To determine the prevalence of intestinal parasites in school children of Shariar, 1902 students (58 % male, 42 % female) were randomly selected from 22 schools in rural and urban regions of Shahriar. After filling out a questionnaire from the selected students, fresh stool samples were examined for the presence of intestinal parasites and determining this tynos. The age of study population wa...

There are few vac cines for pro to zoan in fec tions in any spe cies. Those that have been de vel oped are summa rised in Ta ble 1. They share the com mon fea ture that all uti lise liv ing par a sites which have been ei ther at ten u ated in vivo or in vi tro or, in the case of Theileria parva, are non-attenuated but in which their patho ge nic ity is mod u lated by con cur rent drug treat men...

Vibrio parahaemolyticus is a food-borne pathogen that naturally inhabits both marine and estuarine environments. Free-living protozoa exist in similar aquatic environments and function to control bacterial numbers by grazing on free-living bacteria. Protozoa also play an important role in the survival and spread of some pathogenic species of bacteria. We investigated the interaction between the...

We report improved separation of chromosome-sized DNA molecules of the coccidian parasite Cryptosporidium parvum with contour-clamped homogeneous electric fields (CHEF). We used scanning densitometry to determine that the most likely number of chromosomes is eight. Molecular probes consisting of cloned genes were used to distinguish each of five bands visible on CHEF gels. We have also identifi...

Coccidioidomycosis was first described in Argentina in 1892 by Alexandro Posadas (4). Robert Wernecke confirmed the syndrome in the same year and, together with Posadas, discerned that the etiologic agent was infectious. Rixford and Gilchrist formally described the organism in California, and thinking the organism to be a coccidian protozoan, they named it Coccidioides immitis Rixford and Gilch...

Factors Influencing Size of the Protozoal Population .................................................................. 28 Diurnal Variations in the Holotrich Population ............................................ ......................28 IN VITRO CULTIVATION OF HOLOTRICH PROTOZOA...........................................................28 TECHNIQUES FOR ISOLATION OF HOLOTRICH CILIATES FROM R...