i think they are called Pathogens
Bacteria that cause disease are called pathogenic bacteria. Bacteria can cause diseases in humans, in other animals, and also in plants. Some bacteria can only make one particular host ill; others cause trouble in a number of hosts, depending on the host specificity of the bacteria. The diseases caused by bacteria are almost as diverse as the bugs themselves and include food poisoning, tooth ache anthrax, even certain forms of cancer. It is impossible to sum up all bacterial diseases and it would be pretty boring. The Infectious Diseases fact sheets gives brief descriptions of diseases, including infectious diseases.
bacteria
The scope and significance of communicable diseases is that they are all illnesses that are caused by some kind of infectious agent. Communicable diseases are also called infectious diseases (or transmissible diseases).
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.
The best place to find the symptoms of infectious diseases is a site called WebMD. On this site one can easily find all of the symptoms of nearly ever disease including infectious diseases.
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.
Germs that spread from person to person to cause diseases are contagions.People who are then infected with the germ, only during the active phase of the germ's "life", are then referred to as being contagious.
There are many scientists that study the spread of infectious diseases (called epidemiology), and in the United States the CDC (Center for Disease Control) is the central reporting agency.
Pathogen
N/aA pathogen by definition is a disease causing organism
pathogens
germs
Infectious disease specialists are physicians who completed additional post-graduate training in the diagnosis and treatment of infectious diseases. They are typically called in as consultants to assist with treatment decisions.
Organisms which are causing disease are called pathogens. Bacteria viruses