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Hernández-Castro R, Rodríguez-Santiago J, Téllez-Sosa J, Bravo-Romero S, Silva-Sánchez J, Sánchez-Pérez A, Avalos-Téllez R, Martínez-Chavarría LC, Xicohtencatl-Cortes J, Garza-Ramos U. Molecular and genome characterization of colistin-resistant Escherichia coli isolates from wild sea lions (Zalophus californianus). Braz J Microbiol 2020; 51:2009-2014. [PMID: 32897511 DOI: 10.1007/s42770-020-00371-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 08/26/2020] [Indexed: 02/06/2023] Open
Abstract
Using molecular and whole-genome sequencing tools, we investigated colistin-resistant Escherichia coli isolates from wild sea lions. Two unrelated E. coli colistin-resistant isolates, ST8259 and ST4218, were identified, both belonging to the B2 phylogroup and different serotypes. Polymorphisms in PmrA, PmrB, and PhoQ proteins were identified, and the role of PmrB and PhoQ in contributing to colistin resistance was determined by complementation assays. However, the mutations characterized in the present study are not involved in colistin resistance, which have been described in E. coli isolates from clinical settings. Therefore, the acquired mutations in pmrB and phoQ genes in resistance to colistin in bacteria related to marine environment animals are different. This work contributes to the surveillance and characterization of colistin resistance in Escherichia coli obtained from animals from aquatic environments.
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Affiliation(s)
- Rigoberto Hernández-Castro
- Departamento Ecología de Agentes Patógenos, Hospital General "Dr. Manuel Gea González", Ciudad de México, Mexico
| | - Jonathan Rodríguez-Santiago
- Laboratorio de Resistencia Bacteriana; Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Instituto Nacional de Salud Pública (INSP), Cuernavaca, Morelos, Mexico
| | - Juan Téllez-Sosa
- Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Instituto Nacional de Salud Pública (INSP), Cuernavaca, Morelos, Mexico
| | - Sugey Bravo-Romero
- Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Instituto Nacional de Salud Pública (INSP), Cuernavaca, Morelos, Mexico
| | - Jesús Silva-Sánchez
- Laboratorio de Resistencia Bacteriana; Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Instituto Nacional de Salud Pública (INSP), Cuernavaca, Morelos, Mexico
| | - Alejandro Sánchez-Pérez
- Laboratorio de Resistencia Bacteriana; Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Instituto Nacional de Salud Pública (INSP), Cuernavaca, Morelos, Mexico
| | - Rosalia Avalos-Téllez
- Área de Protección de Flora y Fauna. Islas del Golfo de California, Baja California, CONANP, SEMARNAT. Bahía de Los Ángeles, 22980, Ensenada, Baja California, Mexico
| | - Luary Carolina Martínez-Chavarría
- Departamento de Patología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Coyoacán, 04510, Ciudad de México, Mexico
| | - Juan Xicohtencatl-Cortes
- Laboratorio de Bacteriología Intestinal, Hospital Infantil de México Dr. Federico Gómez, Cuauhtémoc, 06720, Ciudad de México, Mexico
| | - Ulises Garza-Ramos
- Laboratorio de Resistencia Bacteriana; Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Instituto Nacional de Salud Pública (INSP), Cuernavaca, Morelos, Mexico.
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