Homework Answers
54- (b) streptococcus pneumoniae
It is clearly shown in the picture that the colonies are note grown on the media because of its property of optichin sensetivity.
Streptococcus pneumonia is sensetivity to optichin, hence can't grow on the media.
Point - 1-Streptococcus pneumoniae is found commonly in human respiratory tract,
Point - 2- optochin (ethylhydrocupreine hydrochloride) is a chemical which is used in the identification of alpha-hemolytic Streptococcus pneumoniae, which is optochin sensitive. Other alpha-hemolytic Streptococcal species are resistant to it.
55- (A) alpha hemolysis
Streptococcus pneumoniae is alpha hemolytic gram posetive cocci, it is bole soluble, insulin fermentor & optichin sensetive.
It shows partial hemolysis or alpha hemolysis on sheep blood agar.
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Need help making my dichotomous key. The left side is
okay, it's the right side I need help with. What test could I use
to differentiate between Bm and Bs given this chart?
Bacillus mepoterum Dichotomous Key for Gram + Bacteria Bm), Bacilus subtils (Bs), Enterococcus faecalis (Ef!, Staphylococcus aureus (sa), Staphylococcus soprophyticus (ss), Streptococcus rails (so). Streptococcus pneumoniae (Spl, Streptococcus pyogenes (Sov) Inoculate unknown on CNA: Did hemolysis occur?? No. Gamma or na growth Yes, hemolysis occurred El, Ss....
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