analysis of the clonal relationship among clinical isolates of salmonella enterica serovar infantis by different typing methods análisis de la relación clonal entre aislamientos clínicos de salmonella enterica serovar infantis mediante diferentes métodos de tipificación

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ID: 144643
2003
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Abstract
Salmonella Infantis has been the second most common serovar in Argentina in the last two years, being isolated mostly from paediatric hospitalised patients. In order to determine the clonal relationship among Salmonella Infantis strains, we examined 15 isolates from paediatric patient faeces in Argentina (12 geographically related and 3 geographically non-related) by using antimicrobial susceptibility, plasmid profiling, repetitive extragenic palindromic (REP) PCR, enterobacterial repetitive intergenic consensus (ERIC) PCR, and low-frequency restriction analysis of chromosomal DNA by pulsed field gel electrophoresis (PFGE). Four Spanish strains were included as controls of clonal diversity in molecular techniques. Antibiotype and plasmid profile was not useful as epidemiological tools. PFGE and REP-PCR were able to discriminate between Argentinean and Spanish isolates of Salmonella Infantis allowing to detect genetically related strains in three different cities. This finding indicates that a possible spread of a clone of this serovar in the North-eastern Region of Argentina has taken place in 1998.
Salmonella Infantis ha sido el segundo serovar más común en la Argentina en los últimos dos años, siendo aislada principalmente, a partir de pacientes pediátricos hospitalizados. La relación clonal entre 15 aislamientos de Salmonella Infantis obtenidos de heces de pacientes pediátricos en Argentina se estudió mediante la susceptibilidad antimicrobiana, el perfil plasmídico, amplificación por reacción en cadena de la polimerasa (PCR) de las secuencias repetitivas REP y ERIC, y electroforesis de ADN total en campo pulsátil (PFGE). Cuatro cepas españolas fueron incluidas como control de diversidad clonal. El antibiotipo y el perfil plasmídico no fueron herramientas útiles en la tipificación. PFGE y REP-PCR fueron capaces de discriminar entre las cepas argentinas y españolas de Salmonella Infantis, permitiendo detectar cepas genéticamente relacionadas en tres ciudades diferentes. Este hallazgo indica que una posible diseminación clonal de este serovar ha tenido lugar en la región nordeste de Argentina en 1998.
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Authors ;Luis A. Merino;María C. Ronconi;Margarita M. Navia;Joaquim Ruiz;Josep M. Sierra;Norma B. Cech;Norma S. Lodeiro;Jordi Vila
Journal 2017 12th international conference for internet technology and secured transactions, icitst 2017
Year 2003
DOI
10.1590/S0036-46652003000300001
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652003000300001
Keywords
polymerase chain reaction tropical medicine

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