Infections may be acute or persistent, the latter being mostly asymptomatic, except while pregnant when the organisms may infect the placenta, leading to abortion, stillbirth, as well as preterm birth. A lot of the stillbirths took place in the 2nd and also very early third trimester. The overall contributions of Q high temperature to stillbirths, as well as the actual geographical circulation of Q fever-associated stillbirths, is unidentified.

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