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  • Title: Clinical efficacy of ampicillin, pivampicillin and procaine penicillin G in a soft tissue infection model in ponies.
    Author: Ensink JM, Klein WR, Barneveld A, Vulto AG, Van Miert AS.
    Journal: J Vet Pharmacol Ther; 1996 Dec; 19(6):445-53. PubMed ID: 8971673.
    Abstract:
    Tissue chambers, implanted subcutaneously in ponies, were inoculated with Streptococcus zooepidemicus. The animals received either no antibiotics or one of the following treatments: pivampicillin per os (19.9 mg/kg, equivalent to 15 mg/kg ampicillin, every 12 h) for 7 or 21 days (7 and 5 ponies, respectively), procaine penicillin G intramuscularly (12 mg/kg = 12,000 IU/kg, every 24 h) for 7 days (7 ponies), or ampicillin sodium intravenously (equivalent to 15 mg/ kg ampicillin, every 8 h) for 1 day (5 ponies). Only intravenous administration was started before infection (prophylactically), the other treatments were started 20 h after infection (curatively). A total of 7 ponies received no antibiotics. In untreated controls, the infection led to abscessation of the tissue chamber in 4 to 10 days. Curative treatment with either pivampicillin or procaine penicillin G for 7 days resulted in a reduction of viable bacteria in the tissue chamber but did not eliminate the infection, resulting in abscessation in 5 to 14 days. However, administration of pivampicillin for 21 days eliminated the streptococci in five out of five ponies and prophylactic administration of ampicillin was successful in three out of five ponies.
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