Which of the following organism is a gram-positive bacteria?
Escherichia
Shigella
Salmonella
Streptococcus
A
Escherichia
B
Streptococcus
C
Shigella
D
Salmonella
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Solution
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The Gram-positive bacteria can retain the crystal violet stain and appears purple or blue. It includes staphylococci, streptococci, pneumococci, and the bacterium responsible for diphtheria (Corynebacterium diphtheriae) and anthrax (Bacillus anthracis).
So, the correct answer is option A.
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