Intestinal parasitism among students in three localities in South Wello, Ethiopia

Abstract

Abstract: A cross-sectional study to estimate the prevalence of intestinal parasites has been conducted in 1996 in South Wello in the towns of Kembolcha, Bati, and Mekaneselam. A total of 698 students were selected randomly by using the master list of the school as a sampling frame. The students were interviewed using a questionnaire on the use of toilets, sources of water for drinking, and purpose of washing. From the study subjects stool samples were collected and, screened for intestinal parasites using the Ritchie formol-ether technique. Of the examined, 304 (43.6%) were positive for various intestinal parasites. Schistosoma mansoni (24.9%) was commonest followed by Ascaris lumbricoides (18.3%) and Trichuris trichiura (4.4%). Other less frequent parasites were Hookworm Spp. (2%), Hymenolepis nana (1.3%), Giardia lamblia (1.1%), Strongyloides stercoralis (0.9%), Enterobius vermicularis (0.3%), and Trichostrongylus Sp. (0.1%). Prevalence of S.mansoni was significantly higher in males than in females (P<0.01); in the 10-14 year old than in the 15-19 and 20+ age groups (P<0.05), and among the Bati students than in those in Kembolcha and Mekaneselam (P<0.001). Markedly higher rates of Ascaris and Trichuris were observed in Kembolcha(P<0.01) than in Bati and Mekaneselam but showing no difference between males and females, and between the two age groups. The public health implications of intestinal parasites among school children and possible control measures are discussed. [Ethiop. J. Health Dev. 1998;12(3):231-235]