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) 8.91 38
Liver Fluke (%) 53% (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 (%) 155 371 4% of progeny were TB Reactors 20464 4% of herdmates were TB reactors Progeny had same prevalance as herdmates
May 2025 TB (%) 131 318 3% of progeny were TB Reactors 17317 4% of herdmates were TB reactors Progeny had lower (better) prevalance than herdmates
Sep 2025 Liver Fluke (%) 106 171 7% of progeny had damaged livers 2306 4% of herdmates had damaged livers Progeny had higher (worse) prevalance than herdmates
May 2025 Liver Fluke (%) 102 165 7% of progeny had damaged livers 2265 4% 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 155 131 106 102
Total Progeny Records 371 318 171 165
Average Progeny Prevalence 4% of progeny were TB Reactors 3% of progeny were TB Reactors 7% of progeny had damaged livers 7% of progeny had damaged livers
Total Herdmate Records 20464 17317 2306 2265
Average Herdmate Prevalence 4% of herdmates were TB reactors 4% of herdmates were TB reactors 4% of herdmates had damaged livers 4% of herdmates had damaged livers
Interpretation Progeny had same prevalance as herdmates Progeny had lower (better) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates Progeny had higher (worse) prevalance than herdmates