Abstract
Incompatibility between R factors has been reported by several authors, and four incompatibility groups have already been described by Datta and Hedges among Rfi(-) factors. The stability of 12 plasmids in pairs was studied after 116 crosses, and five new groups were found, designated 5, 6, 7, 8, and 9. Each plasmid studied belongs to one single group. Incompatibility between plasmids in pairs is a clear-cut phenomenon, is easy to observe, and can provide a reliable method for recognizing and classifying resistance factors, and for tracing their spread among bacterial species.
MeSH Terms
Anti-Bacterial Agents/pharmacology
Conjugation, Genetic
Crosses, Genetic
Drug Resistance, Microbial
Escherichia coli/drug effects
Extrachromosomal Inheritance
Genetics, Microbial
Klebsiella pneumoniae/drug effects
Proteus/drug effects
Pseudomonas aeruginosa/drug effects
Salmonella/drug effects
Salmonella paratyphi A/drug effects
Shigella flexneri/drug effects
Transduction, Genetic
Chemicals
Anti-Bacterial Agents
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Chabbert Y A
Scavizzi M R
Witchitz J L
Gerbaud G R
Bouanchaud D H
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