Giardia Antibody, IFA
Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
REFERENCE RANGE: <1:16
<1:16 Antibody Not Detected
1:16 Equivocal; submission of a second specimen (collected 3-4 weeks after initial specimen) suggested if clinically warranted
> or = 1:32 Antibody Detected
A polyvalent conjugate (recognizing IgG, IgM and IgA) is used to detect the presence of antibodies to Giardia lamblia. A four-fold or greater increase in titer between acute and convalescent sera indicates an acute active phase. A single positive reaction represents previous exposure, since antibody titers are known to remain high for at least six months.