Distribution of 'Ehrlichia walkeri' in Ixodes ricinus (Acari: Ixodidae) from the northern part of Italy.

The prevalence of 'Ehrlichia walkeri' in Ixodes ricinus in northern Italy was studied. A total of 456 ticks were collected from seven places around Belluno, and 292 living ticks were examined using polymerase chain reaction (PCR). Nineteen ticks were positive for gltA of 'E.