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Interpretation covid 19 test result

Answered by: Dr Sri Viknarajan

Last Updated: May 8, 2020 5:53 AM

Anonymous 2 months

How do KKM diognose a POSITIVE COVID patient from the laboratory test result? Dr Hisham said, “based on our current guidelines for interpretation of pcr results :
Must have detected E gene (screening target) & RdRp (confirmatory target)
nasopharyngeal swab.”
He futhermore added, “ some kits that are being used by private labs do come with three targets which include the E gene, RdRp and N gene.
So if there are instances where only N is detected & if the Ct value is above 37, we advised to repeat pcr after 48 hr, with freshly collected nasopharyngeal swab”

My question is, if the result came from private hospital only N gene is detected (RdRp and E gene -ve), can the private hospital sent the patient as a positive covid patient to covid hospital without repeating the test? The individiual is asymptomatic,no travelling history, no close contact.

Can N gene detected alone can be diignose as a POSITIVE covid patient? I ve read somewhere, it is presumptive positive.

Thank you for your time. Really appreciate your respond

Dr Sri Viknarajan 2 months
General Practitioner

The following answers regarding your current queries are just general descriptions. Click on this link (DoctorOnCall) for a private consultation with our doctors.

Accroding to Dr Noor Hisham, current guidelines for interpretation of pcr results must have detected E gene (screening target) & RdRp (confirmatory target) nasopharyngeal swab. You may consult a MOH doctor by clicking Ask Doctor at the Ministry of Health website (COVID-19 Portal) to ask any health issues related to COVID-19 starting from 8.30 am to 5.00 pm.

After 5.00 pm till 12.00 am, please direct your enquiries to our DoctorOnCall website at this link

Last Updated: Fri May 08 2020 05:53:21 GMT+0000 (Coordinated Universal Time)
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