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Percent positive results on the SNAP and VetScan tests for samples within different reciprocal indirect immunofluorescent antibody (IFA) test titer ranges. Of 118 IFA-positive samples, the number of samples within each of the reciprocal IFA titer ranges was 22 (50–100), 52 (200–400), 29 (800–1,600), and 15 (≥3,200).
