What is a subclinical case?

What is a subclinical case?

• A. A situation where the host experiences mild symptoms of an infection.
• B. A case with severe symptoms.
• C. A case with no symptoms at all.
• D. A case detected only by laboratory tests.

Answer: (A)

Subclinical infection means the infection is present but does not cause the full, obvious clinical illness; symptoms, if present, are mild or non-specific. This question highlights that idea by pointing to a situation where only mild symptoms are experienced, rather than the severe signs of a fully developed disease. Severe symptoms would indicate overt clinical disease, and no symptoms would be asymptomatic. While some subclinical cases may be detected only by lab tests, the defining feature here is the presence of mild symptoms rather than no symptoms or severe symptoms.

Subclinical infection means the infection is present but does not cause the full, obvious clinical illness; symptoms, if present, are mild or non-specific. This question highlights that idea by pointing to a situation where only mild symptoms are experienced, rather than the severe signs of a fully developed disease. Severe symptoms would indicate overt clinical disease, and no symptoms would be asymptomatic. While some subclinical cases may be detected only by lab tests, the defining feature here is the presence of mild symptoms rather than no symptoms or severe symptoms.