What type of test is usually performed to identify Enterobius vermicularis infection?

To identify an Enterobius vermicularis infection, commonly known as pinworm infection, the Scotch tape test is the most effective method. This test involves applying a piece of clear tape to the perianal region, usually in the morning before the individual bathed or used the restroom. The tape is then examined under a microscope for the presence of pinworm eggs.

This method is particularly effective because Enterobius vermicularis females lay their eggs around the anal area, especially at night, making the eggs accessible for collection with the tape. Because pinworms are not often detected in fecal specimens—whereas other parasites might be—the Scotch tape test provides a reliable means of collecting and identifying the eggs specifically associated with this type of infection.

Other testing methods like blood tests, fecal smears, or urine analyses are not appropriate for diagnosing Enterobius vermicularis. Blood tests are generally not used for diagnosing helminth infections like pinworms, and fecal smears, while useful for some gastrointestinal parasites, are ineffective for pinworms. Urine analysis does not provide any relevant information concerning a pinworm infection. Thus, the Scotch tape test stands out as the defining method for confirming the presence of Enterobius vermicularis eggs