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Table 7 Number (proportion; 95% CI) of ELISA positive cows in each fPCR category from 3 years (2013–2016) of whole herd testing on a NZ pastoral dairy farm for Mycobacterium avium subsp. paratuberculosis infection using 4 ELISA tests conducted in parallel

From: Control of Mycobacterium avium subsp. paratuberculosis infection on a New Zealand pastoral dairy farm

fPCR statusLactation year
2013–20142014–20152015–2016
Not Detected240 (80.1%; 76.3–85.3)82 (75.9%; 67.8–84.0)38 (76.0%; 64.2–87.8)
Moderate29 (9.8%; 6.4–13.1)9 (8.3%; 3.1–13.5)7 (14.0%; 4.4–23.6)
High28 (9.4%; 6.1–12.8)17 (15.7%; 8.9–22.6)5 (10%; 1.7–18.3)