Exposure

Definition

Exposure is the process by which a host comes into contact with a pathogen. It is the initial step in the chain of infection and can occur through various routes such as inhalation, ingestion, or direct contact.

5 Must Know Facts For Your Next Test

1. Exposure does not always lead to infection; it depends on the pathogen's virulence and the host's immune response.
2. Common routes of exposure include respiratory droplets, contaminated food or water, and skin contact.
3. The infectious dose required for disease varies among different pathogens.
4. Preventative measures like vaccination and hygiene practices can reduce exposure risk.
5. Understanding exposure pathways is crucial for controlling the spread of infectious diseases.

Review Questions

• What are common routes through which exposure to pathogens can occur?
• How does exposure differ from infection?
• Why is understanding exposure important in preventing disease?

Related terms

Infection: The invasion and multiplication of pathogens in a host organism, leading to illness.

Virulence:

The degree of pathogenicity or ability of a microorganism to cause disease.

Host: An organism that harbors a pathogen and provides sustenance for its growth and reproduction.