Disposable virus sampling tube main purpose
Disposable virus sampling tubes are used for the collection of viral specimens of novel coronaviruses, influenza viruses, avian influenza (e.g. H7N9), hand, foot and mouth viruses, measles, etc., as well as the transport of mycoplasma, ureaplasma, and chlamydia specimens.
Viruses and related samples are stored and transported under refrigerated (2-8°C) conditions within 48 hours. Virus and related samples are stored for long periods at -80°C or in liquid nitrogen. Therefore, the use of disposable virus sampling tubes is very important.
The virus preservation solution consists mainly of: s liquid base, gentamicin, fungal antibiotics, biological buffers and amino acids. It can maintain the activity of virus in a wide temperature range, reduce the rate of virus decomposition and improve the positive rate of virus isolation.
COVID-19 nucleic acid test positive rate of low disposable virus sampling tube application sample collection session
Do clinicians have trouble with this? The patient is highly suspicious of novel coronavirus pneumonia, but the swab nucleic acid tests are negative, now what to do? Or perhaps two swab tests are negative, but many people around him who have been in contact with him have been diagnosed. Is he really negative? Or is it a false negative? How do I collect a specimen to improve accuracy?
Collection sites for the use of disposable viral sampling tubes
In the WHO 2019 Novel Coronavirus Guidelines, it is recommended that both upper respiratory specimens (nasopharynx and oropharynx) and lower respiratory specimens (sputum, tracheal aspirate, or bronchoalveolar lavage) be collected when using disposable viral sampling tubes; when lower respiratory specimens are readily available (e.g., mechanical ventilation), only lower respiratory specimens should be collected.
How to select upper respiratory swabs for patients with mild cough or no cough sputum? For influenza testing, the 2018 IDSA Guidelines for the Diagnosis, Treatment, Prevention, and Outbreak Management of Seasonal Influenza recommend nasopharyngeal swabs over other upper respiratory tract specimens. Are nasopharyngeal swabs good for new coronavirus swab collection? The use of nasopharyngeal swabs is also recommended in the newly released "Pneumonia Treatment Protocol for Novel Coronavirus Infection (Trial Version 5)".
Note on the use of disposable virus sampling tubes.
× Do not take samples from the nostrils or tonsils
× Nebulized sputum is not recommended
√ Lower respiratory specimens (compared with upper respiratory specimens) are more likely to be positive [ h] √ In patients with suspected novel coronavirus infection, especially in pneumonia or severe disease, a single upper respiratory specimen cannot exclude the diagnosis. Additional upper and lower respiratory tract specimens are recommended.
Swab collection and delivery media
Flocked swabs facilitate the collection and release of novel coronaviruses and are superior to conventional fiber swabs. The use of flocked swab collection is strongly recommended to increase positive nucleic acid testing for new coronaviruses
