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Questions and Answers
Which of the following is true about Escherichia coli?
Which of the following is true about Escherichia coli?
- It is Gram positive and non-motile.
- It is Gram negative and non-sporing. (correct)
- It forms capsules.
- It does not grow on MacConkey agar.
What characteristic do Pseudomonads lack?
What characteristic do Pseudomonads lack?
- They ferment sugars. (correct)
- They can live in various environments.
- They are Gram negative.
- They are motile.
How many biotypes does Vibrio cholerae have?
How many biotypes does Vibrio cholerae have?
- One
- Two (correct)
- Three
- Four
Which statement about Klebsiella is incorrect?
Which statement about Klebsiella is incorrect?
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What is true about Strep. Viridans?
What is true about Strep. Viridans?
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Study Notes
Bacterial Characteristics
- Vibrio cholerae: Has two biotypes, but not (H) and (F) antigens.
Bacteriods
- Gram negative, non-sporing, and catalase positive, but not motile.
Pseudomonads
- Can adapt to live in various environments, but do not ferment sugars.
Brucella
- There are not five types of Brucella.
Escherichia coli
- Gram negative, motile, and non-sporing, and some strains can form capsules.
Strep. Viridans
- Lancet-shaped, non-capsulated, sensitive to optochin, and bile soluble.
E. coli on MacConky Agar
- Forms colonies with a red-pinkish color, but not due to formic.
Klebsiella Colonies
- Mucoid colonies, but not due to swarming.
Antibiotics
- Penicillins and cephalosporins do not have a six-membered dihydrothiazin ring.
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