Final answer:
The hemolysis of Listeria M is referred to as beta-hemolysis. This is observed when Listeria monocytogenes colonies grown on a Blood Agar Plate (BAP) display small grayish colonies surrounded by a clear zone.
Step-by-step explanation:
The hemolysis of Listeria M is referred to as beta-hemolysis. This is observed when Listeria monocytogenes colonies grown on a Blood Agar Plate (BAP) display small grayish colonies surrounded by a clear zone. The clear zone indicates complete lysis of blood in the medium. Listeria's ability to produce a toxin called listeriolysin O (LLO) and a surface protein known as actin assembly-inducing protein (ActA) contribute to its pathogenicity.