Morphological information is given on the adults of 4 trematodes from Mugil cephalus from estuarine waters of the northern Gulf of Mexico with complementary information from specimens from Georgia. Lasiotocus glebulentus sp. n., from the Gulf, possesses a submedian genital pore and apparently differs from all known species by containing several large concretions in the excretory vesicle. Data a...

From 1976 to 2000, over 30,000 human stool samples from 38 communes in 15 provinces were examined. The average infection rate of Clonorchis and Opisthorchis in the provinces examined was 21%. In these provinces, the infection rates were distributed as follows: 0.6% in Ha Giang, 0.2% in Thai Binh, 16.3% in Bac Giang, 13.1% in Hai Phong, 5% in Hoa Binh, 16% in Ha Tay, 3-37.5% in Nam Dinh, 3% in H...

A total of 128 spiny eels Mastacembelus mastacembelus (Mastacembelidae) were collected from theGreater Zab river at Iski Kalak town, west of Erbil city, Kurdistan region, Iraq, from July 2007 to the end ofJune 2008. The fish were examined for ecto and endo parasites. The study revealed the existence of 16species of parasites (with a total prevalence of 89.06%) including: two species of protozoa...

For ectotherms, temperature is an important correlate of variation in body size within species. Variation in body size among related species could also be attributable in part to temperature if the different species grow under different thermal regimes. The roles of both initial (larval) size and host body temperature on final (adult) size of parasitic trematodes were investigated in a comparat...

Biological control of schistosomiasis by means of introduction of the north American planorbid snail, Helisoma duryi, as a competitor of the intermediate host snails has been proposed. The systematics of the genus Helisoma and the geographic distribution of the different species is described. Papers dealing with laboratory experiments or field observations on the competition between H. duryi an...