Types of Carriers
Modes of Disease Transmission
Case Concepts in Epidemiology
Disease Transmission Concepts
Levels of Prevention
100

Definition of 'Healthy Carrier'.

What is an individual who has been exposed to and harbors a pathogen but has not become ill or shown any of the symptoms of the disease?

100
Definition of 'Airborne Transmission'.

What is droplets or dust particles carry the pathogen to the host?

100

Definition of 'Case".

What is a person in a population who has been identified as having a particular disease, disorder, injury, or condition?
100

Definition of 'Vehicle'.

What is a nonliving intermediary that conveys the infectious agent from its reservoir to a susceptible host?

100

Definition of 'Primary Prevention'.

What is preventing a disease or disorder before it happens?

200

Definition of 'Active Carrier'.

What is an individual who has been exposed to and harbors a disease-causing organism and who has done so for some time, even though the person may have recovered from the disease?

200

Definition of 'Vehicle-borne Transmission'.

What is an inanimate object that conveys an infectious agent?

200

Definition of 'Primary Case'.

What is the first disease case in the population?

200

Definition of 'Carrier'.

What is contains, spreads, or harbors an infectious organism?

200

Definition of 'Secondary Prevention'.

What is aimed at the health screening and detection activities used to identify diseases?

300

Definition of 'Intermittent Carrier'.

What is an individual who has been exposed to and harbors a pathogen and who can spread the disease in different places or at different intervals?

300

Definition of 'Direct Transmission'.

What is the uninterrupted and immediate transfer of an infectious agent from one person to another?

300

Definition of 'Suspect Case'.

What is an individual who has all the signs and symptoms of a disease or condition but has not been diagnosed as having the disease?

300

Definition of 'Zoonosis'.

What is an infectious organism in vertebrate animals that can be transmitted to humans through direct contact, a fomite, or a vector?

300

Definition of 'Active Primary Prevention'?

What is requires behavior change in the individual?

400

Definition of 'Convalescent Carrier'.

What is an individual who harbors a pathogen and who, although in the recovery phase of the course of the disease, is still infectious?

400

Definition of 'Vector-borne Transmission'.

What is when an arthropod conveys the infectious agent?

400

Definition of 'Index Case'.

What is the first disease case brought to the attention of the epidemiologist?

400

Definition of 'Vector'.

What is an invertebrate animal that transmits infection by conveying the infectious agent from one host to another?

400

Definition of 'Tertiary Prevention'.

What is consists of limiting any disability by providing rehabilitation when a disease, injury, or disorder has already occurred and caused damage?

500

Definition of 'Incubatory Carrier'.

What is an 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?

500

Definition of 'Biological Transmission'.

What is when the pathogen undergoes changes as part of its life cycle while within the host and before being transmitted to the new host?

500

Definition of 'Case Definition'.

What is ensures that cases are consistently diagnosed, regardless of where or when they were identified and who diagnosed the case?

500

Definition of 'Reservoir'.

What is the habitat in or on which an infectious agent lives, grows, and multiples, and on which it depends for its survival in nature?

500

Definition of 'Passive Primary Prevention'.

What is does not require behavior change on the part of the individual?

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