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Bacterial Identification

Bacterial Identification. 1. E. Coli. Gram negative rods Harmless but a few are pathogenic Strains 0157:H7 causes food illnesses Normal bacterial flora in lower intestines of warm blooded animals. Sarcina aurantiaca. Orange pigments Gram + Anaerobic Appears in cuboidal masses

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Bacterial Identification

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  1. Bacterial Identification

  2. 1. E. Coli

  3. Gram negative rods • Harmless but a few are pathogenic • Strains 0157:H7 causes food illnesses • Normal bacterial flora in lower intestines of warm blooded animals

  4. Sarcinaaurantiaca • Orange pigments • Gram + • Anaerobic • Appears in cuboidal masses • Usually harmless • Found in air and water

  5. Bacillus subtilis • Gram + obligate aerobe • Tough endospores • Can contaminate food, but rare to cause illness • Enzymes used in laundry detergent • Natural fungicide

  6. Micrococcus roseus • Gram + • Skin: transforms compounds in sweat into compounds with an unpleasant odor • animal and dairy products, and beer. • water, dust, and soil.

  7. Bacillus megaterium • Gram + rods • Endospores • Found in soil/forms spores • Used to produce penicillin amidase

  8. Micrococcus luteus • Gram + cocci • Normal flora of upper RT and mouth • Mammal skin • Opportunistic pathogen

  9. Staphylococcus epidermis • Gram + diplococci • Catalase + • Opportunistic pathogen • Harbor around plastic medical equip: heart valves, catheters, IVs

  10. Streptomycesviolaceus A model organism • Gram + rods • Produces violet pigments • New research: antibacteria and antiviral activities

  11. Serratiamarcescens D1 • Gram – rods • Human pathogen of Respiratory and UT • UTI and catheter infections • Produces red pigment: prodigiosin • Found in restrooms; grows well in tile grout and shower curtains

  12. Streptococcus lacti YUM! • Gram + cocci in short chains • Production of buttermilk, cheese (brie, camembert, colby)

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