EPIDEMOLOGY AND PUBLIC HEALTH

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INTRODUCTION

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Epidemiology and Public HealthIntroduction, Part II : 

Epidemiology and Public HealthIntroduction, Part II

Changing Patterns of Community Health : 

Changing Patterns of Community Health Health patterns in constant state of flux Infectious versus chronic diseases Population and age-related

Chain of Infection : 

Chain of Infection Etiological agent Source/Reservoir Portal of exit Mode of transmission Portal of entry Susceptible host

Modes of Transmission : 

Modes of Transmission Contact transmission Vehicle transmission Vector transmission

Classes of Epidemics : 

Classes of Epidemics Common source (vs. sporadic) Point source Intermittent Continuous Propagated Your Assignment: Define these terms & identify which apply to the following three graphs

Disease Investigation : 

Disease Investigation Establish diagnosis Identify specific agent Describe according to person, place and time Identify source of agent Identify mode of transmission Identify susceptible populations

Epidemiology and Clinical Practice : 

Epidemiology and Clinical Practice Clinical practice dependent on epidemiology Epidemiology defines natural history of disease Even descriptive information is useful

The Epidemiologic Approach : 

The Epidemiologic Approach Multistep process First - determine association Then prove causation Not all associations are causal Examine validity, false assumptions- e.g. - fluoride in water

Analytic Studies : 

Analytic Studies Type of study Design Analysis of data

Epidemiology and Prevention : 

Epidemiology and Prevention Identify high risk populations Modify risks Prevent exposures

Levels of Prevention : 

Levels of Prevention Primary Secondary Tertiary

Levels of Prevention (cont’d) : 

Levels of Prevention (cont’d) Primary Involves halting any occurrence of a disease or disorder before it happens

Levels of Prevention (cont’d) : 

Levels of Prevention (cont’d) Secondary Health screening and detection activities

Levels of Prevention (cont’d) : 

Levels of Prevention (cont’d) Tertiary Retard or block the progression of condition

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