Manalli Itzahaya Blancarte-Lagunas1, Graciela Castro-Escarpulli2, Armando Navarro-Ocaña3, Gabriela Ibáñez-Cervantes4, Laura Margarita Marquez-Valdelamar5, José Misael Hernández-Carrillo6, Juana Salazar-Salinas7, Omar Fernando Mendoza-Vásquez8, Gabriel Damazo-Hernández9, Oscar Sosa-Hernández10, Gregorio León-García11, Monica Alethia Cureño-Díaz12, Juan Manuel Bello-López13. 1. Laboratorio de Investigación Clínica y Ambiental. Departamento de Microbiología. Escuela Nacional de Ciencias Biológicas. Instituto Politécnico Nacional, Ciudad de México, México. manablancarte@hotmail.com. 2. Laboratorio de Investigación Clínica y Ambiental. Departamento de Microbiología. Escuela Nacional de Ciencias Biológicas. Instituto Politécnico Nacional, Ciudad de México, México. chelacastro@hotmail.com. 3. Departamento de Salud Pública, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, México. arnava@servidor.unam.mx. 4. Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Ciudad de México, México. gaby_aldebaran9@yahoo.com.mx. 5. Laboratorio de Secuenciación Genómica de la Biodiversidad y de la Salud, Instituto de Biología, Universidad Nacional Autónoma de México, Ciudad de México, México. lmarquez@ib.unam.mx. 6. Laboratorio de Vigilancia Epidemiológica, Subdirección de prevención y protección a la salud. Dirección médica del ISSSTE, Ciudad de México, México. jose.hernandez@issste.gob.mx. 7. Laboratorio de Vigilancia Epidemiológica, Subdirección de prevención y protección a la salud. Dirección médica del ISSSTE, Ciudad de México, México. juasalazar@issste.gob.mx. 8. Laboratorio de Vigilancia Epidemiológica, Subdirección de prevención y protección a la salud. Dirección médica del ISSSTE, Ciudad de México, México. qfb23omv@gmail.com. 9. Laboratorio de Vigilancia Epidemiológica, Subdirección de prevención y protección a la salud. Dirección médica del ISSSTE, Ciudad de México, México. gdz14@icloud.com. 10. Hospital Juárez de México, Ciudad de México. dr.oscar.sh@gmail.com. 11. Hospital de la Mujer, Ciudad de México, México. gregorioleon@yahoo.com. 12. Hospital Juárez de México , Ciudad de México, México. dracureno@yahoo.com.mx. 13. Hospital Juárez de México , Ciudad de México, México. juanmanuelbello81@hotmail.com.
Abstract
INTRODUCTION: Antimicrobial resistance in Escherichia coli, one of the causal agents of aerobic vaginitis, leads to the persistence of the infection. The investigation of integrons acquires relevance, since they are elements that are responsible for the acquisition of resistance to antibiotics. The aim of this work was to describe the structural diversity of class 1 integrons in virulent and commensal strains of E. coli isolated from patients with vaginal infection. METHODOLOGY: Ninety-two strains of E. coli were isolated from patients with aerobic vaginitis. Resistance profile against 19 antibiotics and class 1 integrons were detected by PCR. The identity and arrangement of cassettes was determined by sequencing. ERIC-PCR assays were carried out in strains with identical arrays. Finally, genotyping by Clermont algorithm and serotyping were performed. Seventeen strains showed integrons located in plasmids. RESULTS: Ten different gene cassette arrays were identified in 30 strains of E. coli. Cassettes corresponding to genes coding for adenylyltransferases (aadA), dihydrofolate reductases (dfrA), and oxacillinases (blaOXA) were detected. Array dfrA17-aadA5 was predominantly prevalent over the other arrays identified. Phylogenetic group A was the most predominant, followed by group B2 and D. CONCLUSIONS: This study demonstrates the presence of E. coli of vaginal origin carrying class 1 integrons, which are main genetic elements of capture of resistance genes, with the possibility of capturing new resistance cassettes. These evidences should serve for the modification of protocols in the diagnosis and treatment of aerobic vaginitis, and the development of policies for the rational use of antimicrobials. Copyright (c) 2020 Juan Manuel Bello-LOpez, Manalli Itzahaya Blancarte–Lagunas, Graciela Castro-Escarpulli, Armando Navarro-Ocana, Gabriela Ibanez-Cervantes, Laura Margarita Marquez-Valdelamar, Jose Hernandez-Carrillo, Juana Salazar-Salinas, O.F Mendoza-Vasquez, Gabriel Damazo-Hernandez.
INTRODUCTION: Antimicrobial resistance in Escherichia coli, one of the causal agents of aerobic vaginitis, leads to the persistence of the infection. The investigation of integrons acquires relevance, since they are elements that are responsible for the acquisition of resistance to antibiotics. The aim of this work was to describe the structural diversity of class 1 integrons in virulent and commensal strains of E. coli isolated from patients with vaginal infection. METHODOLOGY: Ninety-two strains of E. coli were isolated from patients with aerobic vaginitis. Resistance profile against 19 antibiotics and class 1 integrons were detected by PCR. The identity and arrangement of cassettes was determined by sequencing. ERIC-PCR assays were carried out in strains with identical arrays. Finally, genotyping by Clermont algorithm and serotyping were performed. Seventeen strains showed integrons located in plasmids. RESULTS: Ten different gene cassette arrays were identified in 30 strains of E. coli. Cassettes corresponding to genes coding for adenylyltransferases (aadA), dihydrofolate reductases (dfrA), and oxacillinases (blaOXA) were detected. Array dfrA17-aadA5 was predominantly prevalent over the other arrays identified. Phylogenetic group A was the most predominant, followed by group B2 and D. CONCLUSIONS: This study demonstrates the presence of E. coli of vaginal origin carrying class 1 integrons, which are main genetic elements of capture of resistance genes, with the possibility of capturing new resistance cassettes. These evidences should serve for the modification of protocols in the diagnosis and treatment of aerobic vaginitis, and the development of policies for the rational use of antimicrobials. Copyright (c) 2020 Juan Manuel Bello-LOpez, Manalli Itzahaya Blancarte–Lagunas, Graciela Castro-Escarpulli, Armando Navarro-Ocana, Gabriela Ibanez-Cervantes, Laura Margarita Marquez-Valdelamar, Jose Hernandez-Carrillo, Juana Salazar-Salinas, O.F Mendoza-Vasquez, Gabriel Damazo-Hernandez.
Entities:
Keywords:
Class 1 integrons; Escherichia coli; antimicrobial resistance