[Transovarial and transspermal transmission of Coxiella burneti by the tick Hyalomma asiaticum and its role in the ecology of Q-rickettsiosis].

The transovarial transmission of C. burneti by the tick H. asiaticum was traced on three daughter generations during 751 days. The infection rate of the first generation ticks was found to be 5 times lower than that of the parental ones, of the second generations ticks--9 times lower while F3 population was characterized by 20 fold decrease in the infection rate. The transmission of C. burneti by the infected males of H. asiaticum to the females after copulation was observed in none of the 19 tests. Analysis of the material obtained has shown that the unrestrictedly long "vertical type" maintenance of the Q-rickettsiosis agent in nature is impossible.