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 (%) 93% (V High) 8.93 37
Liver Fluke (%) 38% (Low) 32.43 52

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 (%) 52 249 4% of progeny were TB Reactors 11649 2% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 45 201 2% of progeny were TB Reactors 10024 2% of herdmates were TB reactors Progeny had same prevalance as herdmates
Sep 2025 Liver Fluke (%) 15 19 21% of progeny had damaged livers 169 20% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 15 18 22% of progeny had damaged livers 158 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 52 45 15 15
Total Progeny Records 249 201 19 18
Average Progeny Prevalence 4% of progeny were TB Reactors 2% of progeny were TB Reactors 21% of progeny had damaged livers 22% of progeny had damaged livers
Total Herdmate Records 11649 10024 169 158
Average Herdmate Prevalence 2% of herdmates were TB reactors 2% of herdmates were TB reactors 20% of herdmates had damaged livers 21% of herdmates had damaged livers
Interpretation Progeny had higher (worse) prevalance than herdmates Progeny had same prevalance as herdmates Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates