Here are some examples:

* Bacteria: Single-celled organisms that can cause a variety of infections.

* Viruses: Tiny infectious agents that can only replicate inside living cells.

* Fungi: Organisms like mushrooms and molds that can cause infections in the body.

* Parasites: Organisms that live inside or on another organism, benefiting at the expense of their host.

* Prions: Misfolded proteins that can cause serious diseases.

So, while all pathogens cause disease, they are diverse in their nature and how they affect their hosts.