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) 7.71 66
Liver Fluke (%) 57% (Average) 32.83 29

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 (%) 284 2019 2% of progeny were TB Reactors 53611 3% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
May 2025 TB (%) 265 1832 2% of progeny were TB Reactors 50395 3% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
Sep 2025 Liver Fluke (%) 236 367 15% of progeny had damaged livers 2950 12% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 222 350 16% of progeny had damaged livers 2851 12% 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 284 265 236 222
Total Progeny Records 2019 1832 367 350
Average Progeny Prevalence 2% of progeny were TB Reactors 2% of progeny were TB Reactors 15% of progeny had damaged livers 16% of progeny had damaged livers
Total Herdmate Records 53611 50395 2950 2851
Average Herdmate Prevalence 3% of herdmates were TB reactors 3% of herdmates were TB reactors 12% of herdmates had damaged livers 12% of herdmates had damaged livers
Interpretation Progeny had lower (better) prevalance than herdmates Progeny had lower (better) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates