Please enable JavaScript.
Coggle requires JavaScript to display documents.
Disease and Epidemiology - Coggle Diagram
Disease and Epidemiology
Intro to Epidemiology
-
A healthy citizenry benefits society, while disease creates major burdens
-
Over the past two centuries, epidemiology discoveries have led to public health policies that reduced many diseases
-
-
-
-
-
Pioneers of Epidemiology
John Snow: british physician that considered the Father of Epidemiology, identified the source of the cholera outbreak in London in 1854-Broad Street Cholera
Florence Nightingale: nurse in Crimean War that cared for wounded soldiers and recorded causes of illness during the war
-
Types of Epidemic Spread
-
Point source: short exposure, ex: contaminated potato salad
Continuous: extended exposure, ex: polluted water source
Intermittent: irregular exposure, ex: well contaminated after rainfall
Propagated spread: person to person (direct or indirect) contact, no single source of infection each individual becomes a source
Reservoirs and Carriers
Reservoir: site where pathogens reside. Ex: soil and water, blue jay, monkey (can be living or nonliving and are asymptomatic)
-
Passive: NOT infected , Active: IS infected
-
Modes of Transmission
-
Indirect Contact
Transmission via fomites: nonliving objects. Ex: doorknobs, towels, syringes
Vehicle Transmission
Food, water, and air act as vehicles of transmission
-
Vector Transmission
Mechanical vector: carries pathogens on body, not as an infection
Biological vector: becomes infected and transmits it. Ex: mosquitos, ticks, fleas, chiggers