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Journal Article
Research Support, Non-U.S. Gov't
Development of a PCR-based method for the detection of Opisthorchis viverrini in experimentally infected hamsters.
Parasitology 2001 Februrary
Opisthorchis viverrini infection is an endemic disease that causes a serious public health problem in southeast Asia, especially in northeast Thailand. We have developed a PCR method using a pair of primers named OV-6F/OV-6R for detecting O. viverrini eggs in stool samples and compared it with Stoll's egg-count method. The primers were designed based on the pOV-A6 specific DNA probe sequence which gave a 330 base pair product. The PCR method can detect a single egg in artificially inoculated faeces or as little as 2 x 10(-17) ng of O. viverrini genomic DNA. The method gave 100% sensitivity in all hamster groups except in animals exposed to the lowest intensity of infection (1 metacercaria/hamster). In the first month of infection, the PCR method was more sensitive than using the egg-count method in all infected groups especially in the light infections. The PCR method was also successfully used in monitoring a therapeutic study. Since the PCR method showed no cross-reaction with Heterophyid flukes, it can be useful for specific identification of O. viverrini eggs in stool samples without the risk of false positives. It also has great potential for application in clinical epidemiological studies.
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