Screening and testing is done to identify adult worms or eggs. Pinworm ova are flat on one side and this aides in their identification. Often times eggs are visible on transparent tape which is placed over the perianal skin after awakening. This "tape test" alone detects nearly half of all infections. To increase the chances of finding a pinworm the tape test should be repeated on 3 consecutive mornings. To perform this test a clear piece of tape is placed firmly over the anus. The eggs then stick to the tape which can be observed under a microscope. After preparation with lactophenol cotton blue eggs will stain a deep blue aiding in identification. In addition, the tape test should be performed immediately after one awakes and prior to cleansing or toileting for the most accurate results.
Stool or urine samples are not an effective way for screening or diagnosing pinworms.
Diagnosis is usually clinical and based on visualizing worms near the perianal skin or on linens. Adult worms can be seen on bedding 2-3 hours after a child falls asleep. Perianal itching is highly indicative of pinworms.
Taking samples from under the nail beds may also aide in diagnosis.
Lab results will remain normal except is severe cases with advanced disease, in this case eosinophils may be elevated.
Stool or urine samples are not an effective way for screening or diagnosing pinworms.
Diagnosis is usually clinical and based on visualizing worms near the perianal skin or on linens. Adult worms can be seen on bedding 2-3 hours after a child falls asleep. Perianal itching is highly indicative of pinworms.
Taking samples from under the nail beds may also aide in diagnosis.
Lab results will remain normal except is severe cases with advanced disease, in this case eosinophils may be elevated.