Anaplasma marginale is a gram-negative obligate intracellular tick-borne bacterium that infects erythrocytes of ruminants and other mammalian host species from tropical and subtropical world regions. In Argentina, the transmission of A. marginale is mainly associated to the one-host tick, Rhipicephalus microplus. Although the presence of A. marginale DNA was previously confirmed in R. microplus larvae by PCR, the transovarial transmission of the bacterium in the tick remains neglected. The aim of the present study was to detect and molecularly characterize A. marginale in the bovine and in organs from R. microplus engorged female removed from the host, in order to determine the A. marginale genotypes involved in the transmission process. For this purpose, blood and tick samples were obtained from a bovine with acute Anaplasmosis at an endemic region in Corrientes province, Argentina.Para acceder a la videoconferencia completa, hacer clic en "Enlace externo".Sociedad Latinoamericana de Ecología de Vectores