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 (%) 99% (V High) 8.24 54
Liver Fluke (%) 79% (High) 32.69 64

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 (%) 765 1864 5% of progeny were TB Reactors 102139 4% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 747 1837 5% of progeny were TB Reactors 99077 4% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 643 921 18% of progeny had damaged livers 6759 13% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 636 915 18% of progeny had damaged livers 6693 13% 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 765 747 643 636
Total Progeny Records 1864 1837 921 915
Average Progeny Prevalence 5% of progeny were TB Reactors 5% of progeny were TB Reactors 18% of progeny had damaged livers 18% of progeny had damaged livers
Total Herdmate Records 102139 99077 6759 6693
Average Herdmate Prevalence 4% of herdmates were TB reactors 4% of herdmates were TB reactors 13% of herdmates had damaged livers 13% 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