Prevalence of Opisthorchis viverrini infection in intermediate hosts in Hua Na Dam Area, Sisaket Province: 2014

Abstract

The objective of this cross-sectional study was to determine prevalence of Opisthorchis viverrini (O. viverrini) infection in intermediate hosts in Cyprinoid fish and snails, in Hua Na Dam, Sisaket Province. Data were collected in September 2014. Nine species of snails were collected from 13 predetermined locations; totally of 2,948 snails, which were identified cercariae infection by cercarial shedding method using stereo microscope. The results showed no O. viverrini infection, whilst 17.20% of the samples were infected by intestinal flukes, 1.00% Echinostoma spp. and 1.10% Schistosoma spindale. Fifteen species of Cyprinoid fish; totally of 225 samples, were collected and identified metacercariae infection by crushing fish flesh with plexiglas and using stereo microscope. The results showed that 12.60% and 1.80% of the samples were infected by intestinal flukes and O. viverrini; respectively. The highest infection rate was found in Puntiusbrevis, 43.10% from intestinal flukes and 3.90% from Like O. viverrini This study showed that there were intestinal flukes and O. viverrini infections in Cyprinoid fish. For snails, the study found only intestinal flukes infection. Therefore the public health of authorities should beware of this situations and gave education to the public not to consume raw fish as well as raw snail.