Superinfection Compatibility of R Factors in Shigella dysenteriae Type 1 from Central America and Salmonella typhi from Mexico
- 1 September 1974
- journal article
- research article
- Published by Oxford University Press (OUP) in The Journal of Infectious Diseases
- Vol. 130 (3) , 284-287
- https://doi.org/10.1093/infdis/130.3.284
Abstract
Tests of superinfection compatibility demonstrate that the R factors from the epidemic strains of Shigella dysenteriae type 1 and Salmonella typhi belong to different compatibility groups. The R factor from S. dysenteriae belongs to group O, with some partial incompatibility with the lex group, whereas the R factor from S. typhi is compatible with R factors from all groups tested. Thus the appearance of similar patterns of multiple antibiotic resistance in two unusual organisms that caused two major epidemics in the same geographic region within a short period was due to two unrelated R factors.Keywords
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