Detecção de características de virulência em Aeromonas spp. isoladas da cadeia alimentar brasileira através de testes fenotípicos e reação em cadeia de polimerase

Autores

DOI:

https://doi.org/10.33448/rsd-v11i16.35897

Palavras-chave:

Aeromonads; Aeromonas hydrophila; Aeromonas caviae; Genes de virulência; Fatores de virulência.

Resumo

Aeromonas spp. são habitantes naturais de ambientes aquáticos e podem estar associadas a numerosas infecções em humanos e animais. A doença humana pode variar desde diarreia autolimitada até uma forma mais severa. A patogênese das infecções é multifatorial, devido à sua grande variedade de fatores de virulência. Este estudo teve como objetivo avaliar os marcadores de virulência em Aeromonas e determinar seus perfis de virulência. Foram analisadas 120 cepas de A. caviae (n = 57) e A. hydrophila (n = 63) de fonte humana, animal e ambiental entre 2008 e 2012. Todos os isolados foram examinados para detectar enzimas extracelulares de virulência por atividade fenotípica e a presença de genes de virulência hlyA, aerA, lip, gcat, ser, act, alt e exu por PCR. Observamos mais de 90% de positividade para pelo menos um fator de virulência fenotípica e todos eles tinham pelo menos dois dos genes de virulência. Entre as enzimas de virulência detectadas, DNase estava presente em 93,33% dos isolados e a atividade hemolítica foi detectada em 62,5%. A colagenase e elastase foram encontradas em 13,33% e 10,83% das cepas, respectivamente. Encontramos exu e gcat em 100% dos isolados, lip em 40,83%, aerA em 40,83%, hlyA em 40%, alt em 19,16%, act em 17,5% e ser em 11,66%. Foi possível observar diferentes combinações de fatores de virulência entre os isolados mostrando a virulência multifatorial entre os isolados. A diversidade de perfis de virulência encontrada neste estudo sugere heterogeneidade nos clones que circulam em nosso ambiente.

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Publicado

09/12/2022

Como Citar

ROGES, E. M. .; SICILIANO, S.; DOMIT, C.; OTT, P. H.; BERTO, L. H. .; AQUINO, M. H. C. de .; RODRIGUES, D. dos P. . Detecção de características de virulência em Aeromonas spp. isoladas da cadeia alimentar brasileira através de testes fenotípicos e reação em cadeia de polimerase. Research, Society and Development, [S. l.], v. 11, n. 16, p. e315111635897, 2022. DOI: 10.33448/rsd-v11i16.35897. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/35897. Acesso em: 6 jul. 2024.

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Ciências Agrárias e Biológicas