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Bacteria under Microscope
Streptococcus pneumoniae
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Gram-stain: |
Gram-positive cocci |
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Microscopic appearance: |
Lanceolate (ovoid) cocci in short chains, diplococci and single cocci |
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Clinical significance: |
- Despite the name, the organism causes many types of pneumococcal infections other than pneumonia.
- Acute sinusitis
- Otitis media
- Meningitis
- Bacteremia
- Sepsis
- Osteomyelitis
- Septic arthritis
- Endocarditis
- Peritonitis
- Pericarditis
- Cellulitis
- Brain abscess
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Text: Wikipedia |
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Colony morphology: |
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A |
B |
C |
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| Streptococcus pneumoniae identification |
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A |
Alpha-hemolytic colonies of Streptococcus pneumoniae on sheep blood agar. Cultivation 24 hours in an aerobic atmosphere enriched with 5% CO2, 37°C. |
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B |
Craterlike appearance of colonies of Streptococcus pneumoniae. Cultivated on Columbia agar with sheep blood, 24 hours in an aerobic atmosphere enriched with 5% carbon dioxide., 37°C. |
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C |
Virulent, encapsulated form of Streptococcus pneumoniae. Cultivated on Columbia agar with 5% defibrinated sheep blood, 48 hours in an aerobic atmosphere enriched with 5% carbon dioxide, 37°C.
Colonies are surrounded by a zone of alpha-hemolysis. |
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www.bacteriainphotos.com |
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