| [tick-borne fever (ehrlichia phagocytophila infection) on a dairy farm in friesland]. | disease outbreaks, associated with ixodid ticks, among cows on a dairy farm in friesland, in the north of the netherlands, were monitored during the summers of 1996, 1997, and 1998. the most important symptoms were a sudden drop in milk yield, fever, apathy, and problems with locomotion. the diagnosis 'tick-borne fever' was confirmed by finding ehrlichia phagocytophila inclusion bodies in neutrophils of blood smears from sick animals. significant economic losses due to the disease were recorded ... | 2000 | 10680205 |