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Table 2 Predictors for Mycobacterium avium subsp. paratuberculosis IS900 qPCR results on individual fecal samples ( n= 2606)

From: Calves shedding Mycobacterium avium subspecies paratuberculosis are common on infected dairy farms

  n (% pos) 1 OR 95% CI P -value
Intercept   0.01 0.00 - 0.05 < 0.01
Pos. env. samples2     0.09
0 196 (1) Reference   
1 – 3 1,276 (10) 11.53 1.33 – 100.04 0.03
4 – 6 1,134 (7) 9.70 1.09 – 86.30 0.04
Random effects   Var. (SE)   % Var.
Herd   0.71 (0.33)   16
Pen   0.50 (0.22)   11
Animal   -   73
  1. Descriptive statistics and final multilevel logistic regression model.
  2. 1Sample size (% IS900 PCR-positive samples).
  3. 2Positive environmental samples: stratification according to the number of culture-positive environmental samples collected from adult cow housing and manure storage areas.