Mayo Test Catalog, (Sorted By Test Name) - Mayo Medical ...

EHRCP
81480
EHRC
81478
Reference Values:
Class IgE kU/L Interpretation
0 Negative
1 0.35-0.69 Equivocal
2 0.70-3.49 Positive
3 3.50-17.4 Positive
4 17.5-49.9 Strongly positive
5 50.0-99.9 Strongly positive
6 > or =100 Strongly positive Reference values
apply to all ages.
Clinical References: Homburger HA: Allergic diseases. In Clinical Diagnosis and Management
by Laboratory Methods. 21st edition. Edited by RA McPherson, MR Pincus. New York, WB Saunders
Company, 2007, Chapter 53, Part VI, pp 961-971
Ehrlichia Antibody Panel, Serum
Clinical Information: See individual unit codes
Useful For: As an adjunct in the diagnosis of ehrlichiosis In seroepidemiological surveys of the
prevalence of the infection in certain populations
Interpretation: Serology for IgG may be negative during the acute phase of infection but a
diagnostic titer usually appears by the third week after onset. A positive immunofluorescence assay
(IFA) (titer > or =1:64) suggests current or previous infection. In general, the higher the titer, the more
likely the patient has an active infection. Four-fold rises in titer also indicate active infection. Previous
episodes of ehrlichiosis may produce a positive serology although antibody levels decline significantly
during the year following infection.
Reference Values: