Applied Microbiology

Normal Flora of Human Body

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A diverse microbial flora is associated with the skin and mucous membranes of all people, from birth to death. The human body, which contains about 1013 cells, normally contains about 1014 bacteria .This bacterial population forms the normal microbial flora. The normal microbial flora is relatively stable, and certain genera inhabit different parts of the body at certain stages of life. Microorganisms in the normal phytophagous fauna help the host (by competing for the microenvironment more effectively than pathogens such as Salmonella, or by producing nutrients that the host can use) and harm the host (worm teeth). By causing abscesses or other infections), or as symbiotic organisms (they inhabit the host for long periods of time without causing recognizable harm or benefit). Most of the elements of the normal microbiota that inhabit human skin, nails, eyes, oropharynx, genitals, and gastrointestinal tract are harmless to healthy people, but these microbes often cause disease in debilitated hosts. Viruses and parasites are not symbiotic organisms and do not help the host, so most researchers do not consider them members of the normal microbiota.

Related Associations and Societies

Italian Society for Microbiology,German Society of Hygiene and Microbiology¸  Spanish Society for Microbiology¸ Swedish Society for Microbiology ¸Viruses: National Multiple Sclerosis Society¸ Infectious Diseases Society of America¸Swiss Society for Infectious Disease.