Which methods are used to detect pinworm infection?

• A. Anal tape test and postmortem cecal exam
• B. ELISA and PCR
• C. HAI and MFI
• D. All of the above

Answer: (A)

Pinworm detection relies on finding the eggs where the worms lay them and, when possible, directly inspecting the gut for the adult worms. The anal tape test is the standard live-detection method: press a piece of clear adhesive tape to the perianal area first thing in the morning, then examine the collected material under a microscope for pinworm eggs. This method is simple, rapid, and specifically targets the site where eggs are deposited.

If the animal has been necropsied or if live testing isn’t feasible, examining the cecum and surrounding intestinal tissue during dissection can reveal adult pinworms or their eggs, providing a direct confirmation of infection.

ELISA and PCR can be used for various parasites in some contexts, but they are not routine, validated methods for pinworms in typical lab animal practice. The immunoassays listed are designed for different pathogens and do not represent standard detection methods for pinworms.

HAI and MFI likewise aren’t standard tools for pinworm detection. So the combination of an anal tape test and postmortem cecal examination best fits the common practice for detecting pinworm infection.