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The aim of this study was to evaluate the parasitological contamination in samples of lettuce (Lactuca sativa) commercialized in Lavras city, Minas Gerais. The samples of lettuce showed low hygienic conditions, indicated by the presence of parasites of animal or human origin and high concentration of fecal coliforms.
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A parasitologic survey of a low socioeconomic level community from Mara County, Zulia State, Venezuela was done. A single stool specimen per person from 327 individuals was obtained and examined by hematoxylin stained fecal smears and formol-ether concentrates. The overall parasitic infection rate was 92%. Multiple infections were present in 89% of the population. The amebic prevalence rate (APR) was 41.5%. Entamoeba histolytica was found in 9.2% of the individuals, most of them being asymptomatic. Haematophagous trophozoites were observed in two symptomatic cases. Entamoeba coli was the most frequent protozoan (23.5%). The APR was high in all groups. In males it was higher in 7-12 year old children and adolescents, and in females it was higher in adults. Giardia lamblia was the most frequent flagellate (18%) and among the helminths, Trichuris trichiura (82.8%) and Ascaris lumbricoides (74.6%). The high rates of parasitic infection, multiple parasitosis and amebic prevalence reflect the low socioeconomic conditions in the population.