If you are trying to identify culture of staphylococcus aureus from other genera
ID: 86608 • Letter: I
Question
If you are trying to identify culture of staphylococcus aureus from other genera of Staphylococci. what media would you select? Nutrient agar Trypticase soy agar (TSA) Eosin methylene blue (EMB) Mannitol salt agar (MSA) An example of a facultative anaerobe is: Streptococcus Escherichia coli Clostridium Helictobacter pylori If you grew a culture of mixed organisms that have different O_2 requirements, use the picture below to illustrate where and how you would find bacterial growth. Aerotolerant Faculatative obligate Anaerobe Obligate Aerobe What is the function of bacterial bacterial exoenzymes? To aid in pathogenicity Helps the bacterial cell attach to the host To degrade large macromolecules into smaller units for bacterial cell metabolism To help the bacteria surround and engulf food by phagocytosis Which of these test reactions produce alkaline end products?Explanation / Answer
8) D) Mannitol salt agar
Staphylococcus aureus ferments mannitol forming yellow colonies while other staphylococcus species do not ferment mannitol
9) A) Streptococcus and B) Escherichia coli
10) A) Aerotolerant : These bacteria do not require oxygen and disperse themselves equally throughout the medium (13)
11) B) Facultative aerobes: They can grow either in the presence or in the absence of oxygen, hence they disperse them throughout the tube. But they gather themselves at the top of the tube where the oxygen is high, as they get more ATP aerobically than anaerobically or by fermentation (12).
12) C) Obligate anaerobe : Obligate anaerobes are poisoned by oxygen and hence gather at the bottom of the tube were the oxygen level is low (11)
13) D) Obligate aerobe - Obligate aerobes need oxygen so they gather at the top of the tube where the oxygen level is high (10)
14) C. To degrade large macromolecules into smaller units for bacterial cell metabolism.
15)
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