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New PCR probes for detection and genotyping of piscine betanodaviruses

New PCR probes for detection and genotyping of piscine betanodaviruses Betanodaviruses are devastating pathogens affecting more than 32 fish species ( Munday, Kwang & Moody 2002 ; Hegde, Teh, Lam & Sin 2003 ; Nakai, Mori, Sugaya, Nishioka, Mushiake & Yamashita 2009 ), mostly larvae and juveniles in marine warm or cold waters, although outbreaks occasionally occur in fresh water ( Athanassopoulou, Billinis, Psychas & Karipoglou 2003 ; Bigarré, Cabon, Baud, Heimann, Body, Lieffrig & Castric 2009 ). These agents may cause nervous necrosis in tissues such as brain, spinal cord and eyes, leading to abnormal swimming and possibly to death. In another scenario, infected fish may recover or not exhibit any clinical signs and thereafter become healthy carriers which are threats to global trade of live fish ( Castric, Thiery, Jeffroy, de Kinkelin & Raymond 2001 ; Gjessing, Kvellestad, Ottesen & Falk 2009 ). These non‐enveloped viruses have a bipartite positive‐sense genome composed of two RNAs, RNA1 of about 3.1 kb encoding an RNA‐dependent RNA polymerase and RNA2 of about 1.4 kb encoding a capsid protein, the unique structural polypeptide. The existence of an additional subgenomic small RNA (RNA3) potentially encoding two non‐structural proteins has been shown for some betanodaviruses ( Sommerset & Nerland 2004 ; Iwamoto, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Fish Diseases Wiley

New PCR probes for detection and genotyping of piscine betanodaviruses

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References (21)

Publisher
Wiley
Copyright
© 2010 Blackwell Publishing Ltd
ISSN
0140-7775
eISSN
1365-2761
DOI
10.1111/j.1365-2761.2010.01188.x
Publisher site
See Article on Publisher Site

Abstract

Betanodaviruses are devastating pathogens affecting more than 32 fish species ( Munday, Kwang & Moody 2002 ; Hegde, Teh, Lam & Sin 2003 ; Nakai, Mori, Sugaya, Nishioka, Mushiake & Yamashita 2009 ), mostly larvae and juveniles in marine warm or cold waters, although outbreaks occasionally occur in fresh water ( Athanassopoulou, Billinis, Psychas & Karipoglou 2003 ; Bigarré, Cabon, Baud, Heimann, Body, Lieffrig & Castric 2009 ). These agents may cause nervous necrosis in tissues such as brain, spinal cord and eyes, leading to abnormal swimming and possibly to death. In another scenario, infected fish may recover or not exhibit any clinical signs and thereafter become healthy carriers which are threats to global trade of live fish ( Castric, Thiery, Jeffroy, de Kinkelin & Raymond 2001 ; Gjessing, Kvellestad, Ottesen & Falk 2009 ). These non‐enveloped viruses have a bipartite positive‐sense genome composed of two RNAs, RNA1 of about 3.1 kb encoding an RNA‐dependent RNA polymerase and RNA2 of about 1.4 kb encoding a capsid protein, the unique structural polypeptide. The existence of an additional subgenomic small RNA (RNA3) potentially encoding two non‐structural proteins has been shown for some betanodaviruses ( Sommerset & Nerland 2004 ; Iwamoto,

Journal

Journal of Fish DiseasesWiley

Published: Nov 1, 2010

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