HSS 1100 Lecture Notes - Lecture 3: Bunsen Burner, Gram Staining, Stool Test

• School: University of Ottawa
• Department: Health Sciences
• Course: HSS 1100
• Professor: William Yan

Document Summary

Diagnostic microbiology: looking for clues for what is or is not the suspect you are looking for; trial and error. If you test blood and you find something growing on it, you can find what it is pretty easily and you can find the culprit of the disease because blood is suppose to be sterile. You know exactly the level of all nutrient in it and it is controlled. Way more expensive: chemically undefined medium; blood agar plates (blood is the nutrient supplied to the bacteria. Chemically undefined because you cannot find two blood plates the same, different animals have different levels of stuff and nutrients in the blood. They need something for the virus to infect; very infected, hard to come by, easily contaminated. If you put gram on a plate, this will not have that much of an effect and will allow this bacterium to grow well (selects for)