The green toad, Bufo variabilis has been a common species of toads in Iran with a wide
distribution in most provinces. The main goal of this study was to determine the helminth parasite
fauna of B. variabilis in southwest of Iran. Among 30 toads inspected for helminth infection from
different sites, 100% harbored one or more parasite species. Some toads were afflicted by intestinal
obstruction, due to the infection with a large number of cestodes. Twenty-eight cases (93%) had
mixed infection with cestodes (in intestine) and nematodes (in lung). Also, a toad was infected with
a single monogenean parasite in its urinary bladder. The identified helminth parasites were
monogenean, Polystoma viridis; cestode, Nematotaenia dispar and a species of nematode, Rhabdias
ranae. This study reports for the first time the presence of nematode species R. ranae in B. variabilis
in Iran.
