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8 sie 2023 · S. pneumonia is a lancet-shaped, gram-positive, facultative anaerobic organism that typically occurs in pairs or short chains. Encapsulated S. pneumonia is pathogenic for humans, and the capsular polysaccharide is the basis for which the organism is classified.
Streptococcus pneumoniae is mentioned at gram stain near top right, and again in the alpha-hemolytic workflow in lower left quadrant. Diagnosis is generally made based on clinical suspicion along with a positive culture from a sample from virtually any place in the body.
This image is a light micrograph of Gram-stained S. pneumoniae (also known as S. pneumococcus), rounded bacteria (cocci) that usually occur in pairs and sometimes short chains. Their blue color indicates they are Gram-positive. Magnification is 1450X when printed 10-cm wide.
Streptococcus pneumoniae in Gram Staining. Bacterial pneumonia: Most common bacterial cause, especially in infants and the elderly. Pneumococci in alveoli stimulate the release of fluid, red and white cells producing “rusty sputum.”
Abstract. 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.
S.pneumoniae can also be distinguished based on its sensitivity to lysis by bile. The encapsulated, gram-positive coccoid bacteria have a distinctive morphology on gram stain , the so-called, " lancet shape ".
Streptococcus pneumoniae, or the pneumococcus (see Fig. 14.4.1 14.4. 1), is a lancet-shaped (pointed like a lance) Gram-positive coccus 0.6-1.2 µm in diameter. They typically appear as a diplococcus, but occasionally appear singularly or in short chains.
