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 (%) 94% (V High) 6.75 86
Liver Fluke (%) 52% (Average) 32.47 49

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 (%) 107 245 5% of progeny were TB Reactors 9883 6% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
May 2025 TB (%) 107 245 5% of progeny were TB Reactors 9882 6% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
Sep 2025 Liver Fluke (%) 142 199 25% of progeny had damaged livers 907 21% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 139 196 24% of progeny had damaged livers 889 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 107 107 142 139
Total Progeny Records 245 245 199 196
Average Progeny Prevalence 5% of progeny were TB Reactors 5% of progeny were TB Reactors 25% of progeny had damaged livers 24% of progeny had damaged livers
Total Herdmate Records 9883 9882 907 889
Average Herdmate Prevalence 6% of herdmates were TB reactors 6% 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