Clinical features that may bring a person in for evaluation:
(1) perianal pruritis
(2) anal rubbing or scratching, with risk of scarring
(3) behavioral issues (squirming, irritability, insomnia, nervousness)
(4) exposure at home, school or institution to someone diagnosed with pinworms
Other clinical findings:
(1) colitis in immunosuppressed
(2) vulvitis and/or vaginal discharge
Laboratory testing typically involves some form of adhesive coated collector (adhesive tape, coated paddle, other) applied to perianal skin after awakening from sleep and prior to bathing. An infection cannot be excluded unless multiple (4-6) separate examinations are negative.
Other laboratory findings:
(1) variable eosinophilia
(2) positive ova and parasite examination of stool
