بررسي فراواني آلودگيهاي انگلي روده اي در بين ساندويچ فروشان و پيتزافروشان شهر يزد

Intestinal parasitic infections are one of the most important sanitation problems in developing countries. The majority of these infections are usually chronic and asymptomatic. The major route of infection is by direct contact with the source of infection. One of the main sources are workers in pizza and sandwich selling houses. In this study, 3 successive specimens were obtained from all of the 197 workers of 76 sandwich and pizza centers in Yazd during one week and the specimens were examined by three different methods; wet mount, floatation and formalin - ethyl method. Our data showed 39% of the population under study were healthy, while 61% were infected with at least one pathogenic and/ or non pathogenic parasite, the statistics of which were as follows: 26.3%. Entamoeba coli, 20.8% Endolimax nana, 12.2% Giardia lambdia, 8.6% Iodamoeba butschlii, 4% schilomastix mesnili, 3.6%. Hymenlepis nana 2.5%. Trichocephalus, 1% Ascariasis, 1% Enterobius and 6% with other species.In regards to relation of "years of work" and "rate of infectivity", 39.1% were working since 1 year of which 63.3% were infected, 35.5% were working since 2 years of which 60% were positive, 18.7% had a three year record of which 56.7% were infected and 6.6% had a record of 4 years or more of which 62% were infected. In conclusion, our data indicated that there is significant relation ship between the parasitic infections and years of work (P < 0.01).