
Number of cows

Number of samples

Fraction of positive cows

Fraction of high shedders

Risk per day

Fraction of positive samples


Study 1

1028

4259

0.586576

0.003891

0.000006

0.012235

Study 2

695

2692

0.726619

0.002878

0.00005

0.027256

Study 3

1072

6112

0.991604

0.182836

0.0002

0.12309

 First column is number of different cows, followed by Total number of samples. The following column is the fraction of cows that were ever positive, and the fraction of cows that were ever high shedders. The following columns are the risk per day of becoming high shedder for any cow, and the fraction of all samples that were positive.