- Evaluation of the Sensitivity and Specificity of Primer Pairs and the Efficiency of RNA Extraction Procedures to Improve Noroviral Detection from Oysters by Nested Reverse Transcription-Polymerase Chain Reaction
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Cheonghoon Lee , Sooryun Cheong , Hee-Jung Lee , Miye Kwon , Ilnam Kang , Eun-Gyoung Oh , Hong-Sik Yu , Soon-Bum Shin , Sang-Jong Kim
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J. Microbiol. 2010;48(5):586-593. Published online November 3, 2010
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DOI: https://doi.org/10.1007/s12275-010-0047-4
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Noroviruses (NoV) are the key cause of acute epidemic gastroenteritis, and oysters harvested from NoVpolluted sea areas are considered as the significant vectors of viral transmission. To improve NoV detection from oyster using nested reverse transcription-polymerase chain reaction (RT-PCR), we evaluated the sensitivity and specificity of previously published primer pairs and the efficiency of different RNA extraction procedures. Among the primer pairs used for RT-PCR, the sensitivity of GIF1/GIR1-GIF2/GIR1 and GIIF1/GIIR1-GIIF2/GIIR1 was higher than that of other primer pairs used in nested RT-PCR for the detection of NoV genogroup I (NoV GI) and NoV GII from both NoV-positive stool suspension and NoVseeded oyster concentrates, respectively; the resulting products showed neither unspecific bands in the positive samples nor false-positive bands in the negative controls. The extraction of NoV RNA from oyster samples using a QIAamp? Viral RNA Mini kit with a QIAshredderTM Homogenizer pretreatment afforded more efficient recovery (mean recovery for NoV GI and GII, 6.4%) and the procedure was less time consuming (<30 min) than most other RNA extraction procedures. The results of RNA extraction procedure and primer pairs evaluated by nested RT-PCR assay in this study can be useful for monitoring NoV contamination in oysters, which is an indicator of possible public health risks.
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Citations
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