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) 6.83 85
Liver Fluke (%) 76% (High) 32.3 60

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 (%) 536 1431 3% of progeny were TB Reactors 75004 3% of herdmates were TB reactors Progeny had same prevalance as herdmates
May 2025 TB (%) 517 1395 3% of progeny were TB Reactors 72672 3% of herdmates were TB reactors Progeny had same prevalance as herdmates
Sep 2025 Liver Fluke (%) 594 792 16% of progeny had damaged livers 6036 12% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 585 783 16% of progeny had damaged livers 5951 12% 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 536 517 594 585
Total Progeny Records 1431 1395 792 783
Average Progeny Prevalence 3% of progeny were TB Reactors 3% of progeny were TB Reactors 16% of progeny had damaged livers 16% of progeny had damaged livers
Total Herdmate Records 75004 72672 6036 5951
Average Herdmate Prevalence 3% of herdmates were TB reactors 3% of herdmates were TB reactors 12% of herdmates had damaged livers 12% of herdmates had damaged livers
Interpretation Progeny had same prevalance as herdmates Progeny had same prevalance as herdmates Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates