The clinical features of the modern forms of neuroinfections were studied in this work — infectiously-allergic encephalitis. There were selected the leading etiologic factors, the unfolded description of clinical features of hearth and general brain syndromes (with predominance of the last) is presented at these forms of modern neuroinfections. Predominance of the general brain irritative character of the process, which is providing the diff usedness of defeat of the CNS with primary topical accents in the structures of limbicodiencephalic complex is rotined. This defeat of diff erent links of the regulator cerebral systems substantially infl uences on integrative activity of the brain and stipulates an original clinical picture at irritative neuroinfective process.