Table 1. Sensitivity and specificity of microscopy and F1RDT for the diagnosis of human plague cases, Madagascar*.
| Clinical form | Microscopy, 1998–2001 |
F1RDT, 2002–2008 |
|||
|---|---|---|---|---|---|
| Sensitivity | Specificity | Sensitivity | Specificity | ||
| Bubonic | 34% (31%–38%) | 96% (95%–97%) | 100% (99%–100%) | 60% (58%–62%) | |
| Pneumonic |
53% (34%–71%) |
94% (84%–98%) |
|
100% (90%–100%) |
45% (37%–52%) |
| Total | 35% (32%–39%) | 96% (95%–97%) | 100% (99%–100%) | 59% (57%–61%) | |
*Values in parentheses are ranges. Bacteriological culture was used as a reference test. F1RDT, Yersinia pestis antigen fraction 1 rapid diagnostic test.