Distribution of intestinal parasites among school-age children in Delta and Edo state of Nigeria

ABSTRACT

School-age children are one of the highly susceptible groups to intestinal parasitic infections. There is a wide disparity in the prevalence and distribution of intestinal parasites globally. Once high-risk areas are identified, WHO recommends at least a yearly de-worming program of school children. The aim of this investigation was to assess the prevalence of intestinal parasites among school-age children in Delta and Edo States, Nigeria. Fecal samples of 386 school-age children between 6 and12 years old were examined for intestinal parasites in six schools of Delta and Edo States. Samples were examined for gastrointestinal parasites using formol-ether concentration and Kato-Katz techniques. Data were subjected to odd ratio analysis. Seven intestinal parasites were detected in the stool samples of these children Ascaris lumbricoides, Hookworm, Trichuris trichiura, Strongyloides stercoralis, Enterobius vermicularis, Schistosoma mansoni and Giardia lamblia. The difference in prevalence was significantly lower in Edo State [35.98%] than in Delta State [51.54%]. A. lumbricoides followed by hookworm infections were observed to be the most prevalent in both States; Delta [42.78%, 28.35%, respectively] and Edo [25%, 13.02%, respectively]. Parasites of lowest prevalence were S. stercoralis [0.51%], G. lamblia [0.51%] and S. mansoni [0.51%] in Delta State, while T. trichiura and S. mansoni parasites were not recovered from the feces of Edo State school-age children. The prevalence of co-infection among infected children in Edo State was 43.47% while that in Delta State was 27%. The preponderance of co-infection by Ascaris and hookworm was recorded in Delta State [26%], with multiple parasitisms in Edo State [4.76%] and Delta State [11.32%]. Heavy infection with Ascaris was observed more in Delta [51.8%] than in Edo [12.5%]. Additionally, T. trichiura [11.34%] was seen only in Delta State children while the most prevalent protozoan parasite was Giardia in Edo State [3.1%]. Intestinal parasites are hyper-endemic among Delta and Edo States school children and thus, there is need for the institution of integrated intervention programs for sustainable elimination of these parasitic diseases