3.4. Bartonella spp. IgG ELISA
The overall prevalence of Bartonella spp. IgG antibodies in serum
was 65.4%. The reciprocal titers ranged from 64 to 1024. When
the Bartonella spp. IgG and PCR assay results were paired, 44.4%
had agreement between ELISA and PCR assay results (20 cats were
both IgG and PCR positive and 48 cats were both IgG and PCR negative).
Of the 153 cats, 52.3% were IgG positive but PCR negative,
and 3.3% were IgG negative but PCR positive.