Swarming growth on Blood Agar

Swarming or spreading in wave form is seen with motile organisms particularly Proteus mirabilis. Cause of swarming – The flagella of bacteria are naturally set to spin counter-clockwise ...
1031Pseudomonas aeruginosa on blood agar

Pseudomonas aeruginosa on blood agar

Pseudomonas aeruginosa, an increasingly prevalent opportunistic human pathogen, is the most common Gram-negative bacterium found in nosocomial, or hospital-acquired infections. This ...

Haemophilus influenzae diagnosis using Satellite Test

  Haemophilus spp does not grow on 5% Sheep Blood Agar, which contains hemin (factor X) but lacks NAD (factor V). Haemophilus influenzae will grow in the hemolytic zone of ...

Culture media for the isolation of pathogenic Bacteria

Colonies of Staphylococcus aureus on blood agar surrounded by wide zones of beta-hemolysis.

Colonies of Staphylococcus aureus on blood agar

Colonies of Staphylococcus aureus on blood agar surrounded by wide zones of beta-hemolysis.

Different types of bacterial hemolysis on blood agar

  Different types of bacterial hemolysis on blood agar : Staphylococcus – Hemolysis. A=Beta Hemolysis B=Alpha Hemolysis C=Gamma Hemolysis        
Klebsiella pneuomoniae mucus colonies

Gram-negative Bacilli of Klebsiella pneumoniae

Klebsiella pneumoniae is a Gram-negative, non-motile, encapsulated, lactose fermenting, facultative anaerobic, rod shaped bacterium found in the normal flora of the mouth, skin, and ...
Streptococcus pneumoniae and viridans colonies

Streptococcus pneumoniae colonies

Streptococcus pneumoniae colonies have a flattened and depressed center after 24-48 hours of growth on Blood Agar, whereas the viridans streptococci retain a raised center
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