Case 209. 

Coxiella burnetti in a mouse splenic macrophage (Gimenez)
　 　 　 　
　 C. burnetti, a causative agent of Q fever, is an obligate intracellular Gram-negative bacterium. Ticks transmit the microbes to animals. Human infection is mainly tranmitted by droplets containing Coxiella of animal origin. 　
　 　 　 　

　

 　 Q fever is often presented as atypical pneumonia, accompanying influenza-like signs and symptoms. This zoonotic pathogen of rickettsia group is resistant to heat, dryness and disinfectant, so that it is nominated as a bioterrorist.