What is the Chain of Infection?
* An infectous agent (pathogen)
* Reservoir (place where the pathogen can survive) - may or may not multiply.
The most common reservoir is the human body.
To survive, organisms must have food, water, temperature, pH, and light.
* Portal of Exit (blood, skin (break in the skin), mucous membrane, respiratory tract (sneezing and coughing), urinary tract (in UTIs), gastrointesinal tract (kissing, bowell elimination, surgical wounds), reproductive tract (HIV, STDs, etc) and blood.
* Mode of Transmission (such as mosquitos, *unwashed hands (#1 in health care setting), respiratory droplets, etc)
* Portal of Entry (same as Portal of Exit)
* Susceptible Host (depends on the degree of susceptibility to the infectous agent)