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Appl. Environ. Microbiol., Dec 1995, 4418-4424, Vol 61, No. 12
DN Lees, K Henshilwood, J Green, CI Gallimore and DW Brown
We describe the application of a previously developed sample extraction
procedure to the detection of small round structured viruses (SRSVs) in
shellfish. Initial seeding experiments showed that PCR inhibitor removal
and virus recoveries were comparable to those in previous studies with
poliovirus. Shellfish from a range of sewage-contaminated sites were then
tested for the presence of SRSVs by using broadly reactive PCR primers
followed by Southern blotting with internal probe sites. Positive results
were obtained from 5 of 31 field samples tested. Four of these positive
samples were from highly polluted sites. PCR product sequence analysis
confirmed their identity as SRSV and showed sequence diversity compared
with virus controls, suggesting that the results were not a consequence of
PCR cross-contamination. Finally, shellfish associated with four separate
outbreaks of viral gastroenteritis were tested by PCR and Southern blot for
the presence of SRSVs. All outbreak samples tested gave positive results.
As far as we are aware, this is the first demonstration of the detection in
environmentally contaminated shellfish of the SRSVs responsible for human
gastroenteritis. This development may help contribute to the further
development of public health controls for molluscan shellfish.
Copyright © 1995, American Society for Microbiology
Detection of small round structured viruses in shellfish by reverse transcription-PCR
Fish Diseases Laboratory, Ministry of Agriculture, Fisheries and Food, Weymouth, Dorset, United Kingdom.
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