Q Fever with Unusual Exposure History: A Classic Presentation of a Commonly Misdiagnosed Disease
Table 1
Case-patient laboratory test results, Montana, 2011.
Laboratory test
Result
White blood cell count (g/L)
4.1
Platelet count (g/L)
115
Blood urea nitrogen (mg/dL)
23
Creatinine (mg/dL)
1.7
Aspartate aminotransferase (IU/L)
132
Alanine aminotransferase (IU/L)
193
Alkaline phosphatase (IU/L)
106
Coxiella burnetii antibody titers† by specimen
Acute‡
IgG*/IgM phase I
<1 : 16/not done
IgG/IgM phase II
<1 : 16/<1 : 16
Convalescent§
IgG/IgM phase I
≥1 : 256/1 : 64
IgG/IgM phase II
≥1 : 256/≥1 : 256
SFGR antibody titers† by specimen
Acute‡
IgG
1 : 64
IgM
<1 : 64
Convalescent§
IgG
1 : 128
IgM
<1 : 64
Borrelia burgdorferi antibody¶ (IgG and/or IgM) by specimen
Acute‡
Negative
Convalescent§
Negative
West Nile virus antibody¶
IgG
Negative
IgM
Negative
*IgG: immunoglobulin G; IgM: immunoglobulin M; SFGR: spotted fever group rickettsiae.
†Testing performed using indirect immunofluorescence assay.
‡Acute specimen collected on June 29, 2011.
§Convalescent specimen collected on July 12, 2011.
¶Testing performed using enzyme-linked immunosorbent assay (ELISA); therefore, no titers reported.