Epidemiology
Extent of a Disease
Carriers
Modes of Transmission
Cases
100

Field of science that studies health problems within populations 

What is Epidemiology?

100

The occurrence of cases of an illness, specific health-related behavior, or other health-related events clearly in excess of normal expectancy in a community or region.

What is epidemic?

100

Individual who has been exposed to and harbors a disease-causing organism (pathogen) and who has done so for some time, even though the person may have recovered from the disease.

What is active carrier?

100

The direct and immediate transfer of an infectious agent from one person to another.

What is direct transmission?

100

A person in a population who has been identified as having a particular disease, disorder, injury, or condition.

What is case?

200

Involves findings and quantifying associations, testing hypotheses, and identifying causes of health-related states or events

What is analytical epidemiology?

200

An epidemic affecting or attacking the population of an extensive region, country, or continent

What is pandemic?

200

Individual who has been exposed to and harbors a pathogen but has not become ill or shown any of the symptoms of the disease. This could be referred to as a subclinical case.

What is healthy or passive carrier?

200

Occurs when an agent is transferred or carried by some intermediate item, organism, means, or process to a susceptible host, resulting in disease

What is indirect transmission?

200

The first disease case brought to the attention of the epidemiologist

What is index case?

300

Involves characterization of the distribution of health-related states or events.

What is descriptive epidemiology?

300

This refers to the ongoing, usual, or constant presence of a dis-ease in a community or among a group of people; a disease is said to be endemic when it continually prevails in a region.

What is endemic?

300

Individual who harbors a pathogen and who, although in the recovery phase of the course of the disease, is still infectious.

What is convalescent carrier?

300

When an arthropod (e.g., mosquito, flea, tick, lice) conveys the infection agent.


What is vector-borne transmission?

300

In an epidemic, the first disease case in the population

What is primary case?

400

Arise from a specific source and tend to result in cases occurring more rapidly during the initial phase

What is common-source?

400

Arise from infections transmitted from one infected person to another.

What is propagated?

400

Individual who has been exposed to and harbors a pathogen, is in the beginning stages of the disease, is displaying symptoms, and has the ability to transmit the disease.

What is incubatory carrier?

400

Related to fomites, food, or water that acts as a conveyance.

What is vehicle-borne transmission?

400

Those persons who become infected and ill after a disease has been introduced into a population and who become infected from contact with the primary case

What is secondary case?
500

A model of disease causation that helps us understand the interrelated nature of factors that contribute to disease

What is epidemiology triangle?

500

This occurs when victims of a common-source epidemic have person-to-person contact with others and spread the dis-ease, resulting in a propagated outbreak.

What is mixed epidemic?

500

Individual who has been exposed to and harbors a pathogen and who can spread the disease in different places or at different intervals.

What is intermittent carrier?

500

When the pathogen undergoes changes as part of its life cycle while within the host/vector and before being transmitted to the new host

What is biological transmission?

500

An individual (or a group of individuals) who has all of the signs and symptoms of a disease or condition yet has not been diagnosed as having the disease or has the cause of the symptoms connected to a suspected pathogen

What is suspect case?

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