Asymptomatic infection

Definition

An asymptomatic infection occurs when a person is infected by a virus but does not exhibit any noticeable symptoms. Despite the absence of symptoms, the individual can still spread the virus to others.

5 Must Know Facts For Your Next Test

1. Asymptomatic individuals can be carriers and transmitters of viral infections.
2. Viral load in asymptomatic infections may be similar to or lower than those with symptomatic infections.
3. Detection of asymptomatic infections often relies on laboratory tests such as PCR or antigen testing.
4. Asymptomatic infections can complicate efforts to control outbreaks because they are harder to detect.
5. Certain viruses, like SARS-CoV-2, are known for having a high rate of asymptomatic cases.

Review Questions

• How can asymptomatic individuals contribute to the spread of viruses?
• What methods are used to detect asymptomatic viral infections?
• Why do asymptomatic infections present challenges in controlling viral outbreaks?

Related terms

Symptomatic Infection: An infection where the host exhibits clear signs and symptoms of illness.

Viral Load: The quantity of virus present in an infected individual's body, often measured in blood or other fluids.

PCR Testing: A laboratory technique used to amplify and detect DNA sequences, widely used for diagnosing viral infections.