Q-fever, Chlamydiosis and toxoplasmosis are common causes of infectious abortions in goats. Prevention strategies include vaccinating, feeding antibiotics and quarantining new purchases until after kidding. Herds with multiple abortions in a short time frame or abortion rates in excess of three percent to five percent of the total number of pregnant animals should submit samples for diagnosis to avoid further losses.
Source: Iowa State University Extension: Dealing with Abortion in Dairy Goat Herds
It is very important that abortion storms be evaluated for a cause in order to apply appropriate intervention strategies that will decrease disease transmission.