Could you tell me what are infectious diseases caused by?

See below: Prions, viruses, bacteria, fungi, protozoa , parasites.

Organisms: Infectious diseases are caused by transmission of organisms: person to person contact, bites/scratches from animals or insects or contaminated food or water. Some of the culprits include: viruses, bacteria, parasites (like protozoa or worms), fungi or prions. Ebola is an example of a Viral dz. Malaria is protozoal dz. Plague is a bacterial dz. Kuru is a prion dz. Yeast is a fungal infection.