There are two main types of toxins:

* Exotoxins: These are proteins secreted by bacteria that can cause damage to host cells and tissues. They are often highly specific in their action and can cause a variety of symptoms, including fever, diarrhea, and muscle paralysis.

* Endotoxins: These are lipopolysaccharides (LPS) found in the outer membrane of gram-negative bacteria. They are released when the bacteria die and can cause a strong immune response that can lead to septic shock and death.

In addition to toxins, pathogens can also injure the host by:

* Directly damaging cells: Some pathogens can directly invade and destroy host cells.

* Interfering with host cell function: Some pathogens can interfere with normal host cell processes, such as protein synthesis or DNA replication.

* Eliciting an exaggerated immune response: Some pathogens can trigger a strong immune response that can actually damage the host tissues.

Overall, the production of toxins is a major mechanism by which pathogens cause disease.