R-factor-mediated antibiotic resistance in E. coli strains isolated from piglets in Sweden
Franklin, A.; Glatthard, V.
Zentralblatt für Bakteriologie Parasitenkunde Infektionskrankheiten und Hygiene. Erste Abteilung Originale. Reihe A Medizinische Mikrobiologie und Parasitologie 238(2): 208-215
1977
ISSN/ISBN: 0300-9688 PMID: 329617 Accession: 000475353
In E. coli strains isolated from piglets the frequency of mono-resistant strains decreased from 50% in 1964-1968 to 27% in 1974-1975, while dual or multiple resistance increased from 13 to 22%. Proportions of resistance determinants in 1974-75 were: tetracycline 23% (49% in 1964-68), sulfisomidine 38% (24%), streptomycin 9% (3%), ampicillin 6% (1%), chloramphenicol 6% (0.5%) and neomycin 4% (0%). All strains were sensitive to trimethoprim.