Do not cause disease in healthy individuals.
Study of disease.
Studies the spread of disease in a populations.
Usually do not cause disease in a healthy host.
Development of disease.
No signs or symptoms
Mild signs or symptoms.
Period Of Illness
Most severe sign & symptoms
Period Of Decline
Signs & symptoms
Final recovery stage, microbes may still be present.
Transmitted to people organisms etc.
A disease which cannot be transmitted.
Spread from host to host, and is very contagious.
Not spread from host to host.
Number of cases.
Total number of people infected.
Number of deaths due to disease.
Normally present in the population
Higher than normal incidence in short period of time.
Soil, water, surface.
Person to person
Contact with nonliving object.
Water, air, or food
Passive transport on arthropod surface.
Pathogen lives inside arthropod for a short period of time.
Health care acquired infections