A comprehensive review study on pneumococcal pneumonia and its association with global mortality and morbidity

Abstract

Gram-positive, arrowhead (lancet) shaped cells arranged in pairs and short chains. Some pneumococci are encapsulated with complex polysaccharides. Encapsulated organisms are pathogenic, while pneumococci without capsular polysaccharides are not pathogenic. 2 Pneumococcus may cause different diseases at different places, including ear infections and meningitis (Figure 1). 2