BIOS 2210 Lecture Notes - Lecture 7: Actinomyces, Actinobacteria, Cytophaga
14 Sep 2018
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Document Summary
Microbiota: human body is colonized by a vast number of microbes, collectively referred to as the human microbiota. Microbiome: total number of genes in the various species represented in our microbial communities. Biofilms: densely packed communities of microbial cells that grow on living or inert surfaces and surround themselves with secreted polymers. We can pick up microbes from our pets, family members, friends, etc. Resources and cycling of nutrients affect populations. Competition and symbiosis: mutualism, commensalism, parasitism: human microbiota. More firmicutes (grams + rods, lactobacilli, aerobic or facultative) than. Bacteroides (anaerobic gram - rods, fermenters) in obese mice. Disruption or balance of skin microbiota determines health. Propionibacterium acnes - lipophilic inhabitant of the sebaceous unit (production of oil: nasal microbiota. Nasal passages and sinuses are primarily colonized by members of the. Firmicutes, actinobacteria, and proteobacteria: diversity of bacteria. 19 phyla of bacteria, thousands of species. Chlamydia trachomatis - intracellular pathogen: bacteroides.
