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) 8.94 37
Liver Fluke (%) 86% (V High) 32.55 44

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 (%) 1274 6574 7% of progeny were TB Reactors 127750 5% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 1273 6570 7% of progeny were TB Reactors 127555 5% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 393 464 52% of progeny had damaged livers 2023 41% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 393 464 52% of progeny had damaged livers 2022 41% 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 1274 1273 393 393
Total Progeny Records 6574 6570 464 464
Average Progeny Prevalence 7% of progeny were TB Reactors 7% of progeny were TB Reactors 52% of progeny had damaged livers 52% of progeny had damaged livers
Total Herdmate Records 127750 127555 2023 2022
Average Herdmate Prevalence 5% of herdmates were TB reactors 5% of herdmates were TB reactors 41% of herdmates had damaged livers 41% 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