[1] Rostov Sci Res Inst Microbiol & Parasitol, Rostov Na Donu, Russia
[2] St Petersburg State Pediat Med Univ, Minist Hlth Russian Federat, St Petersburg, Russia
[3] Cent Res Inst Epidemiol, Moscow, Russia
[4] Russian Med Acad Continuous Profess Educ, Moscow, Russia
[5] SM Kirov Mil Med Acad, Minist Def Russian Federat, St Petersburg, Russia