Microbiology Quiz 3 (BIO 210)

ULCERS. Week 3, Quiz 3

Match the microbiologist with their contribution.

==PASTEUR:== Showed that microbes come from other microbes, not from non-living materials

==KOCH:== Developed a method to show that a specific microbe causes a disease

==PASTEUR:== Developed a method used even today to get rid of microbes in food and drink

==SEMMELWEISS:== Showed that handwashing between patients prevents transmission of pathogens

Average handwashing compliance in U.S. hospitals prior to the pandemic was around 90%.

FALSE

Which ==experimental design== would test the hypothesis that "Excess stomach acid cause ulcers"? You need to measure the number of ulcers per person in order to determine if antacid has an effect on the formation of ulcers. You also need to have a control group that did not get the treatment (antacid).

Give half the participants antacids and half the participants a sugar pill then measure the number of ulcers per person.

Put the steps of ==Koch's postulates== in the correct order

1. Observe pathogen in only diseased and not healthy animals
2. Isolate pathogen from diseased animal in vitro
3. Introduce isolated pathogen into a healthy test animal and show that it develops disease
4. Re-isolate pathogen from the diseased test animal

Which of the following statements are true?

H. pylori is disappearing from Westernized populations compared to earlier generations

H. pylori can survive in stomach acid

Barry Marshall drank a flask of H. pylori and gave himself an ulcer

H. pylori has only recently been found in human populations

The lack of H. pylori can cause other diseases

If you wanted to test the hypothesis that "athletes who take probiotics have better endurance" , what would be a good control for your study?

athletes of the same age who are given a sugar pill