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 (%) 97% (V High) 9.78 21
Liver Fluke (%) 63% (High) 30.88 99

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 (%) 221 583 6% of progeny were TB Reactors 32837 3% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 216 578 6% of progeny were TB Reactors 32319 3% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 250 332 19% of progeny had damaged livers 2587 17% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 245 326 19% of progeny had damaged livers 2533 17% 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 221 216 250 245
Total Progeny Records 583 578 332 326
Average Progeny Prevalence 6% of progeny were TB Reactors 6% of progeny were TB Reactors 19% of progeny had damaged livers 19% of progeny had damaged livers
Total Herdmate Records 32837 32319 2587 2533
Average Herdmate Prevalence 3% of herdmates were TB reactors 3% of herdmates were TB reactors 17% of herdmates had damaged livers 17% 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