Difference between revisions of "Ehrlichia phagocytophila"
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===Tick-borne fever=== | ===Tick-borne fever=== | ||
| − | *Caused by ''E. phagocytophila'' which has now been | + | *Caused by ''E. phagocytophila'' which has now been renamed as ''Anaplasma phagocytophilum'' |
*Affects ruminants in Europe | *Affects ruminants in Europe | ||
*The tick ''Ixodes ricinis'' is the main vector | *The tick ''Ixodes ricinis'' is the main vector | ||
Revision as of 17:18, 7 October 2010
Tick-borne fever
- Caused by E. phagocytophila which has now been renamed as Anaplasma phagocytophilum
- Affects ruminants in Europe
- The tick Ixodes ricinis is the main vector
- Animals remain carriers for up to 2 years, but are immune to reinfection
- Clinical signs
- Incubation period of 2 weeks; recovery in 2 weeks
- Fever, anorexia, reduced growth rates in young animals
- Reduced milk production, abortion, still birth
- Leukopenia and thrombocytopenia
- Causes immunosuppression in young lambs causing susceptibility to tick pyaemia and louping ill
- Diagnosis
- Intracytoplasmic morulae in neutrophils of Giemsa-stained blood smears during acute phase
- Seroconversion detected by immunofluorescence
- Treatment and control
- Oxtetracycline
- Tick control
- Prophylactic tetracyclines for lambs during first few weeks of life