Table 2 Symptom-specific laboratory studies demonstrating iron deficiency, positive human immunodeficiency virus antibody, and positive heterophile antibody

Thyroid-stimulating hormone

0.400–5.000 μIU/mL

1.085

C-reactive protein

< 0.4 mg/dL

< 0.4

Erythrocyte sedimentation rate

≤ 37 mm/hour

2

Antinuclear antibody

< 1:80

< 1:80

Hepatitis C antibody screen

Negative

Negative

Ferritin

22.0–322.0 ng/mL

10.2

Human immunodeficiency virus screening

Negative

Positive

Syphilis treponemal antibody

Negative

Negative

Heterophile antibody

Negative

Positive