BACTERIOCINS AND BACTERIOCIN-LIKE SUBSTANCES

Bacteriocins and Bacteriocin-like Substances.

Bacteriocin-like substances produced by Rhizobium japonicum and other slow-growing rhizobia.

Bacteriocin-like substances were commonly produced by slow-growing Rhizobium japonicum and cowpea rhizobia on an L-arabinose medium. Antagonism between strains of R. japonicum was not detected in vitro; however, such strains were often sensitive to some bacteriocins produced by cowpea rhizobia. Inhibitory zones (2 to 8 mm from colony margins), produced by 58 of 66 R. japonicum test strains, wer...

Bacteriocin-Like Substances from Tomato Race 3 Strains of Xanthomonas campestris pv. vesicatoria.

ABSTRACT Tomato race 3 (T3) strains of Xanthomonas campestris pv. vesicatoria are antagonistic in vitro to tomato race 1 (T1) strains of the bacterium. All T1 strains and 11 strains of other X. campestris pathovars tested were inhibited by T3 strains. Sensitivity of tomato race 2 (T2) strains was variable. No strains from other bacterial genera tested were inhibited. Cell-free filtrates from T3...

Production of bacteriocin-like substances by lactic acid bacteria isolated from regional ovine cheese

Lactic acid bacteria (LAB) were isolated from ovine milk and cheeses manufactured in the South Region of Brazil. Among 112 bacterial isolates investigated, 59 were chosen through a screening for LAB. Among these 59 strains of LAB, 21% showed antimicrobial, proteolytic and lipolytic activities. Based on this screening, Lactobacillus plantarum LCN 17 and Lactobacillus rhamnosus LCN 43 were select...

Bacteriocin-like substances produced by Lactococcus lactis subsp. lactis CF4MRS isolated from fish intestine: Antimicrobial activities and inhibitory properties

In the present study, evaluation of antimicrobial activities of Lactococcus lactis subsp. lactis CF4MRS bacteriocin-like substances (BLIS) against various fish pathogens was performed using an agar well diffusion assay. The cell-free supernatant (CFS) was first pre-treated using four different bioassays. In the first treatment T1, CFS was treated with catalase, and the pH was adjusted to 6.5 wi...