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) 6.68 87
Liver Fluke (%) 62% (High) 30.67 100

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 (%) 248 649 4% of progeny were TB Reactors 23794 5% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
May 2025 TB (%) 245 645 4% of progeny were TB Reactors 23331 5% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
Sep 2025 Liver Fluke (%) 236 293 23% of progeny had damaged livers 1919 21% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 237 294 23% of progeny had damaged livers 1913 21% 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 248 245 236 237
Total Progeny Records 649 645 293 294
Average Progeny Prevalence 4% of progeny were TB Reactors 4% of progeny were TB Reactors 23% of progeny had damaged livers 23% of progeny had damaged livers
Total Herdmate Records 23794 23331 1919 1913
Average Herdmate Prevalence 5% of herdmates were TB reactors 5% of herdmates were TB reactors 21% of herdmates had damaged livers 21% 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