The nurse administers a tuberculin screening test to a patient who has no known risk factors for tuberculosis (TB).When the test site is read 48 hours later,which result is considered positive?
A)Induration of 2 mm or more
B)Induration of 5 mm or more
C)Induration of 10 mm or more
D)Induration of 15 mm or more

Question

Quizplus · Accepted Answer

A raised,reddened,or hard zone around the test site indicates a positive tuberculin skin test.An induration of 15 mm or more indicates a positive reaction in patients with no known risk factors for tuberculosis (TB).An induration that measures 5 mm or more in diameter indicates a positive TB reaction in patients who are human immunodeficiency virus (HIV)positive,have fibrotic changes on chest radiograph consistent with previous TB infection,have had organ transplants,or are immunosuppressed.An induration of 10 mm or more indicates a positive TB reaction in patients who are recent immigrants;injection drug users;residents and employees in high-risk settings;patients with certain chronic illnesses;children younger than 4 years of age;and infants,children,and adolescents exposed to high-risk adults.

The Nurse Administers a Tuberculin Screening Test to a Patient