TABLE 4.

Evaluation of Western blot interpretation criteria for B. quintana endocarditisa

Criterion(s) (bands required)B. quintana infectionbBartonella sp. endocarditisc
Sensitivity (%)Specificity (%)Sensitivity (%)Specificity (%)PPV (%)
≥1 of any B. quintana band and ≥2 of any B. henselae bands97.090.997.033.381.8
≥7 of any B. quintana bands or no. of B. quintana bands ≥ no. of B. henselae bands + 281.1100.081.1100.0100.0
≥1 of Bq83 and/or Bq10100.0100.0100.083.394.9
≥3 of Bq83, Bq45, Bq35, Bq30, and/or Bq2097.390.997.383.394.7
  • a Recommended criteria are in boldface.

  • b Sensitivity and specificity of the various criteria were determined for all tested sera from patients with B. quintana infection (n = 48).

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