Title
Characterization of Salmonella enterica isolates causing bacteremia in Lima, Peru, using multiple typing methods
Date Issued
01 December 2017
Access level
open access
Resource Type
journal article
Author(s)
Silva C.
Betancor L.
Bisio J.
Rivera J.
Perezgasga L.
Escanda V.P.
Yim L.
Jacobs J.
Chabalgoity J.A.
Portillo F.G.d.
Puente J.L.
Publisher(s)
Public Library of Science
Abstract
In this study, different molecular typing tools were applied to characterize 95 Salmonella enterica blood isolates collected between 2008 and 2013 from patients at nine public hospitals in Lima, Peru. Combined results of multiplex PCR serotyping, two- and seven-loci multilocus sequence typing (MLST) schemes, serotyping, IS200 amplification and RAPD fingerprints, showed that these infections were caused by eight different serovars: Enteritidis, Typhimurium, Typhi, Choleraesuis, Dublin, Paratyphi A, Paratyphi B and Infantis. Among these, Enteritidis, Typhimurium and Typhi were the most prevalent, representing 45, 36 and 11% of the isolates, respectively. Most isolates (74%) were not resistant to ten primarily used antimicrobial drugs; however, 37% of the strains showed intermediate susceptibility to ciprofloxacin (ISC). Antimicrobial resistance integrons were carried by one Dublin (dfra1 and aadA1) and two Infantis (aadA1) isolates. The two Infantis isolates were multidrug resistant and harbored a large megaplasmid. Amplification of spvC and spvRA regions showed that all Enteritidis (n = 42), Typhimurium (n = 34), Choleraesuis (n = 3) and Dublin (n = 1) isolates carried the Salmonella virulence plasmid (pSV). We conclude that the classic serotyping method can be substituted by the multiplex PCR and, when necessary, sequencing of only one or two loci of the MLST scheme is a valuable tool to confirm the results. The effectiveness and feasibility of different typing tools is discussed.
Volume
12
Issue
12
Language
English
OCDE Knowledge area
Enfermedades infecciosas
Patología
Scopus EID
2-s2.0-85038968264
PubMed ID
Source
PLoS ONE
Sponsor(s)
Funding text
This work was supported by: DGAPA IN213516 and CONACyT 239659 and FC-2015-2/ 950 to JLP; Directorate General for Development Cooperation of the Belgian Government (Framework Agreement 3, Project 95502) to CG; Programa Iberoamericano de Ciencia y Tecnología para el Desarrollo (CYTED, 215RT0493) and Spanish Ministry of Economy, Industry and Competitiveness and European Regional Funds for Development (BIO2016-77639-P (MINECO/ FEDER) to FGP; and Comisión Sectorial de Investigación Científica (CSIC), Universidad de la República (Proyecto Grupos I+D 2014) to LB and LY. CS was supported by FC-2015-2/879. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Sources of information:
Directorio de Producción Científica
Scopus