Publication:
Mud crab susceptibility to disease from white spot syndrome virus is species-dependent

dc.contributor.authorNaraporn Somboonnaen_US
dc.contributor.authorSeksan Mangkalananen_US
dc.contributor.authorAttasit Udompetcharapornen_US
dc.contributor.authorChartchai Krittanaien_US
dc.contributor.authorKallaya Sritunyalucksanaen_US
dc.contributor.authorTW Flegelen_US
dc.contributor.otherMahidol University. Center of Excellence for Shrimp Molecular Biology and Biotechnologyen_US
dc.contributor.otherMahidol University. Institute of Molecular Biosciencesen_US
dc.contributor.otherMahidol University. Faculty of Science. Department of Biochemistryen_US
dc.date.accessioned2015-08-10T10:26:26Z
dc.date.accessioned2017-04-25T03:40:57Z
dc.date.available2015-08-10T10:26:26Z
dc.date.available2017-04-25T03:40:57Z
dc.date.created2015-08-10
dc.date.issued2010
dc.description.abstractBackground Based on a report for one species (Scylla serrata), it is widely believed that mud crabs are relatively resistant to disease caused by white spot syndrome virus (WSSV). We tested this hypothesis by determining the degree of susceptibility in two species of mud crabs, Scylla olivacea and Scylla paramamosain, both of which were identified by mitochondrial 16 S ribosomal gene analysis. We compared single-dose and serial-dose WSSV challenges on S. olivacea and S. paramamosain. Findings In a preliminary test using S. olivacea alone, a dose of 1 × 106 WSSV copies/g gave 100% mortality within 7 days. In a subsequent test, 17 S. olivacea and 13 S. paramamosain were divided into test and control groups for challenge with WSSV at 5 incremental, biweekly doses starting from 1 × 104 and ending at 5 × 106 copies/g. For 11 S. olivacea challenged, 3 specimens died at doses between 1 × 105 and 5 × 105 copies/g and none died for 2 weeks after the subsequent dose (1 × 106 copies/g) that was lethal within 7 days in the preliminary test. However, after the final challenge on day 56 (5 × 106 copies/g), the remaining 7 of 11 S. olivacea (63.64%) died within 2 weeks. There was no mortality in the buffer-injected control crabs. For 9 S. paramamosain challenged in the same way, 5 (55.56%) died after challenge doses between 1 × 104 and 5 × 105 copies/g, and none died for 2 weeks after the challenge dose of 1 × 106 copies/g. After the final challenge (5 × 106 copies/g) on day 56, no S. paramamosain died during 2 weeks after the challenge, and 2 of 9 WSSV-infected S. paramamosain (22.22%) remained alive together with the control crabs until the end of the test on day 106. Viral loads in these survivors were low when compared to those in the moribund crabs. Conclusions S. olivacea and S. paramamosain show wide variation in response to challenge with WSSV. S. olivacea and S. paramamosain are susceptible to white spot disease, and S. olivacea is more susceptible than S. paramamosain. Based on our single-challenge and serial challenge results, and on previous published work showing that S. serrata is relatively unaffected by WSSV infection, we propose that susceptibility to white spot disease in the genus Scylla is species-dependent and may also be dose-history dependent. In practical terms for shrimp farmers, it means that S. olivacea and S. paramamosain may pose less threat as WSSV carriers than S. serrata. For crab farmers, our results suggest that rearing of S. serrata would be a better choice than S. paramamosain or S. olivacea in terms of avoiding losses from seasonal outbreaks of white spot disease.en_US
dc.identifier.citationBMC Researcn Notes. Vol.3, No.315 (2010), 1-12en_US
dc.identifier.doi10.1186/1756-0500-3-315
dc.identifier.urihttps://repository.li.mahidol.ac.th/handle/20.500.14594/1834
dc.language.isoengen_US
dc.rightsMahidol Universityen_US
dc.subjectMud crab susceptibilityen_US
dc.subjectwhite spot syndrome virusen_US
dc.subjectvirusen_US
dc.subjectspecies-dependenten_US
dc.subjectOpen Access articleen_US
dc.titleMud crab susceptibility to disease from white spot syndrome virus is species-dependenten_US
dc.typeArticleen_US
dcterms.dateAccepted2010-11-20
dspace.entity.typePublication
mods.location.urlhttp://www.biomedcentral.com/1756-0500/3/315/

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