Oestral cycles and conception rates in two Trichomonas foetus infected dairy herds in Queensland

Abstract

Data are presented for two Queensland dairy herds comprising 132 cows. Oestral cycles following service, and where no evidence of abortion was noted were delayed and irregular in both herds, but the pattern of returns differed. Differences in both service cycles and conception rates occurred between these two herds and. no single pattern emerged which may be considered typical of trichomoniasis from a diagnostic viewpoint.