Fig. 3From: Schistosoma mansoni among pre-school children in Musozi village, Ukerewe Island, North-Western-Tanzania: prevalence and associated risk factorsPrevalence of S. mansoni based on circulating cathodic antigen, a: not including trace and b: including trace and c: combined Kato Katz and CCA trace positive among 383 pre-school children of Musozi villages, north-western Tanzania, stratified by ageBack to article page