A comparison of serum bactericidal activity and phenotypic characteristics of bacteremic, pneumonia-causing strains, and colonizing strains of Branhamella catarrhalis.

Abstract excerpt

Four blood isolates, 12 pneumonia isolates, and seven colonizing isolates of Branhamella catarrhalis were compared with respect to their ability to grow in normal human serum and in convalescent serum of a patient with B. catarrhalis bacteremia. Disease-causing isolates showed seven of 16 serum-resistant strains (43 percent) compared with one of seven (13 percent) colonizing strains. Bacteremic strains were not...

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