Pleurolophocercous cercariae found in the invasive gastropod Melanoides tuberculata (Müller, 1774) collected in a stream of the Vila do Abraão, Ilha Grande, Angra dos Reis, Rio de Janeiro, Brazil were used for experimental infection that enabled the identification of the heterophyid trematode Centrocestus formosanus (Nishigori, 1924). The parasite has been found in the locality since 2007, afte...

In the present study, we review the known zoogonid cercariae, summarise their life-cycles and first intermediate host distributions, and present a new cercaria, Cercaria capricornia XI (Digenea: Zoogonidae), which was found in one of three nassariid gastropods, Nassarius olivaceus (Bruguière), surveyed in the intertidal zone in the Capricornia region of Central Queensland, Australia. Morphologi...

SUMMARY Studies were made of the germinal development in the mother and daughter sporocysts of C. elephantis in experimental infections *of the snail intermediate host. A few infections of another species with a much larger cercaria also developed in the experimentally infected snails . Very rapid multiplication of the germinal cells takes place in the early stages of the mother sporocysts and ...

We report an exceptionally high rate of infection by Haplorchis taichui (Nishigori, 1924) in human populations on Mindanao Island, southern Philippines. This intestinal fluke is seldom encountered, and this is the first report of high prevalence of infection (36%) in humans by H. taichui in the Philippines. The likely source of haplorchine infection has been linked to consumption of raw or unde...

Schistosoma spindale (Montgomery, 1906) has never been reported in Thailand, since this worm was discovered by Montgomery (1906) in two plain cattle (Bos indices) at Muktesar in India. Liston and Soparkar (1918) completed its life cycle in the goat infected with one kind of furcocercous cercariae obtained from a fresh water snail, Planorbis exustus (synonym of Indoplanorbis exustus). In 1960 an...

Incidence S. nasale (causative agent of nasal schistosomiasis) in graded murrah buffaloes was studied. 4(8%) among healthy and 46(92%) among suspected buffaloes were diagnosed with nasal schistosomiasis. Area under investigation was highly irrigated giving ample scope for exposure of animals to cercaria of S. nasale. Buffaloes showing signs of reduced water intake, reduced milk yield, normal bo...

The cercaria of Bucephalopsis haimeanus (Lacaze-Duthiere), a digenic trematode, parasitic on the edible oyster Crassostrea madrasensis (Preston) from Karapad oyster farm at Tuticorin is reported. The cercaria belongs to Gasterostome type having forked caudal rami. The morphology of the parasite is described, and the effect of parasitism, namely, sterility and change in flesh weight in the oyste...