Which of the following is an example of a point-of-care test for infectious diseases?

Rapid antigen tests for COVID-19 are a prime example of a point-of-care test (POCT) for infectious diseases because they are designed to provide quick results at or near the site of patient care. These tests allow for the immediate detection of antigens associated with the virus, enabling healthcare providers to make quick decisions regarding patient management and public health measures.

The key characteristics of point-of-care testing include portability, ease of use, and the ability to deliver results within a short timeframe, often in less than an hour. Rapid antigen tests fit these criteria perfectly. They can be performed in various settings, such as clinics, emergency rooms, or even at home, enhancing access to testing.

In contrast, blood pressure monitors, X-ray imaging, and CT scans are not classified as point-of-care tests for infectious diseases. Blood pressure monitors are used to assess cardiovascular health but do not diagnose infections. X-rays and CT scans are diagnostic imaging techniques that typically require specialized equipment and trained personnel, and the results may not be available immediately, making them unsuitable for rapid decision-making in the context of infectious diseases.