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Green alpha hemolytic streptococcus(possibly s.pneumoniae) on blood plates(aerobic&anaerobic). Choc plate looks yellowish. No growth on macconkey.

""Streptococcus pneumoniae" alpha hemolysis on blood agar plate. Note the partial hemolysis accompanied by a greenish discolorization of the agar around the growth and the mucoid, transluscent colonies of the pneumococcus."

Samples of Alpha, Beta and Gamma Hemolysis ocurring on Blood Agar Plate

Streak plate of Streptococcus pyogenes (incubated @ 37 degrees C for 48 hrs) showing beta hemolysis, complete lysis of red blood cells, around the isolated colonies. Image taken using transmitted light.

S.saprophyticus, alpha hemolysis on blood plate. Pale small colonies on macconkey.

CNS;coagulase negative staphyloccocus. Can be s.epidermidis or S.saprophyticus. Small white non-hemolytic colonies on blood plate and small red colonies on macconkey. also grows on choc.

Beta hemolytic streptokok group F (milleri)

Bacteria ~ Each distinct circular colony should represent an individual bacterial cell or group that has divided repeatedly. Being kept in one place, the resulting cells have accumulated to form a visible patch. Most bacterial colonies appear white, cream, or yellow in color, and fairly circular in shape. Photo Bacteria Streptococcus pyogenes (6)

Candida albicans and Pseudomonas aeruginosa. Blood agar culture of sputum from patient with pneumonia. Compromised host. Colonies of Candida albicans and Pseudomonas aeruginosa. Note hemolysis around colonies of Pseudomas aeruginosa and colony morphology.