chains of streptococcus pneumoniae bacteria, significant pathogens causing pneumonia, meningitis, and other respiratory

streptococcus pneumoniae bacteria pneumonia pneumococcus diplococcus chain meningitis infection disease respiratory illness medical healthcare microorganism microbiology bacterium pathogen health biology microscopic streptococci gram positive otitis media sinusitis sepsis bacteremia tract ear sinus bloodstream immune system antibiotic resistance vaccine prevention treatment diagnosis symptom inflammation fever cough chest pain shortness breath