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EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. Part III. Virus Detection by RT-qPCR
Published on: January 16, 2016
Detection of enterovirus and hepatitis A virus RNA in mussels (Mytilus spp.) by reverse transcriptase-polymerase
1Departamento de Inmunología, Microbiología y Parasitología, Facultad de Farmacia, Universidad del Pais Vasco, Vitoria-Gasteiz, Spain.
Aims:
A simple and effective method of concentrating and purifying enteric viruses from mussel samples to be detected by nucleic acid extraction reverse transcriptase-polymerase chain reaction (RT-PCR) has been evaluated.
Methods And Results:
Seeded mussels were processed by alkaline elution, polyethylene glycol (PEG) precipitation, solvent extraction and PEG precipitation. Final concentrates were assayed by infectivity and RT-PCR after nucleic acid extraction. Two RNA extraction methods were comparatively evaluated for removing inhibitory substances: guanidinium thiocyanate extraction and Purescripttrade mark RNA isolation. Both procedures removed most inhibitors allowing the detection of viral RNA at inoculum levels as low as 4 pfu g(-1) for poliovirus type 1 and 1.8-18 most probable number of cytopathogenic units g(-1) for HAV. When inhibitors remained, they were efficiently removed by Sephadex column chromatography before RNA extraction.
Conclusion:
The described method is effective for the detection of enteric viruses in mussels by RT-PCR. The use of Purescripttrade mark RNA isolation makes the method faster, safer and very easy to perform.
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