Filariasis in Ceylon then (1961) and in Sri Lanka now (1990-30 years on).

The changes in the prevalence and distribution of bancroftian filariasis in Ceylon/Sri Lanka since Professor Kershaw's visit in 1961 show that the infection has spread over a wider area, although the microfilaria rates have decreased. New information is available on the vector, Culex quinquefasciatus, and more details are available on the animal filariae and their vectors. Dirofilaria repens infection of dogs is now a proven zoonosis in the country.