期刊
PREVENTIVE VETERINARY MEDICINE
卷 117, 期 1, 页码 286-294出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.prevetmed.2014.08.007
关键词
White spot syndrome virus; Penaeus monodon; Penaeus vannamei; Pair cohabitation; Transmission rate parameter; Basic reproduction ratio
资金
- RESCOPAR program of Wageningen University
White spot syndrome virus (WSSV), a rod-shaped double-stranded DNA virus, is an infectious agent causing fatal disease in shrimp farming around the globe. Within shrimp populations WSSV is transmitted very fast, however, the modes and dynamics of transmission of this virus are not well understood. In the current study the dynamics of disease transmission of WSSV were investigated in small, closed populations of Penaeus monodon and Penaeus vannamei. Pair cohabitation experiments using PCR as a readout for virus infection were used to estimate transmission parameters for WSSV in these two species. The mortality rate of contact-infected shrimp in P. monodon was higher than the rate in P. vannamei. The transmission rate parameters for WSSV were not different between the two species. The relative contribution of direct and indirect transmission rates of WSSV differed between the two species. For P. vannamei the direct contact transmission rate of WSSV was significantly lower than the indirect environmental transmission rate, but for P. monodon, the opposite was found. The reproduction ratio R-0 for WSSV for these two species of shrimp was estimated to be above one: 2.07 (95%CI 1.53, 2.79) for P. monodon and 1.51 (95%CI 1.12, 2.03) for P. vannamei. The difference in R-0 between the two species is due to a lower host mortality and hence a longer infectious period of WSSV in P. monodon. (C) 2014 The Authors. Published by Elsevier B.V.
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