1 The most common symptom of pinworms is an itchy rectal area. Symptoms are worse at night when the female worms are most active and crawl out of the anus to deposit their eggs.  Although pinworm infections can be annoying, they rarely cause serious health problems and are usually not dangerous.
To determine the suitability of an individual for a particular job, some employers may require a pre-employment physical examination. Urine drug tests, hair drug or alcohol testing, saliva drug screen, and sweat drug screen are among a few of the types of drug tests available.
They also identify the five substances tested for in Federal drug-testing programs and require the use of drug labs certified by SAMHSA. The most common method of drug testing, urinalysis, can be done at the workplace (at a health unit, for example), a doctorâs office or any other site selected by the employer. An employee or applicant provides a sample to be tested.