Parasite isolate usedBabesia felis parasites were obtained from 2 carrier cats, housed at PS-OVI, artificially infected with the stabilate used by Potgieter18. Blood was collected from the vena jugularis of these cats into heparinised syringes; 16 m blood was collected from donor cat 1, and 12 m blood from donor cat 2. The cats exhibited similar parasitaemias.Drugs Five drugs from 4 unrelated pharmacological groups were tested for activity against B. felis. The first 2, enrofloxacin (Baytril, Bayer) and danofloxacin (Advocin,Pfizer),were chosen based on suggestions from clinicians in small animalpractice and for their known effect against malaria parasites. The other 3 drugs, buparvaquone (Butalex, Pitman-Moore), rifampicin (Rifadin, Novartis) and a sulphonamide-trimethoprim combination(Norodine,Centaur) were chosen for their known anti-protozoal activity as described above.Treatment regimensare given in Table 1.Trial procedure The cats were divided into 6 groups. Group I was the control group and consisted of 3 cats.Groups II, III, IV,V and VI consisted of 2 cats each. On Day 0, cats housed at OVARU (2 from Group I; Groups II, III and IV) were inoculated intravenously with 2 ml infected blood from donor cat 1. Cats housed at PS-OVI (1 from Group I; Groups V and VI) were inoculated intravenously with 2 m infected blood from donor cat2. Body temperature, and blood smears made by collecting a drop of blood from the tip of the tail, were examined and recorded daily.
đang được dịch, vui lòng đợi..