Microbial Pathogenesis & Infectious Diseases

Infectious diseases

Infectious diseases are only caused by infectious organisms. Typically, these may be some bacteria, viruses, fungi or worms/ helminths. Under normal environments, when the immune system of the host is fully functional then, these disease symptoms may not be develop. But, if the host immune system is compromised or less then the infectious agent overwhelms the immune system, an infectious disease ensues. Most common infections diseases are caused by bacteria, viruses, protozoa, helminthes, rickettsia, and fungi. Prions are responsible for slow-progressing neurological disorders such as Creutzfeldt-Jakob Disease.