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...

background: leucocytozoonosis is a disease of birds caused by obligate intracellular protozoa of the genus leucocytozoon. we determined the prevalence of leucocytozoon spp. using light and transmis-sion electron microscopy in domestic birds in southwest of iran. methods: a total of 825 blood smears from 275 birds were examined for presence of infection. the structure morphology of leucocytozoon...

Parasites with complex life cycles often stimulate both antibodyand cell-mediated defence mechanisms, whose effectiveness depends on the particular parasite and the stage of infection. Malaria, which is caused by different species of plasmodia, ranks amongst the most common and important parasitic diseases. Infection of humans is initiatedby thebite of an infectedmosquito, resulting in the inje...

A study of thin sections of Paramecium multimicronucleatum, Tetrahymena pyriformis, Tokophrya infusionum, and Amoeba proteus shows that the mitochondria in all these protozoa are similar in certain aspects of their fine structure to that described in metazoan cells. As in higher organisms the mitochondrion is surrounded by a double limiting membrane and contains protrusions directed inward from...

background and objectives: essential oils may improve the utilization of nutrients by ruminal microorganisms. the aim of this study was to assess the effect of different doses of ajowan essential oils (aeo) on growth and fibrolytic activity of anaerobic fungi, and generic distribution of ciliated protozoa ( in vitro ). material and methods: different doses of aeo (0, 150, 300, 450 and 600 ppm) ...

Formation of random network of DNA strands is simulated on a two-dimensional triangular lattice. We investigate the size distribution of pores in the network. The results are interpreted within theory of perco-lation on Bethe lattice.