Virus Sampling Tubes - Suitable for the collection and transport of virus specimens such as novel coronavirus, influenza virus, avian influenza (e.g. H7N9), hand, foot and mouth virus, measles, etc., as well as mycoplasma, ureaplasma, and chlamydia specimens. Storage and transport of viruses and related samples under refrigeration (2-8°C) within 48 hours. Long-term storage of viruses and related samples in -80°C environment or liquid nitrogen environment.
Sampling method of virus sampling tube to collect virus
1、Press the tongue with the tongue depressor first, then extend the head of the sampling swab into the pharynx to wipe the bilateral pharyngeal tonsils and the posterior pharyngeal wall, swab the posterior pharyngeal wall area with mild force, avoid touching the tongue.
2、Measure the distance from the tip of the nose to the earlobe with a swab and mark it with your finger, insert the sampling swab into the nasal cavity in the direction of vertical nose (face), the swab should reach at least half of the length from the earlobe to the tip of the nose, make the swab stay in the nose for 15-30 seconds, gently rotate it 3-5 times and withdraw the swab.
It is easy to see from the use of the method, whether oropharyngeal swabs or nasopharyngeal swabs, sampling is a technical task, difficult and easy to contaminate, the quality of the collected samples is directly related to the subsequent detection, if the collected samples have a low viral load, it is easy to cause false negatives and difficult to confirm the diagnosis. Some sampling swabs with low viral load, inappropriate fracture points, operators are not easy to break, etc., not only limit the efficiency of sampling, but also easy to cause false negatives in nucleic acid detection. Therefore, the sampling swab head should be flocked with synthetic fibers, should not choose cotton or calcium alginate sponge and other materials; swab handle material recommended to use hollow polystyrene (PS) extruded tube or polypropylene (PP) injection indentation tube, do not use wooden sticks or bamboo sticks and other materials. Because the wood stick or bamboo swab containing calcium alginate and wooden components soaked in preservation fluid after fracture will adsorb protein and even interfere with the subsequent test, the fiber of cotton has stronger adsorption of protein and is not easy to elute; swab length should not be too short, and the fracture position should not be too close to the head of the swab to avoid contamination of the patient's body fluid during operation; the location of the fracture point should be reasonable, with the sampling tube fracture, to avoid the tube The risk of contamination caused by liquid spillage.
Virus sampling tube virus protection can maintain the activity of the virus in a lower temperature range, reducing the rate of virus decomposition and enhancing the positive rate of virus isolation.
