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) 9.05 35
Liver Fluke (%) 77% (High) 32.94 24

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 (%) 650 2939 4% of progeny were TB Reactors 91662 3% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 613 2794 4% of progeny were TB Reactors 86764 3% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 577 864 12% of progeny had damaged livers 7580 8% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 560 843 12% of progeny had damaged livers 7454 8% 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 650 613 577 560
Total Progeny Records 2939 2794 864 843
Average Progeny Prevalence 4% of progeny were TB Reactors 4% of progeny were TB Reactors 12% of progeny had damaged livers 12% of progeny had damaged livers
Total Herdmate Records 91662 86764 7580 7454
Average Herdmate Prevalence 3% of herdmates were TB reactors 3% of herdmates were TB reactors 8% of herdmates had damaged livers 8% 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