Chronic Q fever is characterised by '''pneumonia, abortion, rhinitis''' and poor offspring viability in animals. Abortion usually occurs in the '''third trimester''' of gestation and may occur in '''storms''' over 2-4 weeks involving up to 50% of the flock/herd. | Chronic Q fever is characterised by '''pneumonia, abortion, rhinitis''' and poor offspring viability in animals. Abortion usually occurs in the '''third trimester''' of gestation and may occur in '''storms''' over 2-4 weeks involving up to 50% of the flock/herd. |