Opisthorchis viverrini: Detection by polymerase chain reaction (PCR) in human stool samples
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A polymerase chain reaction (PCR) assay was evaluated for detection of Opisthorchis viverrini eggs in the stool specimens of light and heavily infected individuals in Khon Kaen province of Thailand. A total of 75 fecal specimens were analyzed by PCR following DNA extraction. All the microscopically positive samples were positive by PCR, while 23 of 30 (76.6%) microscopically negative samples were also PCR positive. The sensitivity of the assay was 5 eggs/g of stool. This method is potentially useful in the diagnosis of human opisthorchiasis in endemic areas for treatment and in epidemiological investigations.
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