A-level Communicable Diseases

An illness due to a specific infectious agent or its toxic products that is transmitted directly or indirectly (mode of transmission) to a susceptible host through an intermediate plant or animal host, vector or the inanimate environment

• communicable disease

• non communicable disease

• infectious agent

• non infectious agent

Disease of a man or animal resulting from infection that requires direct inoculation through break in the skin or mucous membrane

All communicable disease are infectious and most but not all infectious are communicable

• true

• false

An invasion and multiplication of microorganisms in the body tissue of a man or animal that results in cellular injury.

The implantation and successful replication of organisms in the tissue of the host.

organism that is capable of being infected by a specific agent

sum total of all external condition and all influences that affect the life of an organism   (agent and host)

ability to produce toxins that damages tissues

normal defense mechanism?

• non specific immune defenses

• specific immune defenses

• absolute immune defenses

• insoluble immune defenses

-Work in harmony to defend he host from pathogens

• non specific immune defenses

• specific immune defenses