Falha na transmissäo de Borrelia anserina pelo Amblyomma cajennense (Acari: Ixodidae) / Failure in transmission of Borrelia anserina by Amblyomma cajennense Acari: Ixodidae

ABSTRACT

This work describes an attempt to transmit Borrelia anserina by Amblyomma cajannense. Chickens showing clinical spirochetosis were obtained following infestation by an infected Argas miniatus. Infected and uninfected SPF chickens were subsequently infested by Amblyomma cajannense larvae originated from a single engorged female. After natural drop-off from the hosts, engorged larvae were caught and kept for molting into nymphs. From engorged larvae fed on spirochetemic chickens, slide smears were made in which spirochetes could be observed. Another group of SPF chickens were infested by nimphs and no clinical disease was observed for a 20-day period. It was concluded that A. cajennense did not transmit B. anserina to chickens under experimental conditions