Chemoprophylaxis of Anaplasma ovis infection in sheep with a long-acting oxytetracycline.
The chemoprophylactic efficacy of long-acting oxytetracycline was determined in 13 susceptible ewes infected with Anaplasma ovis. The drug was administered intramuscularly at a dose rate of 20 mg kg-1 body weight during the prepatent period. When the ewes were exposed to an equivalent homologous challenge on Day 45 post-infection, each showed a mild or inapparent reaction. The host reactions, i.e., body temperature, parasitaemia, packed-cell volume (PCV), haemoglobin, humoral and cell mediated immunity (CMI) were also studied. The results indicate that the use of oxytetracycline during the incubation period would minimise clinical signs of an Anaplasma infection; this may be due to an increasing CMI response.[1]References
- Chemoprophylaxis of Anaplasma ovis infection in sheep with a long-acting oxytetracycline. Sharma, S.P., Bansal, G.C. Vet. Parasitol. (1985) [Pubmed]
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