EFFECT OF LOW-INTENSIVE RADIATION ON THE COURSE OF EXPERIMENTAL TICK-BORNE ENCEPHALITIS

Effects of low-intensive laser exposure in the 630 to 890 nm waveband on the course of experimental tick-borne encephalitis were studied in vitro and in vivo. Virus-static effect of the exposure was revealed: t iters of the exposed virus dropped, infective activity decreased, and interferon production was inhibited. The exposure had no apparent effe ct on the virus which penetrated into the cells. In addition to its ma nifest prophylactic effect, low-intensive laser exposure is capable of activating the infectious process during the acute period of tick-bor ne encephalitis by causing more frequent and sooner death of animals. Effects of interferon inducers during the acute period of viral infect ions are discussed.