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) 6.58 88
Liver Fluke (%) 73% (High) 32.24 63

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 (%) 501 1151 5% of progeny were TB Reactors 38254 6% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
May 2025 TB (%) 500 1150 5% of progeny were TB Reactors 38006 6% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
Sep 2025 Liver Fluke (%) 353 481 38% of progeny had damaged livers 2479 23% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 350 478 38% of progeny had damaged livers 2479 23% 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 501 500 353 350
Total Progeny Records 1151 1150 481 478
Average Progeny Prevalence 5% of progeny were TB Reactors 5% of progeny were TB Reactors 38% of progeny had damaged livers 38% of progeny had damaged livers
Total Herdmate Records 38254 38006 2479 2479
Average Herdmate Prevalence 6% of herdmates were TB reactors 6% of herdmates were TB reactors 23% of herdmates had damaged livers 23% 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