[Lymphatic filariasis in Belém, Pará State, North of Brazil and the perspective of elimination].

The objective was to characterize the epidemiological situation of lymphatic filariasis in Belém, state of Pará. Hemoscopic data was analyzed from 1951 through 2003. Information for the period from 1951 to 1994 was collected from reports available from the National Health Foundation. Data from 1995 to 2003 was obtained through surveys carried out in 62 city sectors, within the eight administrative districts of the city. An appreciable drop in the microfilaraemic rates was observed over the years. The percentages of parasitized individuals in the decades of 1950, 1960, 1970, 1980 and 1990, were respectively: 8.2%, 2.6%, 0.7%, 0.16% and 0.02%. In 2001, a single microfilaraemic case was diagnosed, interrupting a series of two years without registering positive cases in the city. In 2002 and 2003, hemoscopic and entomological surveys were performed simultaneously revealing no microfilariae positive individuals, nor infected mosquitoes. To maintain this trend, surveillance measures must be conducted in order to detect and promptly treat patients, to prevent the risk of resurgence of a focus apparently now controlled.