Intro to Epidemiology Part 2 Flashcards
(13 cards)
The epidemiological triad of disease causation refers to:
Agent, host, environment
The stage of the chain of infection when a person who is sick from tuberculosis coughs into the air…
Portal of exit
A community that usually experiences between 10 and 15 cases of a particular disease per week find that during the week of Nov. 3-9th, there were 9 cases of disease.
This disease in ENDEMIC
The latency period of disease is when…
The patient has no symptoms.
The expression used to categorize how severe a disease is…
virulence
A propagated epidemic is usually the result of what type of exposure?
Person to Person
What is incubation period?
Time of exposure to onset of disease symptoms.
What is the chain of infection?
- Reservior
- Portal of Exit
- Mode of Transmission
- Portal of Entry
- Host
Epidemic Disease Occurences
- Sporadic- infrequent or irregular
- Endemic- constant presence and/or usual prevalence
- Hyper-endemic=persistent high levels
- Epidemic=often sudden increase in numbers
- Pandemic=an epidemic that has spread over several countries or continents
What is Common Source Outbreak?
group of persons all exposed from same source
What is Point Source Outbreak?
Everyone exposed within one incubation period from same source
Continuous source outbreak
may have been exposed over a period of days, weeks, or longer
range of exposure & incubation flatten and widen
Propagated Outbreaks
transmission from person to person usually by direct contact
