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 (%) 78% (High) 6.8 85
Liver Fluke (%) 40% (Average) 32.2 66

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 (%) 16 19 0% of progeny were TB Reactors 2130 2% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
May 2025 TB (%) 15 18 0% of progeny were TB Reactors 1980 2% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
Sep 2025 Liver Fluke (%) 21 22 27% of progeny had damaged livers 172 17% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 21 22 27% of progeny had damaged livers 171 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 16 15 21 21
Total Progeny Records 19 18 22 22
Average Progeny Prevalence 0% of progeny were TB Reactors 0% of progeny were TB Reactors 27% of progeny had damaged livers 27% of progeny had damaged livers
Total Herdmate Records 2130 1980 172 171
Average Herdmate Prevalence 2% of herdmates were TB reactors 2% of herdmates were TB reactors 17% of herdmates had damaged livers 17% 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