The epidemiology of fascioliasis in Malawi. Part II. Epidemiology in the definitive host.

The epidemiology of Fasciola gigantica Cobbold was studied in the definitive host and the epidemiological cycle was determined. The incidence of immature flukes was high in September to December and mature flukes from December to March. A survey of chronic fascioliasis was conducted covering almost the whole country. The prevalence of the disease was high in the Northern and Central Regions. Based on the epidemiological findings a control programme for the disease in Malawi was prepared.