A new intestinal fluke, Plagiorchis harinasutai n.sp.

Dilution-sedimentation examination of stool specimens from four opisthorchiasis patients treated with praziquantel led to the discovery of six Plagiorchis worms. This is the first known report of plagiorchis infection in man in Thailand. The morphological features differed from those of previously described Plagiorchis species indicating that these worms belong to a new species, which we designated as Plagiorchis harinasutai n.sp. in honour of Professor Chamlong Harinasuta, former Dean of the Faculty of Tropical Medicine, Mahidol University, Bangkok. The holotype is held at the Museum and Reference Centre. Paratypes are held in the Bangkok School of Tropical Medicine, Faculty of Tropical Medicine, Mahidol University.