Table 1.

Serologic Testing for Various Autoimmune and Infectious Etiologies

Serologic Test	Result	Reference Range
Antinuclear antibody screen	Negative	Negative
ANCA	< 1:20	< 1:20
Myeloperoxidase Ab IgG	0	0-19 AU/mL
Glomerular basement membrane IgG	0	0-19 AU/mL
Lyme IgG Ab	< 0.04	< 0.20
Lyme IgM Ab	0.00	< 0.12
RMSF IgG	< 1:64	< 1:64
RMSF IgM	< 1:64	< 1:64
Babesia IgG	< 1:16	< 1:16
Babesia IgM	< 1:20	< 1:20
Anaplasma phagocytophilum IgG	< 1:80	< 1:80
Aphagocytophilum IgM	< 1:16	< 1:16
HIV Ab/Ag screen	Nonreactive	Nonreactive
Hepatitis A IgM	Negative	Negative
Hepatitis B surface antigen	Negative	Negative
Hepatitis B surface Ab	165.92	< 7.99 mIU/mL
Hepatitis B core Ab	Negative	Negative
Hepatitis C Ab	Negative	Negative
Hepatitis E Ab IgG	Negative	Negative

Ab = antibody; ANCA = antineutrophil cytoplasmic antibodies; RMSF = Rocky Mountain spotted fever.