Communicable Disease
A communicable disease is one that is spread from one person to
another through a variety of ways that include: contact with blood and
bodily fluids; breathing in an airborne virus; or by being bitten by an
insect.
It is important in the
planning and evaluation of disease prevention and control programs, in
the assurance of appropriate medical therapy, and in the detection of
common-source outbreaks. Some examples of the communicable
diseases include Hepatitis A, B & C, influenza, measles, and
salmonella and other food borne illnesses.
How these diseases spread depends on the specific disease or
infectious agent. Some ways in which communicable diseases spread are
by:
- physical contact with an infected person, such as through touch
(staphylococcus), sexual intercourse (gonorrhea, HIV), fecal/oral
transmission (hepatitis A), or droplets (influenza, TB)
- contact with a contaminated surface or object (Norwalk virus), food
(salmonella, E. coli), blood (HIV, hepatitis B), or water (cholera);
- bites from insects or animals capable of transmitting the disease (mosquito: malaria and yellow fever; flea: plague); and
- travel through the air, such as tuberculosis or measles.