Detection and surveillance of viral hemorrhagic septicemia virus using real-time RT-PCR. II. Diagnostic evaluation of two protocols
2014
Two real-time reverse transcription polymerase chain reaction (rRT-PCR) assays under consideration for deployment to multiple testing laboratories across the USA were evalu- ated for diagnostic sensitivity and specificity on tissue homogenates obtained from natural and experimental viral hemorrhagic septicemia (VHS)-infected fish. Estimates for diagnostic speci- ficity using virus isolation as the reference method were similar between laboratories regardless of the assay. Diagnostic sensitivity estimates of 0.96 (95% CI: 0.95, 0.97) for Jonstrup et al. (2013)'s assay (J Fish Dis 36:9�23) exceeded the diagnostic sensitivity of 0.85 (95% CI: 0.83, 0.87) for Phelps et al. (2012)'s assay (J Aquat Anim Health 24:238�243). The Jonstrup rRT-PCR assay is robust as demonstrated by high sensitivity and specificity estimates across laboratories and can be used as a valuable tool for targeted surveillance and for testing of suspect VHSV samples.
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