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) 7.76 65
Liver Fluke (%) 94% (V High) 32.05 75

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 (%) 3323 14493 6% of progeny were TB Reactors 288336 6% of herdmates were TB reactors Progeny had same prevalance as herdmates
May 2025 TB (%) 3323 14493 6% of progeny were TB Reactors 288339 6% of herdmates were TB reactors Progeny had same prevalance as herdmates
Sep 2025 Liver Fluke (%) 1627 1964 50% of progeny had damaged livers 7595 40% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 1625 1962 50% of progeny had damaged livers 7577 40% 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 3323 3323 1627 1625
Total Progeny Records 14493 14493 1964 1962
Average Progeny Prevalence 6% of progeny were TB Reactors 6% of progeny were TB Reactors 50% of progeny had damaged livers 50% of progeny had damaged livers
Total Herdmate Records 288336 288339 7595 7577
Average Herdmate Prevalence 6% of herdmates were TB reactors 6% of herdmates were TB reactors 40% of herdmates had damaged livers 40% of herdmates had damaged livers
Interpretation Progeny had same prevalance as herdmates Progeny had same prevalance as herdmates Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates