Cowdria ruminantium infection in ticks in the Kruger National Park
UNSPECIFIED. (1999) Cowdria ruminantium infection in ticks in the Kruger National Park. VETERINARY RECORD, 145 (11). pp. 304-307. ISSN 0042-4900Full text not available from this repository.
Adult Amblyomma hebraeum ticks, the principle vector of heartwater (cowdriosis) of domestic ruminants in southern Africa, were collected in pheromone traps placed in Kruger National Park, an exclusively wildlife sanctuary in South Africa. These ticks transmitted Cowdria ruminantium, the rickettsial agent causing heartwater, to a susceptible goat, resulting in acute, fatal disease. C ruminantium was isolated in bovine endothelial cell culture from the plasma of this animal during the febrile stage of the disease and transmitted to susceptible goats, causing fatal heartwater. The prevalence of C ruminantium infection in 292 ticks was determined by polymerase chain reaction (PCR) analysis to be 1.7 per cent (95 per cent confidence interval 0.71 to 4.0 per cent). A DNA probe analysis, which is less sensitive than PCR, detected infection in three of the five PCR-positive ticks. The remaining infections were below the detection limit of the DNA probe, which is approximately 70,000 organisms. This is the first evidence that a vector-wildlife cycle of transmission of C ruminantium can be maintained independently of domestic ruminants.
|Item Type:||Journal Article|
|Subjects:||S Agriculture > SF Animal culture|
|Journal or Publication Title:||VETERINARY RECORD|
|Publisher:||BRITISH VETERINARY ASSOC|
|Date:||11 September 1999|
|Number of Pages:||6|
|Page Range:||pp. 304-307|
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