Outbreak of cryptosporidiosis among young children attending a day-care centre in Durban.

During an outbreak of an enteric illness occurring among infants and toddlers in a day-care centre in Durban, Cryptosporidium was detected in 51 (73%) of 70 children. Two (10%) of 20 staff members were also found to have cryptosporidiosis. Symptoms occurred in all but 4 of the Cryptosporidium-positive infants and toddlers and lasted for 1-33 days. Oocyst excretion often persisted after cessation of symptoms and continued for up to 50 days in some children. Transmission is considered to have occurred predominantly by person-to-person spread. Measures to prevent transmission of enteric-type diseases were implemented and coincided with cessation of the outbreak.