Infectious diseases are caused by a wide range of organisms including prions, viruses, bacteria, fungi, protozoa, helminths (worms) and arthropods. These organisms cause infectious diseases and belong to different groups such as prions, viruses, bacteria, fungi, protozoa, helminths and arthropods. Infectious diseases are caused by a variety of microorganisms.

1. Infectious diseases
By Habtamu Biazin (lecturer)

2. Infectious diseases
• Infectious diseases are caused by organisms
belonging to a very wide range of different
groups.
– prions,
– viruses,
– bacteria,
– fungi,
– protozoa,
– helminths (worms) and
– arthropods.