Flashcards in Normal Flora or Pathogen?/Antimicrobials Deck (65)
What three interactions can define the relationships of humans and their bacteria?
Commensalism, Mutualism, Parasitism
What is commensalism?
One benefits, other gets neither benefit nor harm
How might we benefit from commensal bacteria?
They compete with harmful bacteria
Important examples of mutualism in gut bacteria
Regulation of pro-antiinflammatory T-cell switch
Loss of certain bac associated with Crohn's
Interactions with hormones
Alteration in microbiota of URT associated with...
Significance of resident flora?
Very unique for each individual body part
Name for organisms that are not normally pathogenic, but can cause disease under special circumstances?
Three special circumstances that pathobionts may play into?
Why is skin hard to colonize?
Three primary bacterial organisms associated with the skin.
Propionibacterium acnes (in oily spots)
What part of the skin colonizes G-
What part of the epidermis has a substantially different microbial community from the others? Why?
Acidic conditions let lactobacilis take over
Three primary bacterium of the nasopharynx?
Staph epidermis (and sometimes aureus)
Diptheroids (chinese characters)
Four opportunistic bacteria associated with nasopharynx?
Bacteria at the base of dental plaques
Four most important resident bacteria of the mouth and oropharynx?
alpha-hemolytic Strep (including mutans)
Staph epidermis (and aureus)
Most important bacteria of the stomach?
Most important bacteria of the duodenum?
Most important bacteria of jejuno-ileum?
G- Anerobes (Bacteroides)
Most important bacteria of the colon?
Three gut enterotypes important for establishment of digestive health?
What bacteria is more prevalent in high fat diets? high fiber diets?
fat -- Bacteroides
Fiber -- Prevotella
Relationship of bacteria to gut flora
They don't directly contact eachother, or inflammation will occur.
Most common bacteria of the vagina
Changes in vaginal pH over the life cycle?
Acidic at birth
neutral till puberty, then acidic again
Most common bacteria of conjunctiva?
List Six Sterile Areas
Lungs beyond trachea
Internal organs (minus digestive tract)
Fluids (Blood, Lymph, Semen)
Ear beyond Eardrum
Difference between viral and bacterial latency
In bacterial latency, organism is still present, but in lower numbers
Three types of adhesion factors involved in virulence factors.