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) 8.56 47
Liver Fluke (%) 77% (High) 31.9 83

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 (%) 797 1944 5% of progeny were TB Reactors 102914 4% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 772 1890 5% of progeny were TB Reactors 99510 4% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 662 851 15% of progeny had damaged livers 7208 11% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 652 840 15% of progeny had damaged livers 7147 11% 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 797 772 662 652
Total Progeny Records 1944 1890 851 840
Average Progeny Prevalence 5% of progeny were TB Reactors 5% of progeny were TB Reactors 15% of progeny had damaged livers 15% of progeny had damaged livers
Total Herdmate Records 102914 99510 7208 7147
Average Herdmate Prevalence 4% of herdmates were TB reactors 4% of herdmates were TB reactors 11% of herdmates had damaged livers 11% 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