<b>ARE ENTEROCOCCUS FAECIUM CRL 183 AND LACTOBACILLUS HELVETICUS SSP. JUGURTI 416 ABLE TO PRODUCE ANTIMICROBIAL SUBSTANCE?</b>

Abstract

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: normal; text-align: justify; mso-layout-grid-align: none;"> Production of antimicrobial substance by E. faecium CRL 183 and L. helveticus ssp jugurti 416 was tested against pathogenic bacteria and microorganisms isolated from Wistar rat faeces, using a spot-on-the-lawn assay. Three pathogenic bacteria (Listeria monocytogenes 1/2a, Salmonella enteridites 193/95, Escherichia coli O157:H7) and twenty-fi ve colonies, isolated from animal faeces, belonging to the following groups Enterococcus, Lactobacillus, Clostridium, Bacteroides and Enterobacteriaceae, were used as indicator microorganisms. The results showed that E. faecium CRL 183 and L. helveticus ssp jugurti 416 did not produce signifi cant antimicrobial activity against the indicator microorganisms tested. More tests needed to be carried out with other indicator bacteria and other culture media to confi rm the lack of antimicrobial production. </p>

Keywords

• Enterococcus faecium CRL 183
• Lactobacillus helveticus ssp jugurti 416
• antimicrobial compounds
• substancias antimicrobiana.