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Updated: Aug 19, 2026

Capsular Serotyping of Streptococcus pneumoniae by Latex Agglutination
Published on: September 25, 2014
[Differentiation of serologic group A streptococci from group C and G using disks with various bacitracin levels]
P Urbásková1, J Motlová, O Benes
1Centrum epidemiologie a mikrobiologie, Státní zdravotní ústav, Praha.
Abstract:
It was revealed that a diameter of the inhibition zone of 10 mm or more surrounding a disk with 0.04 U bacitracin differentiates reliably strains of the serological group A form strains of group C and G with the exception of 7.3% strains of group C and G with a high susceptibility for bacitracin. The disks with a higher bacitracin content gives less reliable results.
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