H6: investigation summary: the complaint investigation for discrepant results when using the bd max enteric viral panel assay (ref.443985) lot 3137907 was performed by the review of manufacturing records, analysis of the customer¿s data and verification of complaints history.Review of the manufacturing records of the bd max enteric viral panel indicated that the lot was manufactured according to specifications and met performance requirements.Customer complained about one suspected false positive result for the norovirus target.According to details in the complaint text, the amplification curve is not sigmoidal and does not correspond to a ct value of 24.9.Customer provided two run files (# 111 and 113) from instrument ct2666 for investigation.Run 111 did not contain any positive result.In run 113, the sample in position a8 was positive for rotavirus, sapovirus and norovirus.However, the customer questioned the norovirus positive result.Manual pcr curve adjudication was performed.The pcr curve pattern for this target showed a step dislocation in the raw pcr signal of the rox top channel (norovirus target, nov), resulting in a nov positive result.It is unlikely that this step dislocation is due to true amplification and a root cause could not be identified.Nevertheless, it must be noted that manual curve adjudication has limitations; visual examination of pcr curves for aberrant curve geometry is a conservative assessment of the data.There is no indication of a reagent issue based on the analysis of the complaints received for discrepant results on bd max enteric viral panel lot 3137907.The root cause was not identified.Bd cannot confirm the complaint based on the investigation that was performed.
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