TABLE 5.

Evaluation of Western blot interpretation criteria for B. henselae endocarditis^a

Criterion(s) (bands required)	B. henselae infectionb		Bartonella sp. endocarditisc
	Sensitivity (%)	Specificity (%)	Sensitivity (%)	Specificity (%)	PPV (%)
No. of B. henselae bands ≥ no. of B. quintana band(s) + 2	41.7	100.0	41.7	100.0	100.0
≥2 of Bh65, Bh45, and/or Bh35	100.0	100.0	100.0	10.8	26.7

^aRecommended criteria are in boldface.

^bSensitivity and specificity of the various criteria were determined for all sera tested from patients with B. henselae infection (n = 22).

^cSensitivity, specificity, and PPV of the various criteria were determined for all sera tested from patients with Bartonella endocarditis (n = 49).