Rickettsial infection in ticks (Acari: Ixodidae) collected on birds in southern Brazil - Pacheco, Richard de Campos; Arzua, Márcia; Nieri-Bastos, Fernanda Aparecida; Moraes Filho, Jonas; Marcili, Arlei; Richtzenhain, Leonardo José; Barros-Battesti, Darci Moraes; Labruna, Marcelo Bahia (Journal of Medical Entomology, 2012)