Difference between revisions of "Cowdriosis"
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[[Category:Rickettsiales]][[Category:Cattle Bacteria]][[Category:Sheep Bacteria]][[Category:Goat Bacteria]] | [[Category:Rickettsiales]][[Category:Cattle Bacteria]][[Category:Sheep Bacteria]][[Category:Goat Bacteria]] | ||
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Revision as of 22:32, 5 June 2011
Heartwater
- Severe disease of ruminants in sub-Saharan Africa caused by Cowdria ruminantium
- Vectors include Amblyomma ticks
- Carrier status can occur for up to 8 months in adult cattle and wildebeest
- Clinical disease in calves and lambs
- Clinical signs
- Incubation period 4 weeks
- Acute fever
- Neurological signs including chewing, twitching of eyelids, circling, high-stepping gait, convulsions and recumbency; can be fatal
- Subacute cases suffer from hydropericardium, hydrothorax and pulmonary oedema and congestion; splenomegaly and haemorrhages may occur
- Diagnosis
- Clinical and post mortem findings in endemic areas suggestive
- Orgnisms present in nuclei of endothelial cells in Giemsa-stained brain tissue
- PCR, indirect immunofluorescence, ELISA and western blot
- Treatment and control
- Tetracyclines during early disease
- Immunisation using infected blood