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Dieye Y, Hull DM, Wane AA, Harden L, Fall C, Sambe-Ba B, Seck A, Fedorka-Cray PJ, Thakur S. Genomics of human and chicken Salmonella isolates in Senegal: Broilers as a source of antimicrobial resistance and potentially invasive nontyphoidal salmonellosis infections. PLoS One 2022; 17:e0266025. [PMID: 35325007 PMCID: PMC8947133 DOI: 10.1371/journal.pone.0266025] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 03/11/2022] [Indexed: 11/19/2022] Open
Abstract
Salmonella enterica is the most common foodborne pathogen worldwide. It causes two types of diseases, a self-limiting gastroenteritis and an invasive, more threatening, infection. Salmonella gastroenteritis is caused by several serotypes and is common worldwide. In contrast, invasive salmonellosis is rare in high-income countries (HIC) while frequent in low- and middle-income countries (LMIC), especially in sub-Saharan Africa (sSA). Invasive Nontyphoidal Salmonella (iNTS), corresponding to serotypes other than Typhi and Paratyphi, have emerged in sSA and pose a significant risk to public health. We conducted a whole-genome sequence (WGS) analysis of 72 strains of Salmonella isolated from diarrheic human patients and chicken meat sold in multipurpose markets in Dakar, Senegal. Antimicrobial susceptibility testing combined with WGS data analysis revealed frequent resistance to fluoroquinolones and the sulfamethoxazole-trimethoprim combination that are among the most used treatments for invasive Salmonella. In contrast, resistance to the historical first-line drugs chloramphenicol and ampicillin, and to cephalosporins was rare. Antimicrobial resistance (AMR) was lower in clinical isolates compared to chicken strains pointing to the concern posed by the excessive use of antimicrobials in farming. Phylogenetic analysis suggested possible transmission of the emerging multidrug resistant (MDR) Kentucky ST198 and serotype Schwarzengrund from chicken to human. These results stress the need for active surveillance of Salmonella and AMR in order to address invasive salmonellosis caused by nontyphoidal Salmonella strains and other important bacterial diseases in sSA.
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Affiliation(s)
- Yakhya Dieye
- Pole of Microbiology, Institut Pasteur, Dakar, Sénégal
- Département Génie Chimique et Biologie Appliquée, École Supérieure Polytechnique, Université Cheikh Anta Diop, Dakar, Sénégal
| | - Dawn M. Hull
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, United States of America
| | | | - Lyndy Harden
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, United States of America
| | - Cheikh Fall
- Pole of Microbiology, Institut Pasteur, Dakar, Sénégal
| | | | | | - Paula J. Fedorka-Cray
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, United States of America
| | - Siddhartha Thakur
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, United States of America
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Diop A, Sambe-Ba B, Seck A, Dia ML, Timbiné LG, Niang AA, Ndiaye EHM, Sonko MA, Wane AA, Bercion R, Ndiaye O, Cissé MF, Gassama-Sow A. First Description of the Extended Spectrum-Beta-Lactamase Gene blaCTX-M-109 in Salmonella Grumpensis Strains Isolated from Neonatal Nosocomial Infections in Dakar, Senegal. PLoS One 2016; 11:e0157683. [PMID: 27355480 PMCID: PMC4927072 DOI: 10.1371/journal.pone.0157683] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 06/02/2016] [Indexed: 11/19/2022] Open
Abstract
Nosocomial infections are very common in African hospitals, particularly in neonatal units. These infections are most often caused by bacteria such as Escherichia coli, Klebsiella spp and Staphylococcus spp. Salmonella strains are rarely involved in nosocomial infections. Here, we report the first description of S. Grumpensis in neonatal infections in Senegal. Seventeen Salmonella strains were isolated from hospitalized infants' stool samples. The following resistance phenotype was described in strains: AMXRTICRCFR FOXRCFXRCTXRCAZRIMPSATMRNARNORRCIPRTMRGMRTERSXTR. All isolates were susceptible to imipenem, 15 out of 17 produced an extended spectrum ß-lactamase (ESBL). blaOXA-1, blaSHV-1, blaTEM-1, blaCTX-M1 genes were detected in strains 8, 13, 5 and 8, respectively. blaCTX-M1 sequencing revealed the presence of blaCTX-M-109. Thirteen of the 17 Salmonella Grumpensis strains were analyzed by PFGE. These 13 isolates belonged to a single pulsotype and were genotypically identical. This is the first report of neonatal S. Grumpensis infections in Senegal, and the first report of blaCTX-M-109 in the genus Salmonella.
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Affiliation(s)
- Amadou Diop
- Unité de Bactériologie Expérimentale (UBE), Institut Pasteur de Dakar, Dakar, Sénégal
- Laboratoire de Bactériologie-Virologie Centre Hospitalier National d’Enfants Albert Royer de Fann Dakar, Dakar, Sénégal
- Faculté de Médecine, Pharmacie et d’Odontologie Université Cheikh Anta Diop de Dakar, Dakar, Sénégal
| | - Bissoume Sambe-Ba
- Unité de Bactériologie Expérimentale (UBE), Institut Pasteur de Dakar, Dakar, Sénégal
| | - Abdoulaye Seck
- Laboratoire d’Analyses Biologiques et Médicales (LABM), Institut Pasteur de Dakar, Dakar, Sénégal
- Faculté de Médecine, Pharmacie et d’Odontologie Université Cheikh Anta Diop de Dakar, Dakar, Sénégal
| | - Mouhamadou Lamine Dia
- Laboratoire de Bactériologie-Virologie Centre Hospitalier National de FANN, Dakar, Dakar, Sénégal
- Faculté de Médecine, Pharmacie et d’Odontologie Université Cheikh Anta Diop de Dakar, Dakar, Sénégal
| | - Lassina Gadi Timbiné
- Unité de Bactériologie Expérimentale (UBE), Institut Pasteur de Dakar, Dakar, Sénégal
| | - Aïssatou Ameth Niang
- Unité de Bactériologie Expérimentale (UBE), Institut Pasteur de Dakar, Dakar, Sénégal
| | - El Hadji Momar Ndiaye
- Laboratoire de Bactériologie-Virologie Centre Hospitalier National d’Enfants Albert Royer de Fann Dakar, Dakar, Sénégal
| | - Mouhamadou Abdoulaye Sonko
- Laboratoire de Bactériologie-Virologie Centre Hospitalier National d’Enfants Albert Royer de Fann Dakar, Dakar, Sénégal
| | - Abdoul Aziz Wane
- Unité de Bactériologie Expérimentale (UBE), Institut Pasteur de Dakar, Dakar, Sénégal
| | - Raymond Bercion
- Laboratoire d’Analyses Biologiques et Médicales (LABM), Institut Pasteur de Dakar, Dakar, Sénégal
| | - Ousmane Ndiaye
- Unité de Néonatologie, Centre Hospitalier Abass Ndao, Dakar, Sénégal
- Faculté de Médecine, Pharmacie et d’Odontologie Université Cheikh Anta Diop de Dakar, Dakar, Sénégal
| | - Moussa Fafa Cissé
- Laboratoire de Bactériologie-Virologie Centre Hospitalier National d’Enfants Albert Royer de Fann Dakar, Dakar, Sénégal
- Faculté de Médecine, Pharmacie et d’Odontologie Université Cheikh Anta Diop de Dakar, Dakar, Sénégal
| | - Amy Gassama-Sow
- Unité de Bactériologie Expérimentale (UBE), Institut Pasteur de Dakar, Dakar, Sénégal
- Department de Génie Chimique et Biologie Appliquée, Ecole Supérieure Polytechnique, Université Cheikh Anta Diop de Dakar, Dakar, Sénégal
- * E-mail:
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