§ Mr. Gareth WardellTo ask the Secretary of State for Health what information his Department holds on the incidence of morbidity in children resulting from the ingestion of cryptosporidium oocysts.
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§ Mr. DorrellThis information is not collected centrally. A study carried out by the Public Health Laboratory Service in 1985–87 covering over 60,000 patients, identified cryptosporidium infection in 2 per cent. of cases. Cryptosporidium infection was found in 4.9 per cent. of one to four-year-olds.