Bat rabies in urban centers in Chile. de Mattos CA, Favi M, Yung V, Pavletic C, de Mattos CC. Rabies Section MSG33, Viral and Rickettsial Zoonosis Branch, Division of Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, US Department of Health and Human Services, Atlanta, Georgia 30333, USA. cdd9@cdc.gov One hundred and five rabies isolates obtained from domestic animals and insectivorous bats in Chile between 1977 and 1998 were molecularly characterized by limited sequence analysis of their nucleoprotein genes. These isolates were compared with viruses isolated from known domestic and wildlife rabies reservoirs in the Americas to identify potential reservoirs of rabies in Chile. The phylogenetic analyses showed that none of the Chilean isolates segregated with viruses from the terrestrial reservoirs. No non-rabies lyssaviruses were found in this study. The Chilean samples were not related to viruses of the sylvatic cycle maintained by the common vampire bat (Desmodus rotundus) in Latin America. Five genetic variants were identified from insectivorous bats in Chile. The Brazilian free-tailed bat (Tadarida brasiliensis) was identified as the reservoir for the rabies genetic variant most frequently isolated in the country between 1977 and 1998. The close association of a group of viruses obtained from a domestic dog (Canis familiaris), Brazilian free-tailed bats, and a red bat (Lasiurus borealis) with viruses maintained by Lasiurus spp. in North America implicated species of this genus as the possible reservoirs of this particular genetic variant in Chile. Reservoirs for the other three variants remain unknown. Ciento cinco aislados rábicos obtenidos de animales domésticos y murciélagos insectívoros en Chile entre 1977 y 1998 fueron molecularmente caracterizados por análisis de secuencia del gen de la nucleoproteína. Estos aislados fueron comparados con virus aislados de reservorios conocidos de animales domésticos y silvestres en las Américas para identificar potenciales reservorios de rabia en Chile El análisis genético demostró que ninguno de los aislados chilenos segregaban con virus de reservorios terrestres En este estudio no se encontró Lyssavirus no relacionados. Las muestras chilenas no fueron relacionados con ciclos selváticos mantenidos por murciélago vampiro (Desmodus rotundus) en America Latina. Cinco variantes genéticas fueron identificadas con murciélagos insectívoros en Chile. El murciélago Tadarida brasiliensis fue identificado como el reservorio para la variante genética principalmente aislada en el país entre 1997 y 1998. La cercana asociación de un grupo de virus obtenidos de un perro domestico (Canis familiaris), murcielagos Brazilian cola libre y un murciélago rojo (Lasiurus borealis) con virus mantenidos por especies de Lasiurus spp. en Norte America como posibles reservorios de esta particular variante en Chile. Reservorios de las otras tres variantes permanecen desconocidas.