March 2012
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February 2012
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bacteriology tree
Gram +: PG is blue from crystal violet stain + stain-sealing iodine, not washed away by acetone
Cocci:
Catalase+: breaks down H2O2
Staphylococcus: grape-like clusters
Coagulase+:
Staph. aureus (beta hemolytic, yellow on mannitol salt agar; protein A inhib. phagocytosis by binding Ig Fc and destroys GI epithelium’s ability to regulate...
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The biggest photo of the night sky ever taken –... →