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...

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...

A growing number of enteric protozoan species are considered to have zoonotic potential. Their clinical impact varies and in many cases is poorly defined. Similarly, the epidemiology of infections, particularly the role of non-human hosts, requires further study. In this review, new information on the life cycles and transmission of Giardia, Cryptosporidium, Entamoeba, Blastocystis and Balantid...

A modified micro-respirometer employing the differential volumeter principle, and mechanical accessories for the same, are described. The apparatus enables addition of solutions to be made to the biological material during the experiment. It is of a high sensitivity, a drop movement of 1.0 mm. indicating a volume change of about 0.06 c.mm. It may be used with very small amounts of biological ma...

Chronic diarrhea is one of the most frequent gastro-intestinal manifestations in acquired immunodeficiency syndrome (AIDS). Protozoa and nontuberculous mycobacteria (NTM) are opportunistic pathogens that can easily infect these patients. Among the NTM, Mycobacterium avium complex (MAC) is the most frequently observed pathogen in HIV-infected patients. However, NTMs other than MAC have not been ...

To this day there is still no definitive model for the evolutionary emergence of eukaryotic cells. Before WWII, there existed two non-Darwinian models that have now been forgotten the symbiotic and the orgonomic theories, which are contrasted in the present review. Both had in common the notion that the eukaryotic cell was simply a spontaneous assemblage of prokaryote-like vesicles. The orgonom...

Toxoplasma gondii infection was diagnosed in a full term stillborn reindeer (Rangifer tarandus) fetus. The fetus had encephalitis and placentitis associated with T. gondii. Tissue cysts were identified histologically in sections of brain and tachyzoites were present in placenta and the myocardium. Protozoa in the brain, heart, and placenta stained positively with T. gondii antibodies, but not w...