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© Institut Pasteur/Antoinette Ryter
Salmonella spp. Bactéries à Gram négatif, aérobies ou anaérobies facultatifs à transmission orofécale. Les salmonelles majeures (sérotype typhi et sérotype paratyphi) sont responsables des fièvres typhoïde et paratyphoïde chez l'homme uniquement ; les salmonelles mineures (sérotype typhimurium et sérotype enteritidis) sont impliquées dans 30 à 60 % des gastroentérites et toxiinfections d'origine alimentaire. Image colorisée.
Publication : The Lancet. Infectious diseases

Highly drug-resistant Salmonella enterica serotype Kentucky ST198-X1: a microbiological study

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Lancet. Infectious diseases - 28 May 2013

Le Hello S, Harrois D, Bouchrif B, Sontag L, Elhani D, Guibert V, Zerouali K, Weill FX

Link to Pubmed [PMID] – 23721756

Lancet Infect Dis 2013 Aug;13(8):672-9

BACKGROUND: Salmonella enterica is a major global food-borne pathogen, causing life-threatening infections. Ciprofloxacin and extended-spectrum cephalosporins (ESCs) are the drugs of choice for severe infections. We previously reported a ciprofloxacin-resistant S. enterica serotype Kentucky (S Kentucky) ST198-X1 strain that emerged in Egypt and spread throughout Africa and the Middle East from 2002 to 2008. We aimed to monitor recent trends in the location of transmission and antimicrobial resistance of this strain.

METHODS: We analysed isolates of S Kentucky collected by the French national surveillance system for salmonellosis in France from Jan 1, 2000, to Dec 31, 2011, and at two sites in Casablanca, Morocco, between Jan 1, 2003, and Dec 31, 2011. We analysed patterns of travel of patients infected with a ciprofloxacin-resistant strain of S Kentucky. We identified isolates showing resistance to ESCs or decreased susceptibility to carbapenems, characterised isolates by XbaI-pulsed field gel electrophoresis and multilocus sequence typing, and assessed mechanisms of bacterial resistance to antimicrobial drugs.

FINDINGS: 954 (1%) of 128,836 serotyped Salmonella spp isolates in France were identified as S Kentucky, as were 30 (13%) of 226 Salmonella spp isolates from Morocco. During 2000-08, 200 (40%) of 497 subculturable isolates of S Kentucky obtained in France were resistant to ciprofloxacin, compared with 376 (83%) of 455 isolates in 2009-11, suggesting a recent increase in ciprofloxacin resistance in France. Travel histories suggested S Kentucky infections originated predominantly in east Africa, north Africa, west Africa, and the Middle East, but also arose in India. We report several occurrences of acquisition of extended-spectrum β-lactamase (CTX-M-1, CTX-M-15), plasmid-encoded cephalosporinase (CMY-2), or carbapenemase (OXA-48, VIM-2) genes by ciprofloxacin-resistant isolates of S Kentucky ST198-X1 from the Mediterranean area since 2009. Many of these highly drug-resistant isolates were also resistant to most aminoglycosides, to co-trimoxazole (trimethoprim-sulfamethoxazole), and to azithromycin.

INTERPRETATION: The potential risk to public health posed by ciprofloxacin-resistant S Kentucky ST198-X1 warrants its inclusion in national programmes for the control of S. enterica in food-producing animals, in particular in poultry.

FUNDING: Institut Pasteur, Institut de Veille Sanitaire, Fondation pour la Recherche Médicale, French Government Investissement d’Avenir programme.

https://www.ncbi.nlm.nih.gov/pubmed/23721756