Basically Complement System (Score 1)

This is the same mechanism of action as the Complement System used by your Immune System. Antibodies recognize and bind to a bacteria and recruit the first part of the system, which inserts itself into the cell membrane. The first part of the system recruits other proteins, which recruit other proteins, etc., until a ring of proteins is made in the cell membrane. Since the concentration of salt, protein, sugar, and everything else is higher inside the cell than outside, water rushes in through the tiny hole and the cell membrane ruptures from the rapid expansion of volume.

Here's a brief link or two