Data/hora: 06/06/2024 09:10:21

Provedor de dados: 	58	
País: 	Brazil	
Título: 	Biological characteristics and probiotic effect of Leuconostoc lactis strain isolated from the intestine of black porgy fish	
Autores: 	Zhang,Wei; Liu,Mingqi; Dai,Xianjun.	
Data: 	2013-09-01	
Ano: 	2013	
Palavras-chave: 	Black porgy; Leuconostoc lactis; Lactic acid bacteria; Biological characteristic; Probiotic.	
Resumo: 	A strain of lactic acid bacteria, Leuconostoc lactis, was isolated from the intestinal tract of black porgy, Sparus macrocephalus, and identified by conventional biochemical characteristics and 16S rDNA gene sequence analysis. The isolated strain had the ability of bile tolerance and resistance to low pH, and survived well in the trypsinase and pepsin solution. But the highly concentrated dose of trypsinase and pepsin affect the viability of the isolated strain. The isolate was resistant to several antibiotics, including Cephalothin, Ceftriaxone, Imipenem and Tobramycin. The isolate could autoaggregate itself and coaggregate with other bacteria in vitro. The autoaggregation percentage increased to 23.29% after 20 h of incubation. The percentage of coaggregation were respectively 31.21%, 29.44%, 10.74%, 16.49%, 24.36%, 24.41% and 20.99% for Vibrio parahaemolyticus, Listeria monocytogenes, Escherichia coli O157, Salmonella typhimurium, Shigella, Staphylococcus aureus and Proteusbacillus vulgaris after 20 h incubation of a mixed suspension. The supernatant of the strain inhibited the growth of several pathogens, such as V.parahaemolyticus, Vibrio harveyi, Vibrio alginolyticus, Staphylococcus aureus, Escherichia coli O157, Salmonella typhimurium, Bacillus subtilis, Proteusbacillus vulgaris and Shigella. These results indicated that the isolate, Leuconostoc lactis, might be an attractive candidate for perspectival strain for probiotics in marine aquaculture.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000300004	
Editor: 	Sociedade Brasileira de Microbiologia	
Relação: 	10.1590/S1517-83822013005000053	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Microbiology  v.44 n.3 2013	
Fonte: 	info:eu-repo/semantics/openAccess