Journal
DISEASES OF AQUATIC ORGANISMS
Volume 88, Issue 2, Pages 157-160Publisher
INTER-RESEARCH
DOI: 10.3354/dao02131
Keywords
Belize variant; Taura syndrome virus; Immune response; Hyperthemia; Penaeus vannamei; Shrimp
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Funding
- Cooperative State Research, Education and Extension Service [2004-38808-02142]
- US Department of Agriculture
- National Fisheries Institute
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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 degrees C). Shrimp exposed to the reference Hawaii-94 isolate of TSV (TSV-HI) showed resistance to infection at. 32 degrees C as demonstrated by the absence of mortality, histopathological lesions and decreased viral load by qPCR. However, at 32 degrees 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.
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