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Updated: Jan 31, 2026

Capsular Serotyping of Streptococcus pneumoniae Using the Quellung Reaction
Published on: February 24, 2014
Pulmonary Disease Associated With Nonencapsulated Streptococcus pneumoniae
Caleb S Martin1, Jessica L Bradshaw1, Haley R Pipkins1
1Department of Microbiology and Immunology, University of Mississippi Medical Center, Jackson, Mississippi.
Abstract:
We discuss 3 patients presenting with pneumonia associated with nonencapsulated Streptococcus pneumoniae (NESp), an emerging pathogen commonly causing upper respiratory infections. Clinical isolates obtained from these patients were characterized to evaluate their respective antibiotic resistance and virulence mechanisms. We demonstrate that NESp resistant to classical drug treatments are isolated during pneumonia.
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