[Indirect immunofluorescence in filariasis. II. Humoral response in a population living close to a patient with confirmed Wuchereria bancrofti (Nematoda: Filarioidea), Cuba, 1983].

This paper deals with the study by Knott technique, membrane filter and indirect immunofluorescence, of 256 individuals living in Pinar del Rio City, neighbors of a patient suffering elephantiasis produced by Wuchereria bancrofti, 111 donors of the blood bank in the same city, and 10 patients coming from endemic areas who were hospitalized at the "Pedro Kouri" Tropical Medicine Institute, with certainty diagnosis of bancroftiasis. Circulating microfilariae were not found in the neighbors of the positive case, however, a high antifilaria antibody titer (1:512) was observed in the neighbors, suggesting it that in any time this population could have been in contact with this parasite.