Gastrointestinal microbes

Which are the major defenses of the gastrointestinal tract?

• Tonsils and adenoids

• Appendix

• Peyer's patches in small intestine

• Stomach acid

• Mucus

What is an example of a species that makes a biofilm in the mouth?

• Alpha hemolytic streptococci

• Giardia lambia

• Salmonella typhi

• Listeria monocytogenes

Ulcers in the stomach and intestines are caused by a bacteria.

• True

• False

If you experience dozens of bouts of diarrhea in childhood, you are more likely to have permanent cognitive and physical defects.

• True

• False

What is the main source of acute diarrhea in the US?

• Soil

• Food

• Hospital stays

• Water

Why is it uncommon to test for the causative agent of food poisonings?

• Because there are too many possible sources to test

• Because it is very expensive to do these tests

• Because many organisms that cause disease are still unknown

• Because most food poisonings are self limited, only last 1-3 days, and rarely cause death

Which causative agent(s) are commonly spread by chickens and other poultry?

• Giardia lambia

• Helicobacter pylori

• Salmonella spp.

• Camplobacter jujnii

Which causative agent is known to cause stomach ulcers?

• Giardia lambia

• Helicobacter pylori

• Salmonella spp.

• Camplobacter jujnii

Which enterobacteraciae family member produces a toxin that damages the mucosa and vili of the intestines?

• Shigella

• Salmonella

• Proteus

• Enterobacter

You have a pound of this bacteria in your gut and its needed to produce vitamin K, but sometimes this bacteria can become pathogenic when it gains the genes to do so from other pathogens. What is this bacteria?

• Salmonella typhi

• Shigella

• E. coli

• Campylobacter