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60 Cards in this Set

  • Front
  • Back
What is epidemiology?
Study of the DISTRIBUTION AND DETERMINANTS of health-related states or events in human populations, and the application of this study to prevent and control health problems
-Frequency and pattern
Distribution
Study of frequency and pattern of health events in the population
Determinants
Search for causes and other factors of health-realted states or events
Analytic Studies
How and why
What should be considered when evaluating a prevention or control program?
1. efficacy
2. effectiveness
Efficacy
The ability of a program to produce a desired effect among those who participate in the program compared with those who do not
Effectiveness
The ability of a program to produce benefits among those who are offered the program
Epidemic
Health-related state or event in a defined population above the expected over a given period of time
Endemic
Persistent, usual, expected health-related state or event in a defined population over a given period of time
-Annually
Pandemic
Epidemic affecting a large number of people, many countries, continents, or regions
Ex: AIDS
Outbreak
Seperated epidemic from outbreak, epidemic more large scale
-"Cluster"
The types of disease transmissions
1. Direct
2. Fomite-borne
3. Vehicle-borne
4. Vector-borne
Direct
Person-to-person contact
Ex: STDs
Fomite-borne
By nonliving objects
Ex: Hepatitis A from utensils
Vehicle-borne
A nonliving intermediary such as a fomite, food, or water
Ex: HIV/AIDS through needle
Vector-borne
An invertebrate annimal
Ex: Malaria from ticks
Epidemiology Triangle
Four factors that must come together for an epidemic outbreak:
1. Agent
2. Host
3. Environment
4. Time
-Time is in the middle
-Other three around
Agent
Disease causing organism
Host
Will contract disease, can transmit it
Environment
Surroundings or conditions that allow disease to survive
Time
How long disease might be effective, life expectancy of the agent
The Chain of Infection
Agent > Reservoir > Mode of Transmission lportal of entryl > Host
Reservoir
Environment (Humans can be reservoir and host)
Mode of transmission
To a suspectible host either with direct or indirect transmission
Fomites
Objects such as clothing, towels, and utensils that may harbor a disease agent and are capable of transmitting it
Vector
An invertebrate animal capable of transmitting an infectious agent among vertebrates
Active Primary Prevention
Requires behavior change on part o fsubject
-Wearing protective devises
-Health promotion
-Lifestyle changes
-Community health ed
-Ensuring healthy conditions at home, school, and workplace
Passive Primary Prevention
Does not require behavior change
-Vitamin fortified foods
-Fluoridation of public water supplies
Secondary Prevention
-Occurs to reduce the progress of disease
-The disease already exists in the person
Ex: Cancer screening
Tertiary Prevention
-To reduce the limitation of disability from disease
-The disease has already occured
Ex: physical therapy for stroke victims, halfway hosues for recovery alcoholics, fitness programs for heart attack patients
Identified various modes of transmission and father of epidemiology
John Snow
Prepared a report that set froth the importance of establishing state and local boards of health
Lemuel shattuck
Provided classifications of morbidity statistics to improve the value of morbidity information
Edgar Sydenstricker
Observed in the 17th century that certain jobs carried a high risk for disease
Bernardino Ramazzini
Eradicated beriberi from the Japanese navy
T.K. Takaki
Introduced the words "epidemic" and "endemic"
Hippocrates
Advanced useful treatments and remedies including exercise, fresh air, and a healthy diet, which other physicians rejected at the time
Thomas Sydenham
Through an experimental study, showed that lemons and oranges were protective against scurvy
James Lind
Identified as the first person in the US to be a healthy carrier of typhoid fever
Mary Mallon
Invented a vaccincation for smallpox
Edward Jenner
The father of modern epidemiology
Wade Hampton Frost
Used data as a tool for improving city and military hospitals
Florence Nightingale
Conducted the first cohort study investigating the association between smoking and lung cancer
Doll and Hill
Promoted the idea that some diseases, especially chronic diseases, can have a multifactorial etiology, also vital statistic system
William Farr
Observed that milkmaids did not get smallpox, but did get cowpox
Benjamin Jesty
Developed a vaccine for anthrax
Louis Pasteur
Pioneered the use of cohort and case-control studies, genes can influence cancer risk
Janet Lane-Claypon
A pioneer in the field of toxicology, occupational disease investigation
Alice Hamilton
Credited as producing the first life table, Bills of Mortality
John Graunt
Used photograhy to take the first pictures of microbes in order to show the world that microrganisms in fact existed and that they caused many diseases
Robert Koch
Identified a healthy carrier oh typhus
Geroge Soper
Discovered that the incidence of puerperal fever could be drastically cut by the use of hand washing standards in obstertrical clinics
Ignaz Semmelweis
Virulence
The disease-evoking power of a pathogen (intensity of a disease)
What are two general classifications of disease?
1. Acute
2. Chronic
Acute
Disorder with sudden onset, relatively severe, and short duration of symptoms
Chronic
less severe but of long and continuous duration, lasting over long time periods, if not a lifetime
What are the major stages in the disease process?
1. Stage of susceptibility - Precedes taht of a disease process (primary)
2. Stage of pre-symptomatic disease - Disease process started but not signs (secondary)
a. Incubation period - Acute diseases
b. Latency period - Chronic diseases
3. Stage of clinical disease - Signs and symptoms start (tertiary)
4. Stage of recovery, disability, or death (tertiary)
Active Immunity
Where the body produces its own antibodies. Thsi can occur through a vaccine or in response to having a specific disease pathogen invade the body
Passive Immunity
Acquired thorugh transplacental transfer of a mother's immunity to diseases to the unborn child
What is herd immunity?
-The resistance a population has to the invasion and spread of an infectious disease
-Based on the notion that if a population is mistly protected from a disease by immunizations, then the chance of a majority epidemic occuring is highly limited