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 (%) 96% (V High) 5.08 99
Liver Fluke (%) 41% (Average) 32.46 50

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 (%) 159 422 6% of progeny were TB Reactors 20465 8% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
May 2025 TB (%) 158 421 6% of progeny were TB Reactors 20342 8% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
Sep 2025 Liver Fluke (%) 25 25 52% of progeny had damaged livers 118 49% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 25 25 52% of progeny had damaged livers 117 49% 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 159 158 25 25
Total Progeny Records 422 421 25 25
Average Progeny Prevalence 6% of progeny were TB Reactors 6% of progeny were TB Reactors 52% of progeny had damaged livers 52% of progeny had damaged livers
Total Herdmate Records 20465 20342 118 117
Average Herdmate Prevalence 8% of herdmates were TB reactors 8% of herdmates were TB reactors 49% of herdmates had damaged livers 49% 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