DAO 88:157-160 (2010)  -  DOI: https://doi.org/10.3354/dao02131

NOTE
Hyperthermia does not protect Kona stock Penaeus vannamei against infection by a Taura syndrome virus isolate from Belize

Isabelle Côté1,2,*, Donald V. Lightner1

1Aquaculture Pathology Laboratory, Department of Veterinary Science and Microbiology, University of Arizona, 1117 East Lowell Street, Tucson, Arizona 85721, USA
2Present address: Laboratoire d’expertises enpathologie animale du Québec, Ministère de l’agriculture, des pêcheries et de l’alimentation du Québec, 2700 rue Einstein, Sainte Foy, Québec G1P 3W8, Canada

ABSTRACT: This study evaluated the susceptibility of Penaeus vannamei, Kona stock-line, to infection by an isolate of Taura syndrome virus from Belize (TSV-BZ) under hyperthermic conditions (32°C). Shrimp exposed to the reference Hawaii-94 isolate of TSV (TSV-HI) showed resistance to infection at 32°C as demonstrated by the absence of mortality, histopathological lesions and decreased viral load by qPCR. However, at 32°C, shrimp were fully susceptible to the disease caused by TSV-BZ, exhibiting high mortality, severe histopathological lesions and increased viral load. This susceptibility of shrimp to TSV-BZ infection under hyperthermic conditions was independent of the route of infection (injection vs. per os) and the salinity of the water (11 vs. 28). TSV-BZ might be a temperature-permissible mutant of TSV.


KEY WORDS: Belize variant · Taura syndrome virus · Immune response · Hyperthemia · Penaeus vannamei · Shrimp


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Cite this article as: Côté I, Lightner DV (2010) Hyperthermia does not protect Kona stock Penaeus vannamei against infection by a Taura syndrome virus isolate from Belize. Dis Aquat Org 88:157-160. https://doi.org/10.3354/dao02131

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