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) 6.95 83
Liver Fluke (%) 61% (High) 31.9 83

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 (%) 254 511 6% of progeny were TB Reactors 22969 4% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
May 2025 TB (%) 254 511 6% of progeny were TB Reactors 22969 4% of herdmates were TB reactors Progeny had higher (worse) prevalance than herdmates
Sep 2025 Liver Fluke (%) 298 397 16% of progeny had damaged livers 2084 16% of herdmates had damaged livers Progeny had same prevalance as herdmates
May 2025 Liver Fluke (%) 297 395 15% of progeny had damaged livers 2082 16% of herdmates had damaged livers Progeny had lower (better) 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 254 254 298 297
Total Progeny Records 511 511 397 395
Average Progeny Prevalence 6% of progeny were TB Reactors 6% of progeny were TB Reactors 16% of progeny had damaged livers 15% of progeny had damaged livers
Total Herdmate Records 22969 22969 2084 2082
Average Herdmate Prevalence 4% of herdmates were TB reactors 4% of herdmates were TB reactors 16% of herdmates had damaged livers 16% 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 lower (better) prevalance than herdmates