Serotype Distribution and Antimicrobial Resistance of Shigella Species in Bangui, Central African Republic, from 2002 to 2013

Sebastien Breurec Laboratoire de Bactériologie, Institut Pasteur de Bangui, Bangui, Central African Republic;
Faculté de Médecine Hyacinthe Bastaraud, Université des Antilles, Pointe-à-Pitre, France;
Laboratoire de Microbiologie Clinique et Environnementale, Centre Hospitalier Universitaire de Pointe-à-Pitre/les Abymes, Pointe-à-Pitre, France;

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Clotaire Rafaï Laboratoire de Bactériologie, Institut Pasteur de Bangui, Bangui, Central African Republic;

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Manuella Onambele Laboratoire de Bactériologie, Institut Pasteur de Bangui, Bangui, Central African Republic;

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Thierry Frank Laboratoire de Bactériologie, Institut Pasteur de Bangui, Bangui, Central African Republic;

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Alain Farra Laboratoire de Bactériologie, Institut Pasteur de Bangui, Bangui, Central African Republic;

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Arnaud Legrand Délégation à la Recherche Clinique et à l’Innovation, Centre Hospitalier Universitaire de Nantes, Nantes, France;

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François-Xavier Weill Unité des Bactéries Pathogènes Entériques, Centre National de Référence des Escherichia coli, Shigella et Salmonella, Institut Pasteur, Paris, France

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Shigella is a major cause of severe diarrhea in children less than the age of 5 years in sub-Saharan Africa. The aim of this study was to describe the (sub-)serotype distribution and antimicrobial susceptibility of Shigella serogroups from Centrafrican patients with diarrhea between 2002 and 2013. We collected 443 Shigella isolates in total. The most common serogroups were Shigella flexneri (N = 243, 54.9%), followed by Shigella sonnei (N = 90, 20.3%) and Shigella dysenteriae (N = 72, 16.3%). The high diversity of (sub-)serotypes of S. flexneri and S. dysenteriae may impede the development of an efficient vaccine. Rates of resistance were high for ampicillin, chloramphenicol, tetracycline, and cotrimoxazole but low for many other antimicrobials, confirming recommendations for the use of third-generation cephalosporins (only one organism resistant) and fluoroquinolones (no resistance). However, the detection of one extended-spectrum beta-lactamase–producing Shigella organism highlights the need for continued monitoring of antimicrobial drug susceptibility.

Author Notes

Address correspondence to Sebastien Breurec, Centre Hospitalier Universitaire de Pointe-à-Pitre/les Abymes, Laboratoire de Microbiologie Clinique et Environnementale, Route de Chauvel, Pointe-à-Pitre, France, E-mail: sebastien.breurec@chu-guadeloupe.fr or François-Xavier Weill, Centre National de Référence des Escherichia coli, Shigella et Salmonella, Unité des Bactéries Pathogènes Entériques, Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France, E-mail: francois-xavier.weill@pasteur.fr.

Financial support: The French National Reference Center for Escherichia coli, Shigella, and Salmonella is funded by the Institut Pasteur and Santé Publique France. The Unité des Bactéries Pathogènes Entériques belongs to the Integrative Biology of Emerging Infectious Diseases Laboratory of Excellence funded by the French Government as part of the Investissement d'Avenir program (grant no. ANR-10-LABX-62-IBEID).

Authors’ addresses: Sebastien Breurec, Faculté de Médecine, Universite des Antilles, Pointe-a-Pitre, France, E-mail: sbreurec@gmail.com. Clotaire Rafaï, Manuella Onambele, Thierry Frank, and Alain Farra, Laboratoire de Bactériologie, Institut Pasteur de Bangui, Bangui, République Centrafricaine, E-mails: clotairerafai@yahoo.fr, onambelemanu@yahoo.fr, thierryfrank@yahoo.fr, and farra_alain@yahoo.fr. Arnaud Legrand, DRCI, Centre Hospitalier Universitaire de Nantes, Nantes, France, E-mail: arnaud.legrand@chu-nantes.fr. François-Xavier Weill, Unité des Bactéries Pathogènes Entériques, Centre National de Référence des Escherichia coli, Shigella et Salmonella, Institut Pasteur, Paris, France, E-mail: fxweill@pasteur.fr.

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