Related Experiment Video
Updated: Jan 26, 2026

Listeria monocytogenes Infection of the Brain
Published on: October 2, 2018
Bacteriocin-Like Inhibitors of Streptococcus lactis Against Listeria monocytogenes
Domenico Carminati1, Giorgio Giraffa1, Maria G Bossi1
1Istituto Sperimentale Lattiero Caseario - 20075 LODI (ITALY).
Abstract:
Culture extracts containing inhibitory substances produced by seven Streptococcus lactis strains and different concentrations of nisin were tested on six strains of Listeria monocytogenes . The antimicrobial effect was revealed by the presence of zones of inhibition after spotting of 10 μl of neutralized, filter sterilized, and catalase treated culture extracts onto agar lawns of L. monocytogenes . Culture extracts demonstrated a bactericidal action without cell lysis of pathogenic organisms. Furthermore, a wide sensitivity of inhibitor substances to proteolytic enzymes was observed. Thus the antimicrobial compounds could be defined as bacteriocin-like substances.
Related Concept Videos
Eukaryotic Transcription Inhibitors
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
Dipeptidyl Peptidase 4 Inhibitors
Antihypertensive Drugs: Direct Renin Inhibitors
Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors
Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors
Among the PDE5 inhibitors, sildenafil (Revatio) stands out as a competitive and selective inhibitor. It operates by elevating cellular levels of cGMP and augmenting signaling through the cGMP-PKG pathway, promoting vasodilation. Upon oral...
Oral Hypoglycemic Agents: α-Glucosidase Inhibitors
Acarbose and miglitol are...

