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. 1990 Jan-Feb;13(1):63-6.
doi: 10.1016/0732-8893(90)90056-2.

Optochin-resistant variants of Streptococcus pneumoniae

R Muñoz  1 , A Fenoll, D Vicioso, J Casal
Affiliations

Optochin-resistant variants of Streptococcus pneumoniae

R Muñoz et al. Diagn Microbiol Infect Dis. 1990 Jan-Feb.

Abstract

Ten Streptococcus pneumoniae clinical isolates, possessing physiologically typical pneumococcal characteristics, showed optochin-susceptible and optochin-resistant colonies around the optochin disk, when tested for optochin susceptibility. Equivocal optochin disk test results should be confirmed by bile solubility, agglutination tests, or both.

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