The Thai Journal of Veterinary Medicine


Twenty-seven male and 26 female roundworms were recovered from the stomach of Dugong dugon from Trang Province, Southern Thailand. The worms were kept in 70% alcohol and transported to the Department of Helminthology for study. The worm has three lips with interlabia, intestinal caecum and ventriculus. The male worm presents two spicules alate in the middle shaft, four pairs of precloacal papillae, two pairs of paracloacals and two pairs of postcloacal papillae. After comparison with specimens borrowed from Queensland Museum, the nematode was ascertained to be Paradujardinia halicoris.

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