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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
18/08/2021 |
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Data da última atualização: |
19/08/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PEREZ, V. K. C.; CUSTODIO, D. A. C.; SILVA, E. M. M.; OLIVEIRA, J. de; GUIMARÃES, A. S.; BRITO, M. A. V. P.; SOUZA-FILHO, A. F.; HEINEMANN, M. B.; LAGE, A. P.; DORNELES, E. M. S. |
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Afiliação: |
VERÓNICA K. C. PÉREZ, Universidade Federal de Lavras, Lavras; DIRCÉIA A. C. CUSTÓDIO, Universidade Federal de Lavras; EDUARDA M. M. SILVA, Universidade Federal de Lavras; JULIA DE OLIVEIRA, Universidade Federal de Lavras; ALESSANDRO DE SA GUIMARAES, CNPGL; MARIA A. V. P. BRITO; ANTÔNIO F. SOUZA-FILHO, Universidade de São Paulo; MARCOS B. HEINEMANN, Universidade de São Paulo; ANDREY P. LAGE, Universidade Federal de Minas Gerais; ELAINE M. S. DORNELES, Universidade Federal de Lavras. |
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Título: |
Virulence factors and antimicrobial resistance in Staphylococcus aureus isolated from bovine mastitis in Brazil. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Brazilian Journal of Microbiology, v. 51, p. 2111-2122, 2020. |
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DOI: |
https://doi.org/10.1007/s42770-020-00363-5 |
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Idioma: |
Inglês |
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Conteúdo: |
This study aimed to evaluate virulence factors and genetic markers of antimicrobial resistance in 400 Staphylococcus aureus strains isolated from bovine mastitis in four Brazilian states, as well as to assess the association between these characteristics and field information. Virulence factors and drug resistance genes were identified by PCR screening. Biofilm-forming and hemolytic phenotype were detected using Congo red Tryptic Soy Broth and defibrinated sheep blood agar, respectively. Of all isolates, 83.5% were biofilm-forming and 98.5% strains exhibited biofilm gene icaAD, and a significant association between phenotype and genotype for biofilm was observed (P = 0.0005). Hemolysin genes were observed in 82.85% (hla+hlb+), 16.5% (hla+) and 0.75% (hlb+) isolates, whereas the hemolytic phenotype exhibited was complete and incomplete hemolysis in 64.25%, complete in 28.25%, incomplete in 4.75%, and negative in 2.75% of the strains. Virulence factors genes luk, seb, sec, sed, and tst were observed in 3.5%, 0.5%, 1%, 0.25%, and 0.74% isolates, respectively. The gene blaZ was detected in 82.03% of penicillin-resistant isolates, whereas tetK and aac(6′)-Ie?aph(2′)-Ia were observed in 33.87% and 45.15% of the tetracycline and aminoglycosides-resistant isolates, respectively. Fluoroquinolone resistance gene mepA was detected for the first time in S. aureus from bovine mastitis. Resistance genes tetM (3.22%), tetL (1.61%), ermA (14.29%), ermB (14.29%), ermC (33.3%), ermT (9.52%), ermY (4.76%), msrA (9.52%), and mphC (9.52%) were also detected among resistant isolates. No association between virulence factors or antimicrobialresistant genes and year of isolation, geographic origin, or antimicrobial resistance profile was observed. Our results showed that S. aureus strains isolated from bovine mastitis in the four Brazilian states sampled are mainly biofilmforming and hemolytic, whereas virulence genes associated with enterotoxins, luk and tst, were less frequently observed. Moreover, a wide variety of resistance genes that confer resistance to almost all classes of antimicrobial agents approved for use in animals and humans were found. Overall, the data point to a great pathogenic potential of S. aureus associated with bovine mastitis and to the non-negligible risks to public health of staphylococcal infections from animal origin. MenosThis study aimed to evaluate virulence factors and genetic markers of antimicrobial resistance in 400 Staphylococcus aureus strains isolated from bovine mastitis in four Brazilian states, as well as to assess the association between these characteristics and field information. Virulence factors and drug resistance genes were identified by PCR screening. Biofilm-forming and hemolytic phenotype were detected using Congo red Tryptic Soy Broth and defibrinated sheep blood agar, respectively. Of all isolates, 83.5% were biofilm-forming and 98.5% strains exhibited biofilm gene icaAD, and a significant association between phenotype and genotype for biofilm was observed (P = 0.0005). Hemolysin genes were observed in 82.85% (hla+hlb+), 16.5% (hla+) and 0.75% (hlb+) isolates, whereas the hemolytic phenotype exhibited was complete and incomplete hemolysis in 64.25%, complete in 28.25%, incomplete in 4.75%, and negative in 2.75% of the strains. Virulence factors genes luk, seb, sec, sed, and tst were observed in 3.5%, 0.5%, 1%, 0.25%, and 0.74% isolates, respectively. The gene blaZ was detected in 82.03% of penicillin-resistant isolates, whereas tetK and aac(6′)-Ie?aph(2′)-Ia were observed in 33.87% and 45.15% of the tetracycline and aminoglycosides-resistant isolates, respectively. Fluoroquinolone resistance gene mepA was detected for the first time in S. aureus from bovine mastitis. Resistance genes tetM (3.22%), tetL (1.61%), ermA (14.29%), ermB (14.29%), ermC (33.3%), er... Mostrar Tudo |
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Palavras-Chave: |
Hemolisina; Infecção intramamária; Intramammary infection; Mastite; Staphylococci. |
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Thesagro: |
Biofilme; Bovino; Doença Animal; Estafilococo. |
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Thesaurus Nal: |
Biofilm; Hemolysins. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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| Registros recuperados : 153 | |
| 12. |  | BASTOS, D. C.; SCARPARE FILHO, J. A.; FATINANSI, J. C.; PIO, R. Ácido indolbutírico, estiolamento de ramos e ferimento na base, no enraizamento de estacas lenhosas de caramboleira. Brazilian Journal of Plant Physiology, v. 19, 2007. 1 CD-ROM. Suplemento. Edição dos Resumos do XI Congresso Brasileiro de Fisiologia Vegetal, Gramado, set. 2007.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 13. | | ATAÍDE, E. M.; SILVA, M. de S.; SOUZA, J. M. A.; BASTOS, D. C. Ácido indolbutírico e substratos no desenvolvimento de estacas de umbuzeiro em três estádios fenológicos. Agrarian Academy, Centro Científico Conhece, Goiânia, v. 4, n. 8, p. 21-33, 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 5 |
| Biblioteca(s): Embrapa Semiárido. |
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| 16. | | CALGARO, M.; ALMEIDA NETO, M. A. de; BASTOS, D. C.; PINTO, J. M.; SIMOES, W. L. Consumo hídrico da laranjeira Rubi sob o porta-enxerto Índio no Submédio do Vale do São Francisco. In: INOVAGRI INTERNATIONAL MEETING, 5.; CONGRESSO NACIONAL DE IRRIGAÇÃO E DRENAGEM, 28.; SIMPÓSIO LATINO AMERICANO DE SALINIDADE, 1., 2019, Fortaleza. Anais... Fortaleza: Instituto de Pesquisa e Inovação na Agricultura Irrigada: UFC: ABID, 2019.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 17. | | CALGARO, M.; ALVES NETO, M.; BASTOS, D. C.; PINTO, J. M.; SIMOES, W. L. Consumo hídrico da laranjeira Sincorá sob o porta-enxertos índio. In: CONGRESSO INTERNACIONAL DAS CIÊNCIAS AGRÁRIAS, 3., 2018, João Pessoa. Ciência, tecnologia e desenvolvimento rural: compartilhando conhecimentos inovadores e experiências. João Pessoa: Instituto Internacional Despertando Vocações, 2018.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 20. | | SOMBRA, K. E. S.; SILVA, A. C. C. e; LOUREIRO, F. L. C.; BASTOS, D. C. Citricultura desenvolvida na agricultura de base familiar do município de Russas, Ceará. Cultura Agronômica, Ilha Solteira, v. 25, n. 3, p. 303-316, 2016.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 4 |
| Biblioteca(s): Embrapa Semiárido. |
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| Registros recuperados : 153 | |
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