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 (%) 98% (V High) 9.4 27
Liver Fluke (%) 40% (Average) 33.07 17

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 (%) 155 881 3% of progeny were TB Reactors 33357 2% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 146 832 3% of progeny were TB Reactors 30693 2% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 81 117 18% of progeny had damaged livers 1089 12% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 75 111 19% of progeny had damaged livers 1049 13% 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 155 146 81 75
Total Progeny Records 881 832 117 111
Average Progeny Prevalence 3% of progeny were TB Reactors 3% of progeny were TB Reactors 18% of progeny had damaged livers 19% of progeny had damaged livers
Total Herdmate Records 33357 30693 1089 1049
Average Herdmate Prevalence 2% of herdmates were TB reactors 2% of herdmates were TB reactors 12% of herdmates had damaged livers 13% 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