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  • Title: Repeated pregnancies in BALB/c mice infected with Coxiella burnetii cause disseminated infection, resulting in stillbirth and endocarditis.
    Author: Stein A, Lepidi H, Mege JL, Marrie TJ, Raoult D.
    Journal: J Infect Dis; 2000 Jan; 181(1):188-94. PubMed ID: 10608766.
    Abstract:
    Q fever is a widespread zoonosis caused by the obligate intracellular bacterium Coxiella burnetii. Although this highly virulent organism is most concentrated in mammals during parturition, there are few reports on the manifestations of perinatal Q fever in the human and animal host. The affinity of C. burnetii to pregnancy and its abortifacient potential were investigated in a murine animal model. Intraperitoneal infection of female BALB/c mice with C. burnetii, followed by repeated pregnancies over a 2-year period, resulted in persistent infection associated with abortion and perinatal death, with a statistically significant decrease in viable offspring. In addition, endocarditis occurred in 2 of the adult animals, and C. burnetii antigen and DNA were detected in their heart valves. Taken together, these results demonstrate the abortifacient potential of C. burnetii and the increased risk of persistent infection and endocarditis in pregnant mice, probably related to a decline in cellular immunity during pregnancy.
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