ABSTRACT
Adults of Rhodnius prolixus, R. pictipes and Panstrongylus geniculatus found in houses in Manaus have high rates of Trypanosoma cruzi infection. Rhodnius spp. were found throughout the year, but males of P. geniculatus were significantly more frequent in the dry season.
Subject(s)
Insect Vectors/parasitology , Panstrongylus/parasitology , Rhodnius/parasitology , Animals , Behavior, Animal , Brazil , Female , Insect Vectors/classification , Insect Vectors/physiology , Male , Panstrongylus/classification , Panstrongylus/physiology , Rhodnius/classification , Rhodnius/physiology , Seasons , Sex Factors , Urban HealthABSTRACT
Adultos de Rhodnius prolixus, R. pictipes e Panstrongylus geniculatus encontrados em casas em Manaus apresentam altas taxas de infecção por Trypanosoma cruzi. Rhodnius spp não apresentavam sazonalidade acentuada, porém os encontros de machos de P. geniculatus eram muito mais freqüentes na estação seca.
Adults of Rhodnius prolixus, R. pictipes and Panstrongylus geniculatus found in houses in Manaus have high rates of Trypanosoma cruzi infection. Rhodnius spp. were found throughout the year, but males of P. geniculatus were significantly more frequent in the dry season.
Subject(s)
Animals , Female , Male , Insect Vectors/parasitology , Panstrongylus/parasitology , Rhodnius/parasitology , Behavior, Animal , Brazil , Insect Vectors/classification , Insect Vectors/physiology , Panstrongylus/classification , Panstrongylus/physiology , Rhodnius/classification , Rhodnius/physiology , Seasons , Sex Factors , Urban HealthABSTRACT
Twenty-eight isolates of Histoplasma capsulatum were obtained from eight species of forest mammals from the States of Amazonas, Pará and Rondônia in the Amazon Region of Brazil. Primary isolates were obtained by inoculating triturated liver and spleen tissue intradermally and intraperitoneally in hamsters. Mycological diagnosis in hamsters presenting lesions was confirmed by histopathology and culture on Sabouraud dextrose-agar. Infected hamsters developed signs of disease within two to nine months; all had disseminated visceral lesions and most also had skin lesions at the sites of inoculation. None of the hamsters inoculated with skin macerates of the original hosts developed histoplasmosis, and histopathological examination of the viscera of the wild hosts failed to reveal H. capsulatum. Prevalence of infection was considerably higher in females than in males both for the opossum Didelphis marsupialis and for total wild animals (479) examined. It is proposed that canopy-dwelling mammals may acquire the infection from conidia borne on convective currents in hollow trees with openings at ground-level.
