Trematode parasites are integral components of intertidal ecosystems which experience high levels of ultraviolet radiation. Although these parasites mostly live within hosts, their life cycle involves free-living larval transmission stages such as cercariae which are directly exposed to ambient conditions. UV has previously been shown to considerably reduce the survival of cercariae. Here, we i...

In aquatic ecosystems, dense populations of snails can shed millions of digenean trematode cercariae every day. These short-lived, free-living larvae are rich in energy and present a potential resource for consumers. We investigated whether estuarine fishes eat cercariae shed by trematodes of the estuarine snail Cerithidea californica. In aquaria we presented cercariae from 10 native trematode ...

The effects of glucose in artificial spring water (ASW) on the survival, infectivity, and linear movement of Echinostoma caproni cercariae were studied. Cercariae maintained at 23 degrees C in 1% glucose in ASW (ASWG) or ASW alone, reached 50% survival at 26 and 23 h, respectively. All cercariae in ASWG and ASW were dead by 50 and 32 h, respectively. Infectivity to juvenile Helisoma trivolvis (...

Cercariae capricornia I–VI, six new cercariae putatively identified as belonging to the Acanthocolpidae, are described and named from prosobranch gastropods of the family Nassariidae collected from the intertidal zone in the Capricornia region, Central Queensland, Australia. Four species are reported from Nassarius olivaceus and two from N. dorsatus. The cercariae have a unique and complex thre...

The hot-spots of transmission food-borne zoonotic trematodes in northern Vietnam have been known as the integrated fish-livestock (VAC- Garden, Fish pond, Poultry shed) ponds. A cross-sectional study was conducted Ha Noi capital and Yen Bai province to investigate trematode larval infections (cercariae) freshwater snails these areas. Snails were collected from 35 VAC ponds, including 25 grow-ou...

In the present work, scanning electron microscopical studies on Schistosoma mansoni cercariae exposed to ultraviolet irradiation (UV-irradiation) were done to answer the question: Is the damage inflicted seen on the adult schistosome worms developed from irradiated cercariae, due to direct effect of UV-irradiation on cercariae or due to the host's immunogenicity induced by UVirradiated cercaria...

background: to determine the morphological specifications of the bird schistosomes cercaria from lymnaea gedrosiana and to detect the surface carbohydrates as receptors for host lectins in the host-parasite relationship systems such as avian schistosomiasis and human cercarial dermatitis. methods: one hundred ninety two snails collected from dezful areas in khuzestan province, in the south west...

limited studies have been made on the cercariae from freshwater snails in iran. this study was conducted to determine the cercariae fauna of bellamya (viviparus) bengalensis and evaluation of their zoonotic importance in khuzestan province, south-west of iran. for this purpose, 1143 bellamya snails were collected from ahoudasht region in central areas of the province during 2002-2003. bellamya ...

Cercarial dermatitis is a neglected zoonotic disease with distribution all over the world’s temperate zones. It caused by cercariae, larval stage of parasitic blood flukes genus Trichobilharzia that parasite waterfowl. When cercariae burry into human skin, they trigger an allergic reaction leads to severely itching papules. Goal this research was get overview in bathing places Schleswig-Holstei...

A survey of trematode larvae in the fresh water snail, Bithynia goniomphalos in the main water reservoir of Huai Thalaeng district, Nakhon Ratchasima Province, Thailand, was conducted. The study site is in an area with a high prevalence of Opisthorchis viverrini infection. Malacological samplings were made during the year 2000 to study the prevalence and intensity of infection. Parasitological ...