How does the SNAP 4Dx A. phagocytophilum test differ from an IFA test?
• The SNAP 4Dx A. phagocytophilum test uses a synthetic peptide to detect antibodies to A. phagocytophilum. The synthetic peptide mimics a specific region of an outer membrane protein found in the A. phagocytophilum organism. • The IFA test is a whole-cell preparation that may show cross-reactivity with other Anaplasma and Ehrlichia species.