Q fever farm cases

Mary farms 100 pedigree Holstein cows; a winter housed and spring grazed autumn calving herd.  Producing 10,400 litres from twice a day milking.  The herd had experienced problems with abortions, an extended calving interval time, early pregnancy losses, metritis and low heat detection.

Andrew farms 300 predominantly Holstein cows, all year round calving, averaging 10,500 litres per year. The herd was experiencing low conception rates, poor fertility, many mid-term losses and cows drying off empty.