100
The transmission of infection depends on six elements which link together like a chain. If any link is broken then the chain is broken and infection cannot be transmitted. In this chain of infection, the site at which microorganism can leave the body is called....
What is portal of exit
6 elements are
1. Infectious disease (microorganism)
2. Reservoir (Where it resides, ex. food, water, toilet, etc)
3. Portal of Exit (where it leaves the reservoir)
4. Mode of Transmission (How it transfers from host to host)
5. Portal of Entry (mucous membranes, open wounds, body cavity)
6. Susceptible Host (Young, old, weakened immune system)