2017-09-06
PNEUMONIA: pneumonia is an inflammatory condition of the lungs affecting primarily the microscopic air sac called AVIOLI. Pneumonia affect approximately
STREPTOCOCCUS PYOGENES ON COLOMBIA HORSE BLOOD AGAR MEDIUM. In liquid culture media like peptone water and Nutrient broth or Glucose broth, the growth of the bacterium occurs as granular turbidity with a powdery deposit which is due to the heavy bacterial chains that settle down and appears as a powdery deposit which is further analyzed for the morphology (under the microscope), gram reaction Streptococcus pneumoniae can also develop antibiotic resistance by the timeless process of mutation and selection. The bacterium has a relatively fast growth rate and achieves large cell densities in an infectious setting, These conditions not only favor the occurrence natural transformation but also the emergence of spontaneous mutants resistant to the antibiotic. Biochemical Test and Identification of Streptococcus pneumoniae. They are gram +ve, catalase -ve, oxidase -ve, non-sporing, diplococci bacteria. Streptococcus Pneumoniae also referred to as pneumococcus is responsible for the maximum types of pneumonia in human beings.
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What is the morphology of Streptococcus pneumoniae? Streptococcus pneumoniae cells are Gram-positive, lancet-shaped cocci (elongated cocci with a slightly pointed outer curvature). Usually, they are seen as pairs of cocci (diplococci), but they may also occur singly and in short chains. When cultured on blood agar, they are alpha hemolytic. Streptococcus pneumoniae is a Gram positive cocci, typically lancet shaped and occurs singly, in pairs (diplococci) or in short chains.. Streptococcus pneumoniae in Gram Staining. Main diseases caused by Streptococcus pneumoniae:.
Most strains produce a clear broad zone of hemolysis on blood agar. Micromorphology: Large (1 x 5-10 µm) motile rods, centrally located endospores can
Among the causative agents of these diseases is the Gram-positive bacteria Streptococcus pneumoniae, the leading cause of bacterial pneumonia [2]. Besides An untoward result of widespread vaccination has been the appearance of new strains that are not contained in the vaccine; these are called replacement strains . Streptococcus pneumoniae undergoes spontaneous, reversible phenotypic variation, variation, which is readily visualized as differences in colony morphology.
MORPHOLOGY OF STREPTOCOCCUS PNEUMONIAE (PNEUMOCOCCUS) Shape – Streptococcus pneumoniae is an elongated round shape (coccus) bacterium with one end broad or rounded and the other end is pointed (flame shape or lanceolate appearance). Size – The size of Streptococcus pneumoniae is about 1 mm (micrometer).
pneumoniae are colony morphology, optochin susceptibility and bile solubility.
Encapsulated, spherical, ovoid, lancet-shaped cocci 2.
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They are gram +ve, catalase -ve, oxidase -ve, non-sporing, diplococci bacteria. Streptococcus Pneumoniae also referred to as pneumococcus is responsible for the maximum types of pneumonia in human beings. The infection that this bacterium causes could be dangerous and could pave way for a variety of life-threatening diseases. 2021-02-04 · Virulence factors, Pathogenesis and Clinical manifestations of Streptococcus pneumoniae. S. pneumoniae colonizes the oropharynx by adhering to the epithelial cells of pharynx.
Streptococci are coccoid bacterial cells microscopically, and stain purple (Gram-positive) when Gram staining technique is applied.
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2021-02-04 · Morphology of Streptococcus pneumoniae They are gram positive bacteria. May lose gram +ve character in older cultures and appear gram –ve. They are non-sporing and non-motile bacteria. May have pili for adherence. They are 0.5 x 1.25 µm in diameter. They are mostly found in pairs (diplococci). Also
It is usually cultured on media that contain blood, but can also grow on a chocolate agar plate (CAP). On a blood agar plate (BAP), colonies of S. pneumoniae Alpha-hemolytic colonies of Streptococcus pneumoniae on sheep blood agar. Cultivation 24 hours in an aerobic atmosphere enriched with 5% CO 2, 37°C. B: Craterlike appearance of colonies of Streptococcus pneumoniae.