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 (%) 82% (V High) 8.27 53
Liver Fluke (%) 38% (Low) 32.69 64

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 (%) 31 36 6% of progeny were TB Reactors 3833 2% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 31 36 6% of progeny were TB Reactors 3833 2% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 11 12 33% of progeny had damaged livers 58 38% of herdmates had damaged livers Progeny had lower (better) prevalance than herdmates
May 2025 Liver Fluke (%) 11 12 33% of progeny had damaged livers 58 38% of herdmates had damaged livers Progeny had lower (better) 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 31 31 11 11
Total Progeny Records 36 36 12 12
Average Progeny Prevalence 6% of progeny were TB Reactors 6% of progeny were TB Reactors 33% of progeny had damaged livers 33% of progeny had damaged livers
Total Herdmate Records 3833 3833 58 58
Average Herdmate Prevalence 2% of herdmates were TB reactors 2% of herdmates were TB reactors 38% of herdmates had damaged livers 38% of herdmates had damaged livers
Interpretation Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates Progeny had lower (better) prevalance than herdmates Progeny had lower (better) prevalance than herdmates