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 (%) 76% (High) 11.49 4
Liver Fluke (%) 30% (Low) 32 78

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 (%) 11 17 18% of progeny were TB Reactors 922 19% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
May 2025 TB (%) 10 15 20% of progeny were TB Reactors 890 20% of herdmates were TB reactors Progeny had same prevalance as herdmates
Sep 2025 Liver Fluke (%) 8 10 40% of progeny had damaged livers 39 36% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 8 10 40% of progeny had damaged livers 39 36% 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 11 10 8 8
Total Progeny Records 17 15 10 10
Average Progeny Prevalence 18% of progeny were TB Reactors 20% of progeny were TB Reactors 40% of progeny had damaged livers 40% of progeny had damaged livers
Total Herdmate Records 922 890 39 39
Average Herdmate Prevalence 19% of herdmates were TB reactors 20% of herdmates were TB reactors 36% of herdmates had damaged livers 36% of herdmates had damaged livers
Interpretation Progeny had lower (better) prevalance than herdmates Progeny had same prevalance as herdmates Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates