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 was between 6 and 15 years (mean age 9.3 ys). The rate of parasitic infection among girls and boys were 6% and 64%, respectively (P<0.005). The prevalences of pathogenic protozoa including Giardia and Entamoeba histolytica were 26% (22% in urban areas 28.4 % in rural areas) and 6.7% (5.6% in urban areas, 28.4% in rural areas), respectively.The prevalences of non pathogenic protozoa were as follows; E.Coli 27.8%, iodamoebabutschlii12.1% endolimaz nana 7.8% chilomastix mesnili 6.5 %, Dientamoeba frogilis 4.9% and trichomonas hominis 2%. The prevalence of helminis was as follows. Enterobius vermicularis 3% (1.8% in urban areas, 3.5% in rural areas). Ascaris 2.5% (2% in urban and 2.5% in rural regions), trichocephalous 1% (1.2% in urban regions and 8%in rural regions). Dicrocoeloum 3%, taenicand hoole worms 2%, Trichostrongylus and Fasciola 1%.In this survey high prevalencs of Giardia (pathogenicprotozoa) and E.Coli (a non pathogenic protozoa) are remarkable

To investigate the helminths and coccidial infections of dairy cattle around Urmia, the faecal samples from 200 cattle and 100 calves were collected and examined. The results indicated that the cadle was infected to Nematode spp (41.5%), Trichuris spp (1%), Dicrocelium dendriticum (1%), Moniezia benedeni eggs(3.5%) and Eimeria spp oocyst (36%) and calves were infected to Nematode spp (23%)and Eimeria spp oocyst(27%).

Objective: Determination of frequency of helminthes infection rate of liver and economical lost.Design: Random sampling.Animals: Carcasses of 2386 buffalo.Procedures: In this survey, 2386 carcasses of buffalo examined in Urmia industrial slaughterhouse and 220 (9.2 %) infected livers platyhelminthes transferred to parasitology lab in College of Veterinary Medicine from Dccember 2000 to June 200 I. Worms were separated and counted. To determine ecnomicallost, number of confiscated livers and their cost per day were recorded.Results: From 67375 worms removed and counted, four species of helminthes have been identified in confiscated liver of sheep, of which three were trematodes with one metacestode. The highest rates relating to Dicrocoelium denderiticum 98.35% followed by Fasciola hepatica 0.65% Fgigantica 0.1]4 and infected liver by hydrated cyst was 0.89% Infection rate of trematode, cestode and mixed infection were 25%, 60% and 15%, respectively. During this survey, the economical lost for 494 kg/day were 10404000.

This survey was carried out on a total of 18795 sheep in Urmia slaughterhouse from November 2000 until June 2001. Results revealed that 1791 (9.53%) livers of slaughtered sheep were infected by helminthes infection (Trematod and metacestode). Of 1791 infected livers, frequency rate of Dicrocoelium denderiticum, Fasciola hepatica, F. gigantica, and hydatid cyst was 72.81%, 12.12%, 1.45%, and 13.62%, respectively. Trematod, cestode and mixed infection were, respectively, 86.38%, 13.62% and 30.49%, as well. During this survey, the economical loss for average 1791 of the infected livers was 35820000 Rials.

Background and Aim: Parasites infect man by way of water, soil, edible things and direct contact. Numerous factors such as the economical, social and cultural conditions as well as lack of personal health care are involved in the dissemination of the parasites. Eating of raw vegetables is common among Iranians and provides a rich source of vitamins and essential nutrients but may lead to human contamination if not washed properly. Materials and Methods: In this study 30 plant farms were selected in Isfahan in order to assess the rate of contamination of the plants. Afterwards 480 samples of the vegetables were collected and examined for cysts, eggs and larvae in Isfahan Research Center. Floatation method was used for detection of the parasite eggs. Finally the results were recorded and analyzed by means of SPSS (Version 11.5).Results: We found giardia cyst in 7, dicrosoelium egg in 8, hymenolepis egg in 14, ascaris egg in 16, trichostrongylus egg in 10, teania egg in 5 and trichosephalus egg in 6 cases. In fact, egg of ascaris was the most and teania was the least common parasites and fortunately we did not detect any dangerous agent like Entamoeba histolytica. Conclusion: In the recent years, in spite of improvement of health care, economical, social and agricultural conditions in Isfahan, parasitic infections are still prevalent. Using new methods for garbage collection, repair of ego system, preventing domestic and wild animals (like carnivorous animals) from entering into the plant farms and education of people of different social classes will be effective in reducing parasitic and infectious diseases.