[Cognitive impairment. The effects of seizures?].

This review discusses articles on cognitive impairments developing after one or more convulsive seizures. Cognitive disorders seem to be frequent complications of epilepsy. According to recent clinical studies, the intensity of cognitive declines depends on a frequency and severity of seizures.

[Induction of mutations in mammalian cells by the action of live vaccinal strains of poliomyelitis virus].

The attenuated strains' poliomyelitis virus induces mutagenesis in human and Chinese hamster cultured cells. The mutagenic action of the poliovirus is detected at chromosome and gene levels and directly depends on the multiplicity of cell infection. Possibilities for developing nonmutagenic antivirus vaccines are discussed.

[Characteristics of structural chromosome aberrations induced by type 1 adenovirus in human and Chinese hamster cells in vitro].

Adenovirus multiplies in both studied cultures. In the Chinese hamster cells infection is of slowed down, cyclic character. In this case a short subcultivation of cells infected with the virus and the study of the damage distribution in groups of chromosomes are possible.