[Electron microscopy study of the midgut of ticks after experimental infection with Karshi virus].

The guts of H. asiaticum and H. anatolicum ticks infected with Karshi virus and incubated at 22 degrees and 37 degrees C were studied. Virus particles with morphological features of flaviviruses were found 5 days after infection in the cells of the gut of ticks incubated at 22 degrees C and within 24 hours postinfection in the gut cells of the ticks incubated at 37 degrees C. The possible effect of temperature on the rate of development and spread of the infectious process in the gut wall of the midgut of ticks of both species is discussed.