Difference between revisions of "Ehrlichia phagocytophila"

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(Redirected page to Tick-Borne Fever)
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#REDIRECT[[Tick-Borne Fever]]
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===Tick-borne fever===
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*Caused by ''E. phagocytophila''
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*Affects ruminants in Europe
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*The tick ''Ixodes ricinis'' is the main vector
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*Animals remain carriers for up to 2 years, but are immune to reinfection
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*Clinical signs
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**Incubation period of 2 weeks; recovery in 2 weeks
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**Fever, anorexia, reduced growth rates in young animals
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**Reduced milk production, abortion, still birth
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**Leukopenia and thrombocytopenia
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**Causes immunosuppression in young lambs causing susceptibility to tick pyaemia and louping ill
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*Diagnosis
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**Intracytoplasmic morulae in [[Neutrophils|neutrophils]] of Giemsa-stained blood smears during acute phase
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**Seroconversion detected by immunofluorescence
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*Treatment and control
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**Oxtetracycline
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**Tick control
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**Prophylactic tetracyclines for lambs during first few weeks of life
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[[Category:Rickettsiales]][[Category:Cattle]][[Category:Sheep]][[Category:Goat]]
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[[Category:To_Do_-_Bacteria]]

Revision as of 10:58, 25 June 2010

Tick-borne fever

  • Caused by E. phagocytophila
  • 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