Cryptosporidium parvum, Giardia lamblia and Entamoeba histolytica are three of the principal protozoo groups which cause gastro-intestinal infections.
• Cryptosporidiosis is a protozoal infection caused by Cryptosporidium parvum in human. Typically, is an acute short-term infection but can become severe and non-resolving in children and immunocompromised individuals such as aids patients. It is may also be asymptomatic. In tropical developing countries, the parasite is often endemic and causes diarrhoea epidemics among children. With immunocompetent patients, the disease manifests itself as self-healing gastroenteritis.