R-PLASMIDS INCOMPATIBILITY GROUPS IN EPIDEMIC SALMONELLA

  • 1 January 1977
    • journal article
    • research article
    • Vol. B128  (2) , 165-175
Abstract
The susceptibility to antimicrobial agents of 410 strains belonging to 6 serotypes of epidemic Salmonella (S. wien, S. saint-paul, S. panama, S. heidelberg, S. isangi and S. brandenburg) was studied. Resistance to 1 or more antibiotics was shown for 228 of these strains. Study of resistance transfer was investigated for 25 multiresistant strains of different epidemic origin. Resistance was coded for by conjugative R plasmids except in the case of S. brandenburg. From 20 strains of Salmonella, 39 plasmids were transferred to Escherichia coli K12. Twenty-nine of these plasmids were classified into 7 incompatibility groups: IncFI, FII, I1, I2, N, C, M. These same groups were also found for 84 R plasmids from different enterobacteria. The epidemic character of these Salmonella serotypes does not seem to be associated with carriage of any particular R plasmid.