Wiktionary
bacteriolysin
n. Any antibody that causes lysis of the cells of a bacterium
Wikipedia
Bacteriolysin
One of the Serum substances, which in part the dissolution processes of bacteria, the enzymes will pronounced the bacteria cell and cause the bacteria irreversible break.
The bacteriolysin probably function by deregulating lipoteichoic acid (LTA) in Gram-positive bacteria and phospholipids in Gram-negative bacteria.