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EPIDEMIOLOGY ANALYSIS OF HEMATODINIUM sp.DISEASE IN SCYLLA PARAMAMOSAIN
Author(s): 
Pages: 595-601
Year: Issue:  3
Journal: Oceanologia et Limnologia Sinica

Keyword:  Scylla paramamosainHematodinium sp.epidemiology;
Abstract: This study reports clinical and epidemiological characteristics of Hematodinium sp.infection in swimming crab Scylla paramamosain populations in Wenzhou,China,between April and November in three years(2010—2012).The infection in the crabs was detected by both species-specific PCR and microscopic examination.Epidemiological data show that the infection occurred between May and November,and the prevalence of infection was higher in summer time and peaked in August.The prevalence was positively correlated with temperature(r=0.756) and salinity(r=0.631).This trend was similar year to year.In addition,our data show that the infections occurred in all sizes and life stages of the crabs.Juvenile crabs in body weights <50g and adults >250g,and moult-stage crabs were found more susceptible to Hematodinium sp.infection.The study suggests risk of Hematodinium sp.infection in swimming crab is high in hot months as heavy rain or tropical storm may result in sharp changes in water temperature and salinity,to which preventative measure shall be made.
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