When the epidemic is waiting for an opportunity again, to quickly control the spread of the virus, nucleic acid testing has become the only way to go, and it has also attracted attention from all walks of life. However, there are many factors that affect the results of nucleic acid testing, including sample collection location, collection method, storage and transportation process, nucleic acid extraction operation, and so on. Among them, the stability of the sample is a key link. How to quickly inactivate the virus and protect the viral nucleic acid from being degraded, maintaining the stability of the virus sample storage solution has become a top priority. Step 1: Break the shell and eliminate the "combat power" Like other RNA viruses, the results of the new coronavirus are simply composed of a protein shell wrapped in single-stranded nucleic acid-RNA. We can simply think of the RNA of the virus as the "brain" that gives orders, and the protein is the "limbs" that execute orders. The new coronavirus infects the human body and reproduces and causes symptoms. This process is mainly completed by the biologically active protein structure outside the virus. The inactivated virus preservation solution is mainly the virus modified by the nucleic acid extraction lysis solution; it is a powerful protein denaturant that can quickly dissolve the protein and cause the virus structure to be broken. When the clinical sample with the new coronavirus is mixed with the preservation solution, the virus in the sample is affected by the lysis solution, and the protein shell is quickly destroyed, and this damage is irreversible. At this time, the virus has lost its evil "minions" and no longer has the ability to infect people, thus ensuring the safety of contacts during sample transportation and processing. Step 2: Inhibit enzyme activity and escort the "ID card" After the shell is lysed, the RNA of the new coronavirus is free in the preservation solution. As a single-stranded macromolecule, the stability of RNA is not as immobile as double-stranded DNA. The RNase that exists everywhere in the natural environment is the culprit that causes RNA to hydrolyze and break. Therefore, it is generally considered that the viral RNA that has lost its outer shell protection is In addition to the inactivated virus storage solution, the virus preservation solution produced by Desheng also has a non-inactivated virus storage solution. It retains the protein coat of the virus and the viral nucleic acid DNA or RNA at the same time, so that the virus has the integrity of the protein epitope and nucleic acid in vitro. Of course, there is a certain risk of infectivity when operating errors. Long-term storage after sampling needs to keep strictly low temperature. Regardless of the virus preservation solution, we need to strictly operate, store or transport in accordance with the requirements when using it.
With the recurrence of asymptomatic, nucleic acid testing cannot be stopped for a moment. This is not only a protection for everyone, but also a protection for yourself. Speaking of nucleic acid testing, we have to bring up our virus sampling tube again. Its choice also plays a key role. Why use a virus sampling tube? Virus detection is different from conventional biochemical detection. The virus itself is a simple microorganism that must be parasitic in living cells. After sampling, the virus leaves the host cell, and its protein shell and nucleic acid will be quickly degraded in the sampling tube, so the nucleic acid During the test, it is impossible to determine whether the initially collected sample contains the virus, and it is easy to cause false negatives. What are the requirements for an excellent virus sampling tube? 1. In terms of sample effectiveness: The non-inactivated virus preservation solution must maintain the activity of the pathogen's infectious agent. Preferably, it can preserve the activity of the virus at room temperature. The inactivated virus preservation solution needs to inactivate the virus but maintain the nucleic acid of the virus to meet the time from sample sampling to laboratory testing. It is necessary to limit and prevent the reproduction of symbiotic microorganisms to ensure the reliability of diagnostic tests. 2. In terms of safety: Because the virus sampling tubes are basically all infectious substances, and some are highly pathogenic infectious substances, the requirements for packaging containers are very strict, and they need to meet safety and ensure that liquids do not leak during transportation. . So what is the virus preservation solution? Under what circumstances do I need to use a virus preservation solution? The virus preservation solution is a protective liquid medium added to the virus sampling tube to protect the sample after the nasopharyngeal swab is sampled. Normally, nucleic acid PCR cannot be directly performed at the sample collection site during nucleic acid detection. If the sample collected by the swab needs to be transferred and transported, it is necessary to add a virus preservation solution. Why is the virus preservation solution divided into inactivated and non-inactivated? After the virus samples are collected, there is usually no way to test in time at the sample sampling site, so the collected virus swab samples need to be transported, and the virus itself will be quickly lysed outside the body and affect subsequent testing, so when storing and transporting , You need to add a virus preservation solution. For different detection purposes, you need to use different virus preservation solutions and different virus detection experimental conditions, so it is divided into two types of preservation solutions, inactivated and non-inactivated. There are no other microorganisms, causing the virus to decompose after sampling or other influences causing false detections.
CORONAVIRUS (SARS COV-2) ANTIGEN DETECTION KIT - Price 2.99 USD ONLY FOB Netherlands Remaining Qty: 60,000 pcs
Manufacturer: Shanghai LiangRun Biomedicine Technology Co.,Ltd. Certificates: CE(EU), MHRA(UK), HSA(Singapore), MDA(Malaysia), TSE(Turkey), DIGEMID(Peru), Luxus Medical(Germany) , FDA(US), EUA(US, Registering) FOB: 10m, 4.5usd
Choice of nasopharyngeal swab: The main indicators of clinical evaluation of swab performance are the absorption capacity and release capacity of the swab to the target sample at the sampling site. Nylon flocking swabs are made of fine nylon fibers adhered to a plastic rod. Compared with traditional cotton swabs, the adsorption surface is significantly larger, which is conducive to the adhesion and release of pathogenic microorganisms. The ability of nylon flocking swabs and traditional rayon cotton swabs to recover and release known microbial inoculums (spiked samples) confirms that nylon flocking swabs have the ability to release cells, microorganisms, viruses and other microorganisms Significant advantages. Compared with traditional rayon cotton, nylon flocking swabs or foam swabs have a significant advantage in the virus recovery rate in the screening of nasal cavity carrying MRSA virus. For the choice of virus preservation solution: non-inactivated preservation solution and inactivated preservation solution.
Covid Antigen Ag swab rapid test card, Sensitivity: 96.17%; Specificity: >99.9%; Accuracy: 98.79% Big quantity, low price is available.
Antigen Rapid Covid-19 Test Kit Medakit. Rapid diagnosis tests for Covid-19 infections (10 minutes). Cassette 40 test/kit. Main compound from Germany, assembly in China. Certifications : FDA - MOFCOM - CE - ANVISA - TGA - ISO13485 - ISP - CNR (Institut Pasteur)
NanoCare COVID-19 Antigen (Ag) Kit is a rapid chromatographic immunoassay for the qualitative detection of specific antigens to SARS-CoV-2 present in human nasopharynx.
The iNSTAXPORT Viral Transport Medium is a specially designed transport system for collection, transport, maintenance and long term freeze storage of clinical specimens containing viruses in active form, including COVID-19. SALIENT FEATURES -Phenol red indicator to check medium integrity -Contains Cryoprotectants to ensure viability of organisms while freezing -Standards complied: CDC and WHO -CE marked -ICMR validated and approved -Suitable for throat as well as nasal swab samples -Can be stored at room temperature, prior to collection -Shelf life: 24 months
The iNSTAXPLOR COVID-19 Ag is a rapid chromatographic immunoassay for the qualitative detection of antigens specific to SARS-CoV-2 in swab samples collected from a human nasopharynx. SALIENT FEATURES -Best suited for early detection of COVID â?? 19 infection from the onset of symptoms -Point-of-care test / On the spot test -Quick results in 15 to 30 mins -ICMR validated and approved -No Equipment required - All Material provided in the Kit to perform the test -Recommended for administration by qualified healthcare workers -Storage at Room Temperature (2-30C). -Shelf life: 24 months
Product Details: Usage/Application Hospital Time To Result 5-10 min SD BIOLINE Strep A rapid test is a chromatographic immunoassay for the qualitative detection of group A streptococcal antigens directly from throat swabs or confirmation of presumptive Group A Streptococcal colonies recovered from culture. Detection of strep-A antigen directly from throat swab Easy to use: throat swab sample Optimal test for Group A streptococcal infection. Ordering Information Cat No. Description Specimen Pack Size 45FK12 Strep A Group A Throat swab 25 Tests Streptococcal Ag
Covid Antigen Ag saliva rapid test card, Sensitivity: 97.1% Specificity: 99% Agreement: 99.57% 10 miuntes to get the result. MOQ for each: 500 tests, 20 tests/box,
COVID-19 TESTING KIT title Sample Collection And Preparation. Keep The Kit And Sample To Room Temperature Prior To Testing. Add Sample ( 20 Ul Pf Serum/Plasma/Whole Blood ) To The Sample Well By Using A Micropipette/Dropper. Add Buffer ( 1 Drop For Serum/Plasma Or 3 Drop For Whole Blood ) To The Sample Well Immediately. Wait For The Colored Lines(S) To Appear And Read The Result At 10 Minutes. The Result Is Valid Within 20 Minutes.
The KAiRA 2019-nCoV PCR Detection Kit is a one step RT-PCR reagent system, based on real-time PCR technology, for the qualitative detection and differentiation of lineage B-beta Coronavirus and severe acute respiratory syndrome coronavirus 2 specific RNA. The test kit has FDA and CE Approval and comes in packs of 100 tests. In combination with Dr PCR the test results for PCR Testing can be given in under an hour and are compatible for use for international travel requirements. Unit - Kit (1 kit contains 100 tests) Unit Price - $900 per kit
Diagnostic kits.
Malaria P.f /P.f,P.v / P.f,P.v,P.o,P.m Rapid Test Antige (Uncut Sheet) Specimen: Whole Blood/Serum/Plasma Format:2.5mm 3.0mm 4.0mm Accuracy:99.8% Cut-off:200 parasites/uL Sensitivity:98.6% Specificity:99.8% Package: in bulk or unit box package for your options Delivery date:7-10 days after receipt of the payment Pouch design: white pouch / netrual/ OEM design/CE Marked Payment:Westren Union,T/T
Covid 19 Rapid Antigen Test Kits
- Product: Covid19 self test kit - Origin: Korea - Payment: CIF, FOB
Cat.No - TO-CO-E0006 Size - 50T Price - 20475
Cat.No - TO-CO-E0001 Size - 50T Price - 20475
