'Swollen"capsule Cell body igure 18.20 A positive Quellung, or capsular swellin precipitins, is confirmatory for S. pneumo identify the precise capsular serotype. TI lwith the capsular polysaccharide intensif 肺炎链球菌 Figure 18.18 The coune of bacterial pneumonia. As the pneumococcus traces a pathway down the repiratory tree, it provoke intime intlammanon and exudate fomation. The blocking of the bronchioles and alveoli by consolidation of inflammatory cells and products s evident肺炎链球菌