Breeding can help protect your herd from TB and Liver Fluke infection.

PTAs are interpretative of the expected prevalence of TB or Liver Fluke infection in that animal's progeny.
Therefore, lower PTAs are more desirable.

Across All Dairy Breeds

Trait Reliability PTA Percentile
TB (%) 98% (V High) 8.95 37
Liver Fluke (%) 69% (High) 31.62 93

Progeny and Herdmate Performance

Date of Evaluation Trait Total Herds Total Progeny Records Average Progeny Prevalence Total Herdmate Records Average Herdmate Prevalence Interpretation
Sep 2025 TB (%) 549 1552 5% of progeny were TB Reactors 79628 3% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 521 1491 4% of progeny were TB Reactors 75713 3% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 379 537 15% of progeny had damaged livers 5106 12% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 366 523 15% of progeny had damaged livers 5000 12% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
Field TB (Current) TB (Previous) Liver Fluke (Current) Liver Fluke (Previous)
Date of Evaluation Sep 2025 May 2025 Sep 2025 May 2025
Trait TB (%) TB (%) Liver Fluke (%) Liver Fluke (%)
Total Herds 549 521 379 366
Total Progeny Records 1552 1491 537 523
Average Progeny Prevalence 5% of progeny were TB Reactors 4% of progeny were TB Reactors 15% of progeny had damaged livers 15% of progeny had damaged livers
Total Herdmate Records 79628 75713 5106 5000
Average Herdmate Prevalence 3% of herdmates were TB reactors 3% of herdmates were TB reactors 12% of herdmates had damaged livers 12% of herdmates had damaged livers
Interpretation Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates