Covid-19: Delayed testing, poor collection of swabs behind false negatives | India News – Times of India

MUMBAI: As the second wave of the pandemic intensifies, medical doctors say there’s a group of sufferers who regardless of displaying basic Covid-19 signs is testing damaging for the SARS-CoV-2 virus. The causes vary from poor collection of swab samples, delayed testing after the looks of the primary signs or variants which have probably modified the illness patterns.
Dr Pratit Samdhani from the state-run JJ Hospital, Byculla, mentioned there are undoubtedly some sufferers who should not testing constructive regardless of having signs corresponding to fever, cough and physique ache. “If the virus isn’t tested in the third to seventh day after the first symptoms appear, there is a higher chance of false negative,” mentioned a physician with a BMC hospital.
However, not all sufferers are clear about after they began getting signs: some get one-day fever adopted by extreme cough whereas others start with blocked nostril.
Infectious ailments specialist Dr Om Shrivastava from Jaslok Hospital mentioned one of the explanations for the false damaging may very well be the truth that the RT-PCR check, which is taken into account one of the best to detect the SARS-CoV-2 virus, has a sensitivity between 65 and 70%.
“Tests are not 100% positive, but just because a test is unable to pick up the virus, one cannot exclude the infection. Doctors have to rely on their clinical judgement,” he mentioned.
At such occasions, medical doctors need to depend upon the CT scan of the chest to ascertain the prognosis. The Covid lung has a particular glassy look that can’t be missed, mentioned Samdhani.

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