Table 3 Sample preparation analysis: diagnostic sensitivity and specificity comparing the VETSCAN IMAGYST centrifugal flotation (VS-Ic) and OVASSAY passive flotation (O-pf) methods versus a conventional centrifugal flotation method (reference); all slides were read by an expert
|  | Feline Ancylostoma | Toxocara cati | Cystoisosporaa | Giardia | ||||
|---|---|---|---|---|---|---|---|---|
n = 80 | n = 80 | n = 200 | n = 100 | |||||
VS-Ic | O-pf | VS-Ic | O-pf | VS-Ic | O-pf | VS-Ic | O-pf | |
True positive | 19 | 17 | 34 | 33 | 23 | 22 | 32 | 22 |
False positive | 0 | 0 | 0 | 0 | 4 | 1 | 1 | 0 |
True negative | 61 | 61 | 44 | 44 | 161 | 164 | 60 | 61 |
False negative | 0 | 2 | 2 | 3 | 12 | 13 | 7 | 17 |
Sensitivity (95% confidence interval) | 100 (87.8–100) | 89.5 (70.3–97.7) | 94.4 (83.4–98.8) | 91.7 (79.4–97.6) | 65.7 (49.2–79.7) | 62.9 (46.3–77.3) | 82.1 (68.0–91.6) | 56.4 (40.9–71.1) |
Specificity (95% confidence interval) | 100 (96.0–100) | 100 (96.0–100) | 100 (94.5–100) | 100 (94.5–100) | 97.6 (94.3–99.2) | 99.4 (97.2–99.9) | 98.4 (92.6–99.8) | 100 (96.0–100) |