Infectious Disease

Lactate Dehydrogenase (LD)

Test Code: 593

CPT Code(s): 83615

Methodology: Spectrophotometry (SP)

Clinical Significance: Elevations in serum lactate dehydrogenase occur from myocardial infarction, liver disease, pernicious and megaloblastic anemia, pulmonary emboli, malignancies, and muscular dystrophy. Since lactic dehydrogenase is present in many body tissues, it's diagnosis usefulness is limited. Tissue specificity may be enhanced by isoenzyme analysis.

Heterophile, Mono Screen

Test Code: 654

CPT Code(s): 86308

Methodology: Agglutination

Clinical Significance: Heterophile antibodies, in patients with infectious mononucleosis, may be present as early as the fourth day of illness, and by the twenty-first day of illness, 90% of patients will exhibit a positive test. The Epstein-Barr virus causes infectious mononucleosis.

Alternative Name(s): Infectious Mononucleosis, Mono Screen