Epidemiology of Disease

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Common Source Epidemic Curve 15 12 Number of cases 9 6 3 0 5 10 15 20 Day
Temporal Patterns of Disease Propagated epidemics Classic infectious disease outbreak Occurs when an agent is transmitted through the population from host to host (typically infectious conditions) Nature of epidemic depends on • Characteristics of agent (virulence) and host (susceptibility) • Contact rate (likelihood of contact occurring between infectious and susceptible hosts) • Population density Examples: • Influenza spread in people (plane trips, day care facilities) • Contagious mastitis in dairy cattle
Page 1 and 2: May 1, 2007 POPH 5160: Infectious D
Page 3 and 4: Overview of this Session… Descri
Page 5 and 6: Epidemiology The study of the caus
Page 7 and 8: What’s the Relevance to a Veterin
Page 9 and 10: So…if We Can Manage Risk, We Can
Page 11 and 12: Infectious Disease Transmission A c
Page 13: Dynamics of Intramammary Infections
Page 16 and 17: Temporal Patterns of Disease Patte
Page 18 and 19: Temporal patterns of disease Epide
Page 22 and 23: Propagated Epidemic Curve 15 12 Num
Page 24 and 25: Factors Influencing Disease Transmi
Page 34 and 35: Epidemiological Triads and the “I
Page 36 and 37: Four Common but Serious Mistakes Du
Page 38 and 39: Four Common but Serious Mistakes Du
Page 40 and 41: Hazards Analysis and Critical Contr
Page 42 and 43: Conclusions Diseases normally do n

Epidemiology of Disease

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