| Registro completo |
| Provedor de dados: |
Rev. Microbiol.
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| País: |
Brazil
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| Título: |
Aeromonas species isolated from PINTADO fish (Pseudoplatystoma sp): virulence factors and drug susceptibility
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| Autores: |
Rall,Vera Lúcia Mores
Iaria,Sebastião Timo
Heidtmann,Sandra
Pimenta,Fabiana Cristina
Gamba,Rosa Carvalho
Pedroso,Débora Midori Myaki
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| Data: |
1998-09-01
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| Ano: |
1998
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| Palavras-chave: |
Aeromonas sp
Virulence factors
Drug susceptibility
Fish
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| Resumo: |
Aeromonas has been described as an emergent foodborne pathogen of increasing importance. In this study, we report that 48% of 50 Pintado fish samples collected at the retail market of São Paulo city were positive for Aeromonas sp, as detected by the direct plating method. When the presence/absence method was used, the positivity was 42%. A. caviae was the most frequent species, followed by A. hydrophila and A. sobria. Production of cytotoxic enterotoxin, observed in suckling mouse assay, was detected in 67% of A. sobria strains, in 60% of A. hydrophila strains and in 40% of A. caviae strains. In vitro tests, performed with HEp-2 cells, showed that 88% of A. hydrophila, 27% of A. sobria and 13% of A. caviae strains were positive for this toxin. The in vivo production of cytotonic enterotoxin, tested after heating the filtrates at 56ºC for 20 minutes, was detected in 17% of A. sobria, in 10% of A. caviae and in none of A. hydrophila strains in vivo. All analyzed strains did not alter HEp-2 cells. 20% and 16% of A. sobria and A. caviae isolates, respectively, presented capacity to adhere to HEp-2 cells. In counterpart, invasion of HEp-2 cells was not observed in any isolate. The Aeromonas isolates were sensitive to the majority of the antimicrobiol agents tested.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141998000300015
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| Editor: |
Sociedade Brasileira de Microbiologia
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| Relação: |
10.1590/S0001-37141998000300015
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| Formato: |
text/html
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| Fonte: |
Revista de Microbiologia v.29 n.3 1998
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| Direitos: |
info:eu-repo/semantics/openAccess
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