]> 2026-07-31T07:52:03+00:00 WBR0452 0 en CD4 count CD4 count is used to follow-up patients with HIV. HIV testing is not required prior to the initiation of anti-TNF therapy. HBsAg HBsAg is diagnostic of hepatitis B virus (HBV). HBV screening is not recommended prior to the initiation of anti-TNF therapy. HCV RNA HCV RNA is diagnostic of hepatitis C virus (HCV). HCV screening is not recommended prior to the initiation of anti-TNF therapy. Monospot test Monospot test is a diagnostic test for active Epstein-Barr virus (EBV) infection. Monospot test, however, is not specific and can be positive in other infections and hematological malignancies. EBV screening is not recommended prior to the initiation of anti-TNF therapy. PPD test PPD test test is diagnostic of latent tuberculosis. Screening for tuberculosis is recommended prior to the initiation of anti-TNF therapy. Pharmacology A 24-year-old man presents to the physician’s office with watery diarrhea of several weeks duration. Following appropriate work-up, the patient undergoes intestinal biopsy that reveals transmural inflammatory infiltration with granulomatous skip lesions. The patient is then diagnosed with Crohn’s disease. The physician prescribes infliximab and informs the patient of the benefits and risks of infliximab therapy. Which of the following tests must be performed before the initiation of infliximab? E Gastrointestinal 2020-10-28T00:37:14Z 2459150.5258565 WBR0452