Data/hora: 06/06/2024 05:29:34

Provedor de dados: | 58
País: | Brazil
Título: | Biological activities of a mixture of biosurfactant from Bacillus subtilis and alkaline lipase from Fusarium oxysporum
Autores: | Quadros,Cedenir Pereira de; Duarte,Marta Cristina Teixeira; Pastore,Gláucia Maria.
Data: | 2011-03-01
Ano: | 2011
Palavras-chave: | Antimicrobial activity; Listeria innocua; Microbial biofilm; Minimum inhibitory concentration; Stainless steel surface.
Resumo: | In this study, we investigate the antimicrobial effects of a mixture of a biosurfactant from Bacillus subtilis and an alkaline lipase from Fusarium oxysporum (AL/BS mix) on several types of microorganisms, as well as their abilities to remove Listeria innocua ATCC 33093 biofilm from stainless steel coupons. The AL/BS mix had a surface tension of around 30 mN.m-1, indicating that the presence of alkaline lipase did not interfere in the surface activity properties of the tensoactive component. The antimicrobial activity of the AL/BS mix was determined by minimum inhibitory concentration (MIC) micro-assays. Among all the tested organisms, the presence of the mixture only affected the growth of B. subtilis CCT 2576, B. cereus ATCC 10876 and L. innocua. The most sensitive microorganism was B. cereus (MIC 0.013 mg.mL-1). In addition, the effect of the sanitizer against L. innocua attached to stainless steel coupons was determined by plate count after vortexing. The results showed that the presence of the AL/BS mix improved the removal of adhered cells relative to treatment done without the sanitizer, reducing the count of viable cells by 1.72 log CFU.cm-2. However, there was no significant difference between the sanitizers tested and an SDS detergent standard (p&lt;0.05).
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100045
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1590/S1517-83822011000100045
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.42 n.1 2011
Fonte: | info:eu-repo/semantics/openAccess