Data/hora: 06/06/2024 10:44:48

Provedor de dados: 	59	
País: 	Brazil	
Título: 	Aeromonas species isolated from PINTADO fish (Pseudoplatystoma sp): virulence factors and drug susceptibility	
Autores: 	Rall,Vera Lúcia Mores; Iaria,Sebastião Timo; Heidtmann,Sandra; Pimenta,Fabiana Cristina; Gamba,Rosa Carvalho; Pedroso,Débora Midori Myaki.	
Data: 	1998-09-01	
Ano: 	1998	
Palavras-chave: 	Aeromonas sp; Virulence factors; Drug susceptibility; Fish.	
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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141998000300015	
Editor: 	Sociedade Brasileira de Microbiologia	
Relação: 	10.1590/S0001-37141998000300015	
Formato: 	text/html	
Fonte: 	Revista de Microbiologia  v.29 n.3 1998	
Fonte: 	info:eu-repo/semantics/openAccess