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Ch. 22
Medical Microbiology
20
Biology
Undergraduate 2
04/30/2013

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Cards

Term
What are some natural defenses of the gastrointestinal system?
Definition
Mucus, HCl, Bile acids, Digestive Enzymes, GALT tissues (tonsils, appendix, adenoids), IgA
Term
Which areas of the gastrointestinal system have the highest numbers of normal biota?
Definition
Mouth and intestines
Term
Name a microbe that is responsible for dental caries.
Definition
Streptococcus mutans
Term
What events happen in the oral cavity that lead to the formation of dental caries?
Definition
Makes sticky polymers:Glucan or Fructan
Acid leaches calcium
Term
What kind of organisms cause gingivitis (anaerobes or aerobes)?
Definition
Anaerobes
Term
What microorganism is associated with stomach ailments?
Definition
Helicobacter pylori
Term
Be able to name a pathogenic bacterial microbe of the intestinal tract and explain how it causes disease.
Definition
Clostridium difficile
able to super infect the large intestine when drugs have disrupted the normal biota.
Term
What organism causes intestinal diarrhea by producing toxins?
Definition
Staphylococcus aureus
Term
What condition lead to cholera infection?
Definition
Contaminated water
Term
What are the severe symptoms of cholera that make it so dangerous?
Definition
Severe dehydration
Rice-water stool
Term
What age group does the rotavirus usually affect?
Definition
Children
Term
What age group does the norovirus usually affect?
Definition
Adults
Term
What protozoa can cause diarrhea?
Definition
Giardia
Term
How is Hepatitis A transmitted?
Definition
Ingestion
Term
Does Hepatitis A cause cancer?
Definition
No
Term
How is Hepatitis B transmitted?
Definition
Blood, semen, vaginal fluids
Term
How can Hepatitis B be prevented?
Definition
Vaccine
Term
How is Hepatitis C transmitted?
Definition
Blood
Term
Does Hepatitis C cause cancer?
Definition
Yes
Term
Why is there no vaccine for Hepatitis C?
Definition
Virus mutates frequently
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