Working of antimicrobial agents
1) Describe the four basic methods in which antimicrobial agents work.
2) Explain the purpose of an enzyme. Enzymes can function in two different locations with respect to the cell. what are the two types or two locations? which type is amylase?
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If urine is normally sterile within the urinary bladder, describe the two ways in which urine may become contaminated when obtaining a urine culture.
Explain what is meant by "indicator" organisms when testing a water sample. What are the media used to determine the presence of the indicator organisms?
1) Why did bacteria such as Streptomyces species evolve toxins against other bacteria? 2) Explain Streptomyces bacterial colonies.
What energy systems are responsible for living organisms acquiring energy and transforming energy into other forms? How do these systems work and how do they relate to the structures in the Prokaryotic cells and Eukaryotic cells?
Describe the four basic methods in which antimicrobial agents work.
Explain the principle and advantage of using a rapid identification system, such as the Enterotube. How would you rate the Enterotube system with conventional bacteriological procedures to identify members of the Enterobacteriaceae family? Why?
Describe why it is very important to have a pure culture and not a mixed culture when performing biochemical tests.
In the year 1884, Hans Christian Gram explained a method of staining bacterial cells while not staining surrounding animal tissues; though, he thought the staining method he developed was faulty because not all bacteria stained
Compare and contrast gram-positive and gram-negative cell walls with regard to: (a) sensitivity to antimicrobial agents (b) resistance to phagocytosis (c) chemical composition (d) decolorization by alcohol
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