Direct action toxin type

Indirect actiontoxin type

1. Poreforning toxins:

Lipid A (Gram-negative LPS)

leukocidins, hemolysins

Superantigenic toxins:

2. AB subunit toxins:

Staphylococcal enterotoxins, TSST

A subunit-affect cyclic AMP

Streptococcal pyrogenic toxins

A subunit-inactivate protein synthesis

B subunit-receptor binding function