Verkhovsky R. A. RussiaSaratovSaratov State University , 83, Astrakhanskaya str., Saratov, 410012, Russia r.a.verhovskiy@mail.ru Author's articles АССОЦИАТИВНЫЕ МИКРООРГАНИЗМЫ НАСЕКОМЫХ ПОДОТРЯДА ЦИКАДОВЫЕ (HOMOPTERA, CICADINEA) Biological Properties of Bacteria – Assiociants Aphis Pomi Degeer, 1773 Biological Properties of Bacteria – Assiociants Schizaphis graminum Rondani, 1852 Study of the Polymorphism DEFB4A Gene in Individuals Suffering from Periodontal Inflammatory Diseases