Which of the morphological and tinctorial properties are characterized of staphylococci?
C.
Gram-positive
D.
grapelike clusters
F.
having thick cell wall
Vibrio genus involves many species, only some serotypes of V.cholerae are pathogens of cholera. Which of the following causative agents of cholera?
V.cholerae serogroups non O1 and non O139
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