Epiglottitis, a severe life-threatening infection occurring in non-vaccinated infants and children, is most commonly caused by
A) a gram-negative coccobacillus that is best identified by a rise in antibody titer in serum samples drawn two weeks apart.
B) a pleomorphic gram-negative coccobacillus that requires X and V factors and is horse blood agar negative.
C) a gram-negative coccobacillus that is identified by direct fluorescent antibody and slide agglutination tests.
D) a pleomorphic gram-negative coccobacillus that is ALA positive and horse blood agar positive.
B
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