Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 400286
Title Mixed-genotype white spot syndrome virus infections of shrimp are inversely correlated with disease outbreaks in ponds
Author(s) Tuyet Hoa, T.T.; Zwart, M.P.; Phuong, N.T.; Oanh, D.T.H.; Jong, M.C.M. de; Vlak, J.M.
Source Journal of General Virology 92 (2011)3. - ISSN 0022-1317 - p. 675 - 680.
Department(s) Laboratory of Virology
Quantitative Veterinary Epidemiology
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) penaeus-japonicus - genetic-variation - deletion mutants - population - virulence - fitness - aquaculture - determines - diversity - selection
Abstract Outbreaks of white spot syndrome virus (WSSV) in shrimp culture and its relation to virus virulence are not well understood. Here we provide evidence that the presence of WSSV mixed-genotype infections correlate with lower outbreak incidence and that disease outbreaks correlate with single-genotype infections. We tested 573 shrimp samples from 81 shrimp ponds in the Mekong delta with outbreak or non-outbreak status. The variable number tandem repeat (VNTR) loci of WSSV were used as molecular markers for the characterization of single- and mixed-genotype infections. The overall prevalence of mixed-genotype WSSV infections was 25.7%. Non-outbreak ponds had a significantly higher frequency of mixed-genotype infections than outbreak ponds for all VNTR loci, both at the individual-shrimp as well as at the pond level. The genetic composition of WSSV populations appears to correlate with the health status of shrimp ponds. The causal relationship between genotypic diversity and virulence can now be experimentally approached.
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