PMID: 9442485Jan 1, 1997Paper

Antibiotic-resistant Salmonella typhi from two outbreaks: few ribotypes and IS200 types harbor Inc HI1 plasmids

Microbial Drug Resistance : MDR : Mechanisms, Epidemiology, and Disease
A FicaF Cabello

Abstract

To investigate factors that could be involved in the emergence of antibiotic resistant S. typhi, we characterized R plasmids and antibiotic resistant S. typhi strains from two outbreaks of typhoid in Peru and Chile. Differences in the Inc HI1 plasmids of Peruvian and Chilean strains were identified by conjugation and incompatibility studies and plasmid DNA characterization. Antibiotic-resistant S. typhi harboring Inc HI1 plasmids belonged to a reduced number of Pst1 and Cla1 ribotypes and IS200 types, in contrast to the high genetic diversity found among epidemic antibiotic-susceptible S. typhi. The low diversity of antibiotic-resistant S. typhi suggests that they may express properties that are related to both their ability to harbor Inc HI1 R plasmids and to disseminate.

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Citations

Jan 15, 2008·Plasmid·James E GuntonDiane E Taylor
Aug 4, 2011·PLoS Neglected Tropical Diseases·Kathryn E HoltJohn Wain

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