Definitions for "Infectious disease"
Any disease caused by the entrance, growth, and multiplication of microorganisms in the body; a germ disease. It may not be contagious.
Sometimes, as distinguished from contagious disease, such a disease communicated by germs carried in the air or water, and thus spread without contact with the patient, as measles.
or contagious disease, generally a bacterial, viral or fungal organism that is transferred from one organism to another by four main methods of transmission (contact, vehicular, airborne or vector). Contagiousness refers to the ease of transmission of the infective agent. (More? Abnormal Development)
a function of the host, the agent and the environment acting together in a particular combination
An illness due to a specific infectious agent or its toxic products that arises through transmission of that agent or its products from an infected person, animal or reservoir to a susceptible host. It may be transmitted directly, or indirectly through an intermediate plant or animal host, vector or the inanimate environment
Change from a state of health to a state in which part or all of a host's body cannot function normally because of the presence of an infectious agent or its products.