University of Michigan - Ann Arbor

The two types of toxins produced by pathogens are:
- Endotoxins
- Exotoxins

Types of Toxins Produced by Pathogens

Exotoxins are protein molecules that are made by bacteria and released outside the bacteria and into the host to target host processes and/or structures. Some gram-negative pathogens produce exotoxins, but the majority are made by **gram-positive** pathogens.

Exotoxins

An endotoxin is a type of toxin that is found within the outer membrane of certain Gram-negative bacteria. Endotoxins are made within the cell remain associated with the cell until released when the cells die and disintegrate.

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