A bacteria, virus or fungus.

A bacterium, virus, or other microorganism that can cause a disease.

Disorders caused by organisms

A medical condition or disease that is not caused by infectious agents.

The bodily system that protects the body from foreign substances, cells, and tissues.

A disorder of structure or function in a human, animal, or plant.

A colorless cell that circulates in the blood and body fluids and is involved in diseases.

A large group of unicellular microorganisms that can cause diseases.

A medicine that inhibits the growth or destroys microorganisms.

An infective agent

A substance used to provide against about one or several diseases.