RESUMEN

In 1998, an epizootic of yellow fever (YF) killed many howler monkeys (Alouatta spp.) in eastern Amazonia near the city of Altamira. An infection level with YF virus of approximately 3.6% was determined from analysis of 456 females of Haemagogus janthinomys Dyar, the main enzootic YF vector in South America. One month later, a second study of 164 females captured in the same place led to infection levels of 0.8% for parous and 2.9% for nulliparous females. These results lead to the conclusion that vertical transmission, one of the key elements in the epidemiology of YF, occurs in South America as it does in Africa.

Asunto(s)

Alouatta , Culicidae/virología , Insectos Vectores/virología , Enfermedades de los Monos/transmisión , Fiebre Amarilla/veterinaria , Virus de la Fiebre Amarilla/aislamiento & purificación , Animales , Brasil , Reservorios de Enfermedades/veterinaria , Femenino , Humanos , Transmisión Vertical de Enfermedad Infecciosa , Masculino , Ratones , Paridad , Fiebre Amarilla/transmisión