TABLE 1.
Sensitivities and specificities of B. henselae assaysa
| IFA | Test groupb | n | Positive (n) | Negative (n) | Sensitivity (%) | Specificity (%) |
|---|---|---|---|---|---|---|
| IgG (test A) | PCR, H | 20 | 20 | 0 | 100 | |
| Clinical | 22 | 22 | 0 | 100 | ||
| Control (total) | 270 | 81 | 189 | 70 | ||
| Controlc | 100 | 25 | 75 | 75 | ||
| LA | 55 | 5 | 50 | 91 | ||
| IgM (test A) | PCR, H | 20 | 16 | 4 | 80 | |
| Clinical | 22 | 21 | 1 | 95 | ||
| Controlc | 100 | 5 | 95 | 95 | ||
| IgG (test B) | PCR, H | 20 | 17 | 3 | 85 | |
| Clinical | 22 | 22 | 0 | 100 | ||
| Controlc | 100 | 27 | 73 | 73 | ||
| IgM (test B) | PCR, H | 20 | 10 | 10 | 50 | |
| Clinical | 22 | 17 | 5 | 77 | ||
| Controlc | 100 | 14 | 86 | 86 |
a
Sensitivity was determined by dividing the number of positive cases by the total number of cases and multiplying the quotient by 100; specificity was determined by dividing the number of negative controls by the total number of controls and multiplying the quotient by 100.
b
PCR, H, patients for whom PCR and histologic analysis results were consistent with CSD; clinical, patients clinically suspected of having CSD; LA, patients with lymphadenopathy caused by infectious agents other than Bartonella spp.
c
Sera from the first 100 healthy adults in group C.