Infectious Diseases are generally caused by microbes called pathogens that enter into the body and prevents it from functioning properly. Infections are caused by bacteria, which can be airborne or blood-borne, or from viruses, which are typically airborne or by contact with a carrier or fomite. (A fomite is an object upon which viruses or bacteria can live for a short period of time.)
Depending on the disease it can be caused by any of the following types of infectious organisms: bacteria, fungi, protozoa, parasites, rickettsia, viruses. It is also believed that certain types of defective proteins called prions, although they are not organisms, are the cause of some Infectious Diseases.
A pathogen causes infectious disease. For instance, influenza virus is the pathogen that causes flu.
A viroid is an infectious agent that consists of a small strand of RNA and that causes disease in plants.
infectious and vector diseases and natural causes.
infectious genetic hormonal
Its called "pathogen".
Pathogen
Botulism
infectious proteins called prions
Infectious diseases involve a causative organism, from groups such as bacteria, viruses, fungi, and such. Noninfectious diseases involve causes other than specific infectious organisms.
It is clear that Creutzfeldt-Jakob disease is caused by an infectious agent, but it is not yet clear what type of agent that is.
Asthma is not infectious disease. It does not spread from one person to other person.
Polio is caused by the Poliomyelitis virus.