title: [Methodological aspects in the study of the natural foci of zoonoses].
abstract: Conceptions of different authors on the natural focus of zoonosis infections are analysed and an improved definition of this phenomenon is proposed. The natural focus of disease is the antropoecosystem of certain hierarchic level (biosocial system), where the existence and appearance of the infection agent is supported and the disease is realized in people at certain infection rate.
authors.forename: E I
authors.initials: EI
authors.lastname: Bolotin
mesh_terms: D000818:Animals; D004197:Disease Reservoirs / Q000662:veterinary; D017753:Ecosystem; D006801:Humans; D008722:Methods; D015047:Zoonoses / Q000635:transmission*