PMID: 7337397Jan 1, 1980Paper

Sensitivity of staphylococci from farm animals to antibacterial agents used for growth promotion and therapy. A ten year study

Annales de recherches vétérinaires. Annals of veterinary research
L A Devriese

Abstract

The following results were obtained during the period of 1970 to 1979-1980 in a study of 1040 Staphylococcus aureus strains in Belgium from cattle, poultry and pigs and 138 Staphylococcus hyicus strains from pigs, using the agar dilution technique and different penicillinase test methods: -- The incidence of penicillinase-positive strains increased in bovine and porcine S. aureus strains but decreased in poultry strains. From 1974 on more than 75% of S. aureus strains from cow udders produced penicillinase. -- The numbers of tetracycline-resistant strains steadily decreased during the period under investigation. -- Strains resistant to the macrolides and lincomycin were most frequent among S. hyicus and S. aureus strains from pigs isolated in 1973-1975. They were less numerous in 1979-1980. The inducible type of macrolide-resistance was found only among strains from poultry and cattle. In 1979-1980 strains resistant to lincomycin but susceptible to macrolide-antibiotics were detected. -- Two types of sensitivity to bacitracin were discovered: highly sensitive strains were frequent in cattle and rare in poultry. Intermediately sensitive strains dominated in poultry and pigs. These two groups of strains belonged to distinct chemo...Continue Reading

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