1990 Cryptosporidiosis outbreak associated with educational visit to dairy farm. England
1990 Eleven children aged 7 to 8 years from one school class developed diarrhoea and vomiting after an educational visit to a dairy farm. SHIELD, J. et al. Cryptosporidiosis--an educational experience. J Infect, v. 21, n. 3, p. 297-301, Nov 1990. ISSN 0163-4453. Disponível em: < http://www.ncbi.nlm.nih.gov/pubmed/2273276 >.