Module 2 Key Terms & Concepts

Key Terms

Define the following terms.

Active carrier

Active primary prevention

Agent

Airborne transmission

Analytic epidemiology

Biological transmission

Carrier

Case

Case definition

Case severity

Cause

Chain of infection

Common-source epidemic

Convalescent carrier

Descriptive epidemiology

Direct transmission

Effectiveness

Efficacy

Endemic

Environment

Epidemic

Epidemiology

Fomite

Healthy carrier

Host

Incubatory carrier

Index case

Indirect transmission

Intermittent carrier

Mechanical transmission

Mixed epidemic

Modes of disease transmission

Pandemic

Passive carrier

Passive primary prevention

Pathogen

Portal of entry

Portal of exit

Primary case

Primary prevention

Propagated epidemic

Rehabilitation

Reservoir

Risk factor

Secondary case

Secondary prevention

Suspect case

Tertiary prevention

Time

Vector

Vector-borne transmission

Vehicle

Vehicle-borne transmission

Zoonosis