The prevalence of intestinal parasitic infections was studied for a period of 5 years (April 1996-April 2001) among urban slum dwellers. All age groups were represented in the study. Parasitological examinations were performed on 939 faecal specimens collected on a household basis. The total prevalence of pathogenic parasites was 33.6 per cent. No significant age and sex differences in pathogenic parasites were observed. The prevalence of intestinal helminths and pathogenic protozoa was as follows: Hymenolepis nana (9.9 per cent), Ascaris lumbricoides (8.5 per cent), Giardia lamblia (8.4 per cent) and Entamoeba histolyticaldispar (3.7 per cent). Thirty-four E. histolytica/dispar positive samples were cultured and speciation was done using polymerase chain reaction (PCR). The predominant isolate was E. dispar compared to E. histolytica. The notable finding of the present study was high prevalence of Hymenolepis nana compared with other parasitic infections in slum dwellers.
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