Flashcards in Last ppt Deck (134)
How dense is the population of the oral cavity microbiom?
Very densely populated
Does the entire mouth contain the same uniform type of microflora?
No, differeent regions are colonized by different types of bacteria
How much of the microflora in the oral cavity has not been established?
Half! Very complex
How is the skin's microbiome distributed?
Thinly spread out over large surface area
What type of bacteria is skin microbiome dominated by?
What part of the urinary tract is not sterile?
distal region of urethra
How is the vaginal microflora populated?
What is the predominant bacteria in vaginal microflora?
What is the microflora of the upper respiratory tract like?
What is the composition of the uper respiratory tract's microflora dependent on?
How are the microflora of the lungs and internal tissues similar?
What 4 parts is the GI tract made up of?
Stomach, duodenum, jejunum, colon
What is the population density of the colon versus the stomach?
Stomach: sparcely populated
Colon: very densely populated
Which part of the human body contains most of the bacteria inhabiting humans? How much?
What are commensals?
Microorganisms normally found on healthy individuals
Do commensals cause infection?
No, commensals colonize the body without infecting it
How many microbes are on the skin?
How many microbes are in the mouth?
How many microbes are in the GI tract? What is the weight equivalent?
Where are most of the GI tract's microbes located? What %? Aerobic or anaerobic?
What 4 factors influence the richness and abundance of microorganisms on an individual?
3. Nutrient supply
4. Immune system (genetic factor)
In what 3 ways can commensals be beneficial?
1. provide host with vitamins and metabolic pathways (gut)
2. Protect against new incoming microbial populations (guard their territory)
3. Teach the immune system
Do all animals contain the same commensals?
No, commensals in one animal's body may harm a different animal
Can commensals become parasitic/pathogenic?
Yes under specific conditions
What are pathogens?
Microbial parasites that are unable to cause infection
What is an infection?
A situation in which a microorganism is established and growing in a host, causing damage.
What is a disease?
Damage or injury to the host that impairs host function
What is pathogenicity?
ability of a parasite to inflict damage to the host
What is virulence?
measure of pathogenicity