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) 9.31 29
Liver Fluke (%) 93% (V High) 32.2 66

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 (%) 2046 6443 6% of progeny were TB Reactors 237045 4% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 2017 6395 6% of progeny were TB Reactors 233376 4% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 2843 3821 18% of progeny had damaged livers 22643 15% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 2816 3792 18% of progeny had damaged livers 22505 15% 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 2046 2017 2843 2816
Total Progeny Records 6443 6395 3821 3792
Average Progeny Prevalence 6% of progeny were TB Reactors 6% of progeny were TB Reactors 18% of progeny had damaged livers 18% of progeny had damaged livers
Total Herdmate Records 237045 233376 22643 22505
Average Herdmate Prevalence 4% of herdmates were TB reactors 4% of herdmates were TB reactors 15% of herdmates had damaged livers 15% 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