[From molecular to genomic and metagenomic epidemiology].

The notion "molecular epidemiology" was introduced into scientific literature by Kilburn E. et al. in 1973. The first period of development of infectious diseases molecular epidemiology may be called "genotypic" (1980-1990s). During this period methodology of molecular marking of pathogens for purposes of monitoring of their spread and outbreak detection (novel nomenclature of diphtheria corynebacteria based on ribotyping; international network PulseNet for monitoring food source infections; international database of tuberculosis mycobacteria spoligotypes) was created. The second--"genomic" period started in the 2000s. Molecular epidemiology rapidly went through single markers (genotypes or single genes) to deciphering the whole genome of pathoge "mobileome", "resistome", "virulome" etc. took an important place in the studies of emerging and pandemic infections. Knowledge on genetic mechanisms leading to emergence and global dissemination of novel pathogens give molecular epidemiology its own scientific content and transforms it from a methodical approach to an independent field of epidemiology. The third--"metagenomic" period starts nowadays based on meta-genomic approach that allows to determine the whole set ofgenomes in the studied sample without the cultivation procedure. In the short-term this would lead to a change of a century-long paradigm of diagnostics and control of infections: instead of search of separate (key) pathogens--characteristics of the full specter of microorganisms in the material from patients and environmental samples with its identification up to any taxonomic depth. In the systems of regional and global epidemiologic control a universal monitoring of all known and re-emerging pathogens with construction and maintenance of metagenomic passports of human habitats will be realized.