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 (%) 96% (V High) 8.54 47
Liver Fluke (%) 60% (High) 32.91 25

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 (%) 124 323 4% of progeny were TB Reactors 20163 2% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 121 314 4% of progeny were TB Reactors 19961 2% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 103 122 13% of progeny had damaged livers 1178 13% of herdmates had damaged livers Progeny had same prevalance as herdmates
May 2025 Liver Fluke (%) 102 121 13% of progeny had damaged livers 1171 13% of herdmates had damaged livers Progeny had same prevalance as 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 124 121 103 102
Total Progeny Records 323 314 122 121
Average Progeny Prevalence 4% of progeny were TB Reactors 4% of progeny were TB Reactors 13% of progeny had damaged livers 13% of progeny had damaged livers
Total Herdmate Records 20163 19961 1178 1171
Average Herdmate Prevalence 2% of herdmates were TB reactors 2% of herdmates were TB reactors 13% of herdmates had damaged livers 13% of herdmates had damaged livers
Interpretation Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates Progeny had same prevalance as herdmates Progeny had same prevalance as herdmates