Triatomine infestation and vector-borne transmission of Chagas disease in northwest and central Parana, Brazil.
Triatomine infestation, prevalence of T. cruzi antibodies in humans and domestic animals, and variables potentially associated with the presence of triatomines in a rural domiciliary unit (DU) were investigated in nine municipalities and one district of Parana, Brazil, from June 1996 to February 2000. DUs were defined as all houses and annexes on a given piece of property. Blood samples from human volunteers, dogs, and cats were submitted to indirect immunofluorescence. An epidemiological form was completed for each DU. A logistic model was adopted in order to identify associations. Seven out of nine municipalities were positive for triatomines. T. infestans was not captured, but T. sordida, P. megistus, and R. neglectus were. Different variables were considered decisive for the presence of triatomines across the municipalities: proximity to residual wooded areas, i.e. either scrub forest (capoeira) or islands of residual forest (slightly dense vegetation), longer time of residence, existence of inhabited houses, and past DU infestation. In order to ensure proper continuation of the recommended Chagas disease control program, entomo-epidemiological surveillance measures need to be maintained.
Departamento de Análises Clínicas, Universidade Estadual de Maringá, Maringá, Brazil. alfguilherme@uem.br
Ana Lucia
AL
Falavigna-Guilherme
Rosângela
R
Santana
Gilberto Cezar
GC
Pavanelli
Elias Seixas
ES
Lorosa
Silvana Marques de
SM
Araújo
D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood*; D001938:Brazil / Q000453:epidemiology; D002415:Cats; D014355:Chagas Disease / Q000175:diagnosis / Q000453:epidemiology* / Q000635:transmission; D004285:Dogs; D019084:Fluorescent Antibody Technique, Indirect; D006798:Housing; D006801:Humans; D007303:Insect Vectors; D011156:Population Density; D012424:Rural Population; D014225:Triatominae
D000913:Antibodies, Protozoan