principles of disease Flashcards
evil spirits
Supernatural Theory
yellow & black bile, blood & phlegm
Humors theory
invisible seeds
Contagion theory
foul/ noxious gases
Miasmatic theory
demonstrated the presence of bacteria in air
Louis Pasteur
Germ theory
Louis Pasteur
One to one relationship between the causal Agent & Disease
Germ theory
Disease is caused by multitude of factors / determinants not just one
Multifactorial causation
Multifactorial causation
Pettenkoffer
Epidemiological Triad
Leavel and Clark
represents the interaction / interrelationship between the Host , Agent and the Environment in disease causation
Epidemiological Triad
Multiplicity of interactions between the Host , Agent and the Environment. i.e multiple factors in disease causation.
Web of causation
represents / visualizes disease causation in form of a wheel , Central hub – genetic component,
Peripheral part- environmental component
Wheel of causation
Categorizesthemajor (9)riskfactors
-Biological & Behavioral factors -Environmental factors
-Immunological factors
-Nutritional factors
-Genetic factors
-Services, Social factors & Spiritual factors
BEINGS model
Way in which disease progresses over time from the earliest pre-pathogenesis stage to its termination as recovery, disability or death in the absence of intervention.
Natural history of a disease