EN
Canine Monocytic Ehrlichiosis is caused by pathogenic rickettsia Ehrlichia canis and is a tick-borne disease transmitted in particular by Rhipicephalus sanguineus and Dermacentor variabilis. The role of other ticks in the CME transmission is still unrecognised. The aim of this screening study on a tick population (n=490) was to determine the possibility of transmitting Ehrlichia canis infection by ticks during dog’s infestation as well as examining the possibility of co-infection with Ehrlichia canis, Borelia burgdorferi and Anaplasma phagocytophila. Examinations were performed with the use of nested polymerase chain reaction (PCR). There was no positive reaction to E. canis on 490 DNA isolates of ticks and no co-infection with Ehrlichia canis, Borelia burgdorferi and Anaplasma phagocytophila was found in the examined tick population. Taking under consideration the negative results in tick populations from the epizootiological point of view, the route of dog infection seems to be problematic despite the fact that there were positive samples in the indirect fluorescent antibody test (IFAT) and in PCR.