Ct (cycle threshold) worth signifies the variety of cycles accomplished to determine the virus in a pattern throughout an RT-PCR take a look at. This worth is inversely proportional to the viral load within the pattern — decrease the worth, increased the viral presence.
Final week, the state wrote to the Indian Council of Medical Analysis (ICMR) asking if the Ct worth cut-off will be at 24 (which meant a pattern testing over 24 will be described as damaging). The ICMR responded by saying it can’t be decrease than 35.
Dr Balram Bhargava, director common of ICMR, in a letter to state well being secretary Dr Pradeep Vyas, mentioned a Ct worth of lower than 35 must be thought-about as a Covid-19 constructive case, primarily based