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8 sie 2023 · Streptococcus pneumoniae is a gram-positive, lancet-shaped bacterium and a cause of community-acquired pneumonia. Pneumococcal infections are present throughout the world and are most prevalent during the winter and early spring months.
Learn about S. pneumoniae, a common human pathogen that causes pneumonia, meningitis, and other infections. See its morphology, capsule, genetics, and history on Gram stain.
Learn about pneumococci, gram-positive, alpha-hemolytic, encapsulated diplococci that cause otitis media, pneumonia, sepsis, meningitis, and death. Diagnosis is by Gram stain and culture, and treatment depends on resistance profile.
See a light micrograph of Gram-stained S. pneumoniae, a type of bacteria that causes pneumonia and other infections. Learn about their appearance, color, and shape in this image from MSD Manual Professional Edition.
Streptococcus pneumoniae is both an aggressive pathogen and a normal part of the human respiratory microbiome. Clinicians and microbiologists have struggled to develop tests that can identify pneumococcal respiratory infection and accurately distinguish colonization from invasive disease.
Learn about the Gram-positive cocci that causes pneumonia, meningitis, and other infections. Find out how to identify them by Gram staining, biochemical tests, and serological tests.
Streptococcus pneumoniae grows well on 5% sheep blood agar or brain–heart infusion broth. Identification can be made from appearance with Gram stain, sensitivity to optochin, and characteristic α hemolysis on blood agar.
