the covid test kit at home? Are their results reliable?

The home covid test kit sounds very attractive.

Home covid test usually refers to individuals collecting samples of themselves or their family members through sampling swabs.

We put the collected samples in test tubes with a virus transport medium, and then transport them to the testing facility.

Although you can use the Home covid test kit to test COVID-19 safely and comfortably in your own home.

However, Dr. Li suggested that it should be carried out at a professional testing institution.

Because the quality of the samples we collect and the integrity of the samples during transportation will affect the sampling results.

How accurate is the nasal swab test for COVID-19?

How to obtain a precise nasopharyngeal swab specimen?

Polymerase chain reaction (PCR) uses a piece of DNA as a template.

Then, with the participation of DNA polymerase and nucleotide substrate, the DNA is amplified to a sufficient amount for structural and functional analysis.

Pcr nasal swab test can be said to be very sensitive.

Scientists use PCR technology to amplify a small amount of RNA in the sample into deoxyribonucleic acid (DNA) and replicate it until COVID-19 (if present) is detected.

The following may affect the accuracy of PCR nasal swab sampling.

1. Smoking, drinking or chewing gum 30 minutes before use may also interfere with the test results.

2. Touching the swab with the hand or other objects and using the tip of the cotton swab will affect the accuracy of the detection.

Of course, the professionalism of the most important sampling personnel, we have to choose a professional testing agency for testing. And professional VTM Kits.

What should I do if the new coronary pneumonia nasal swab test is positive?

Very bad news!

If the COVID-19 nucleic acid test is positive, a single room isolation treatment should be carried out immediately.

Consultation by in-hospital experts or attending physicians will conduct multiple tests.

Under the premise of ensuring safety, the patient is safely transferred to a designated hospital for diagnosis and treatment.

Don’t worry. You need to actively cooperate with treatment

Otherwise, life is likely to be in danger, and large-scale infections will also occur.

In addition, proper physical exercise should be carried out in life to enhance the individual’s immunity. Colds and fatigue should be avoided.

Don’t do strenuous exercise, so as not to aggravate the disease.

A friend around me was infected with COVID-19. But my nasopharyngeal swab was negative. Is there any way to confirm that I have had it or am I immune to it now?

Certainly.

Antibody test, also called serological test, can detect the antiviral protein IgM and IgG antibodies produced by your immune system in the blood.

What are the types of samples for serum antibody testing?

It is generally blood, including serum, plasma, and whole blood.

PCR swab test, antibody test, and antigen test difference (Please click here)

 

Flocked Nylon Swabs and Non-Flocked Rayon Swabs

Flocked Nylon Swabs and Non-Flocked Rayon Swabs

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Flocked Nylon Swabs and Non-Flocked Rayon Swabs

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

Type of sampling swab.

1. Polyester fiber, polyester or rayon head, plastic or aluminum handle swab: it is suitable for the collection of virological test specimens. Swabs with wooden handles should not be used for the collection of virological test specimens.

2. Cotton swab: it is suitable for the collection of vaginal, cervical and urethral samples for Mycoplasma test, but not for the collection of bacteria (especially caustic bacteria) and Chlamydia test samples.

3. Polyester swab: suitable for sampling virus and bacterial samples.

4. Flocked swabs: made of nylon fibers by proprietary spray technology, suitable for sampling respiratory viruses and fungal culture samples.

5. Calcium alginate swab: it should be used for the collection of Chlamydia and botulinum pertussis nasopharynx swab. However, it is not suitable for the sampling of lipid coated virus and cell culture, Neisseria gonorrhoeae and Ureaplasma urealyticum.

Specimen Collection Swab.

Why choose flocked material as sampling swab material? What are its characteristics？

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;