Epidemiology

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Epidemiology

• Prevalence -
• Incidence -
• Endemic
• Epidemic
• Pandemic

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Carriers

• Mortality
• Morbidity
• Disease Reservoirs
• Acute Carriers
• Incubation Period
• Chronic Carriers

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Transmission

• Host-to-Host
• Zoonosis
• Vector
• Fomites
• Food and Water
• Common-Source Epidemic

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John Snow
Stopped Cholera Epidemic in London (1855) by
Removing Broad Street Pump Handle
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Host Parasite Coevolution

• Australian feral rabbits
• 1950 Myxoma virus
• 95 mortality
• 1980 previrus levels
• Gonorrhea
• Scarlet fever

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Herd Immunity Nosocomial Infections
Opportunistic pathogens Mycosis
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Public Health

• Control Reservoir
• Prevent Transmission
• Immunization
• Quarantine
• Surveillance
• CDC Center for Disease Control and Prevention
• Pathogen Eradication

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Global Health

• Travel
• Developing Countries
• Reemerging Diseases
• Emerging Diseases

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Biological Warfare

• Easy to produce and deliver
• - aerosol
• Safe
• Incapacitate or Kill
• 1972 Biological Toxin Weapon Convention

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Biological Weapons
Any Pathogen? Smallpox Eradicated? Russia and
United States Delivery Aerosol Drinking
water Food Protection?
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Anthrax

• Bacillus anthracis
• Common in soil
• Domestic animals
• Pulmonary anthrax
• 8000 50000 spores
• Weaponized
• 8 day incubation
• Ciprofloxacin - Cipro

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Epidemiology Word List
Prevalence Incidence Endemic Epidemic Pandemic Car
rier Mortality Morbidity
Disease Reservoirs Acute Carrier Incubation
Period Chronic Carrier Typhoid Mary Transmission H
ost-to-Host Vector
Fomites Food and Water Common-Source
Epidemic John Snow - Cholera Herd
immunity Nosocomial Infections
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Epidemiology Word List 2
Surveillance Pathogen Eradication Global
Health Travel Developing Countries Reemerging
Diseases Emerging Disease
Opportunistic pathogens Mycosis Public
Health Control Reservoir Prevent Transmission
Immunization Quarantine