[Canine ehrlichiosis in Tunisia. Seroepidemiological survey].

The seroprevalence of ehrlichiosis was investigated in 1,216 dogs from eight administrative areas in five regions with different climates. In and around Tunis, where the animals receive satisfactory care, the average prevalence is 49%, but it ranges from 75 to 85% in the other regions of the interior. The authors underline the importance of this disease and describe the conditions which favour its transmission. They also note that the high percentage of asymptomatic carriers provides further proof that Ehrlichia canis is an opportunist pathogen in endemic areas.