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Microbiology Lab Test 2
Southern Adventist University - Dr. Trott's Micro Lab Test 2 Questions
8
Microbiology
Undergraduate 2
03/08/2012

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Term
[image]
Definition
Streptococcus mitis
(Pertains to all of 14.1)
Term
14.1.1
What is the normal habitat of this (Streptocuccus mitis) bacterium?
Definition
Streptococcus mitis is part of the normal flora of the throat
Term
14.1.2
What type of hemolysis does it (Streptococcus mitis) produce on blood agar?
Definition
It produces Alpha hemolysis (incomplete greenish zone) on blood agar.
Term
14.1.3
How can it (Streptococcus mitis) be differentiated from Streptococcus pneumonia?
Definition
By the fact that Streptococcus mitis is NOT inhibited by Optochin when a disk containing that chemical is placed on the culture plate immediately after inoculation. Streptococcus pneumonia is susceptible to (and inhibited by) Optochin.
Term
[image]
Definition
Pertains to all of 14.2
Term
14.2.1
Describe the gram reaction and morphology of the bacteria at the tip of the pointer on the previous slide
Definition
Gram positive cocci in chains
Term
14.2.2
What genus of bacterium is this?
Definition
Streptococcus
Term
14.2.3
What species of this bacterium is most virulent? Name some diseases caused by this species
Definition
Streptococcus pyogenes, strep throat, scarlet fever, etc.
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