Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
An active carrier is an individual who harbors a pathogen and can transmit it to others, often without showing symptoms. They play a crucial role in the spread of infectious diseases.
5 Must Know Facts For Your Next Test
Active carriers can transmit pathogens even if they are asymptomatic.
They are critical in the epidemiology of both chronic and acute diseases.
Active carriers often contribute to outbreaks because their lack of symptoms can lead to undetected transmission.
Healthcare settings closely monitor for active carriers to prevent nosocomial infections.
Identification and management of active carriers are essential for effective disease control strategies.
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Related terms
Asymptomatic Carrier: A person who carries and spreads a disease without showing any symptoms.
Chronic Carrier: An individual who continues to harbor a pathogen over a long period, often leading to persistent transmission.
Nosocomial Infection: Infections acquired in hospitals or healthcare facilities, often involving pathogens transmitted by active carriers.