Normal Flora Flashcards
What two microbiota are found in the GI tract?
Bacteroidetes and Firmicutes
What is microbiota?
also known as normal flora, colonizes every surface of the human body exposed to external environment.
What is the term dysbiosis?
it is microbiota disruption has been proposed to contribute to obesity, cardiovascular disease, colon cancer and other conditions
the firmicutes?
The Firmicutes are a phylum of bacteria, most of which have Gram-positive cell wall structure. A few, however, such as
The Proteobacteria?
The Proteobacteria are a major group of Gram-negative bacteria. They include a wide variety of pathogens, such as Escherichia, Salmonella, Vibrio, Helicobacter, Yersinia, and many other notable genera.
Are probiotics approved for clinical use by the FDA?
No, they are recognized as GRAS generally recognized as safe but are not approved for clinical use.
What is the rule when recommending probiotics to your future patients?
Always use reasoning, is the patient immunocomprised?
What features should the ideal probiatic have?
Should survive stomach acid and intestinal bile, multiply within the human intestine, attach to human epithelial cells, produce antimicrobial substances.
Lactobacillus GG has been chosen for probiotic intervention because it has these features and prevent adherence of E.coli 0157 H:7 and produces a substance effective against some pathogenic bacteria.
What are some examples of complications after probiotic use?
the supplementation with Lactobacillus rhamnosus GG has been associated with the development of sepsis with a cause effect relationship in six newborns and children being treated for necrotizing enterocolitis.
Where are a large number of microorganisms found?
The large intestines contain a large amount of microorganisms.
what bacteria is found in high osmotic pressure in salty sweat?
Staphylococci
What is meant by habitat filter?
a collection of resources and conditions that allow for the growth of some microbes but not others resulting in selection of microbial traits that permit survival and growth in the host
what is meant but the human body and its symbionts?
can be viewed as communities of interacting cells.
where does Propionibacterium acnes predominates?
, the sebaceous glands of the face, scalp, chest and back produce large amount of oily sebum and are the sites where the lipophilic anaerobe propionibacterium predominates
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Streptococci are rarely seen on normal skin because of the presence of lipid on the skin which is lethal to
