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. 1975 Aug;8(2):122–131. doi: 10.1128/aac.8.2.122

Distribution of R Plasmids Among the O-Antigen Types of Escherichia coli Isolated from Human and Animal Sources

Christine L Hartley 1, Katherine Howe 1, A H Linton 1, K B Linton 1, M H Richmond 1
PMCID: PMC429278  PMID: 1101815

Abstract

The O-antigen types of 600 independently isolated Escherichia coli strains from human feces have been determined, and the types have been related to the antibiotic resistance patterns of the strains. The relative abundance of each O-antigen type differed in the susceptible and resistant series of strains. The majority (86%) of the resistant strains carried R plasmids. Resistant E. coli (20.3%) were found associated with O-antigen types 8, 9 and 101, whereas the susceptible strains covered a wide range of O-antigen types. Examination of 174 resistant strains isolated from calf feces also showed a prevalence of O-antigen types 8, 9, 101 (24.1%), and it seems probable that strains expressing these three O-antigen types commonly carry R plasmids in the alimentary tracts of man and calves. The number of strains not typeable with the O sera available were similar in the human (12.5%) and the calf (11.5%) series. There are no grounds for distinguishing “human” from “calf” E. coli on the basis of their O-antigen reactions.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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