The study was aimed at determining the prevalence of cryptosporidium oocysts in faecal samples among primary school children in Wamakko local government of Sokoto State, Nigeria. A total of forty (40) samples were obtained from pupils attending different primary schools within Wamakko Local Government. The primary schools include; Kwalkwalawa Primary School, Kaurar Kimba Primary School, Fanari Primary School and Asari Primary School. A total of ten faecal samples were collected from each

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... school. Faecal samples were analysed using formal diethylacetate to detect the presence of cryptosporidium oocysts. The highest percentage prevalence of occurrence (80%) of cryptosporidiosis infection was recorded among the pupils of Kaurar Kimba primary School followed by Kwalkwalawa and Fanari Primary Schools with 60% prevalence each, while the least prevalence was recorded in Asari Primary School with 50% prevalence. There was no significant variation between the 4 schools (P>0.05). Cryptosporidiosis was high in female children (65%) compared to males (60%), however there was no significant variation between the two sexes (P>0.05). Children within the age group 6-8 years old had the highest prevalence (70%) followed by age group 9-10 years 60%. The least percentage prevalence was recorded among the age group 11-12 years old (50%) (5/10). There was no significant difference between the different age groups (P > 0.05). It is interesting to note the high rate of asymptomatic cryptosporidium infection in the study area.