Artículo
Multidrug resistance and molecular characterization of streptococcus agalactiae isolates from dairy cattle with mastitis
Hernandez, Luciana Belén
; Bottini, Enriqueta
; Cadona, Jimena Soledad
; Cacciato, Claudio Santiago; Monteavaro, Cristina Esther; Bustamante, Ana Victoria
; Sanso, Andrea Mariel
Fecha de publicación:
04/2021
Editorial:
Frontiers Media
Revista:
Frontiers in Cellular and Infection Microbiology
ISSN:
2235-2988
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Streptococcus agalactiae is a pathogen-associated to bovine mastitis, a health disorder responsible for significant economic losses in the dairy industry. Antimicrobial therapy remains the main strategy for the control of this bacterium in dairy herds and human In order to get insight on molecular characteristics of S. agalactiae strains circulating among Argentinean cattle with mastitis, we received 1500 samples from 56 dairy farms between 2016 and 2019. We recovered 56 S. agalactiae isolates and characterized them in relation to serotypes, virulence genes, and antimicrobial susceptibility. Serotypes III and II were the most prevalent ones (46% and 41%, respectively), followed by Ia (7%). In relation to the 13 virulence genes screened in this study, the genes spb1, hylB, cylE, and PI-2b were present in all the isolates, meanwhile, bca, cpsA, and rib were detected in different frequencies, 36%, 96%, and 59%, respectively. On the other hand, bac, hvgA, lmb, PI-1, PI-2a, and scpB genes could not be detected in any of the isolates. Disk diffusion method against a panel of eight antimicrobial agents showed an important number of strains resistant simultaneously to five antibiotics. We also detected several resistance-encoding genes, tet(M), tet(O), ermB, aphA3, and lnu(B) (9%, 50%, 32%, 32%, and 5%, respectively). The results here presented are the first molecular data on S. agalactiae isolates causing bovine mastitis in Argentina and provide a foundation for the development of diagnostic, prophylactic, and therapeutic methods, including the perspective of a vaccine.
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Identificadores
Colecciones
Articulos(CIVETAN)
Articulos de CENTRO DE INVESTIGACION VETERINARIA DE TANDIL
Articulos de CENTRO DE INVESTIGACION VETERINARIA DE TANDIL
Citación
Hernandez, Luciana Belén; Bottini, Enriqueta; Cadona, Jimena Soledad; Cacciato, Claudio Santiago; Monteavaro, Cristina Esther; et al.; Multidrug resistance and molecular characterization of streptococcus agalactiae isolates from dairy cattle with mastitis; Frontiers Media; Frontiers in Cellular and Infection Microbiology; 11; 4-2021; 1-9
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