streptococcus pneumoniae bacteria

antibiotic antimicrobial bacteria bacterium bronchitis cell cellulitis closeup cold contamination danger disease endocarditis gram health healthcare highscale human illness illustration immunization infection infections intestine medicine micro microaerophilic microbe microbial microbiology microorganisms otitis pandemic pathogenic pericarditis peritonitis pneumococcal pneumococcus pneumonia pneumoniae positive render sepsis streptococcus unhygienic