Important Bacteria

Staphylococcus aureus

• Gram-positive

• coccus shape (round)

• standalone arrangement

• teichoic acids (because Gram-positive), no LPS

• cytoskeletal proteins: ????

Escherichia coli

• Gram-negative

• bacillus shape

• LPS, no teichoic acids

• cytoskeletal proteins: ???

• strains:

  • O157:H7

  • O26

  • O21

Bacillus anthracis

• Gram-positive

• bacillus shape

• spore maker

• teichoic acid

• cytoskeletal proteins: ???

Vibrio cholerae

• Gram-negative

• vibrio shape (comma)

• LPS ???

• cytoskeletal proteins: ???

Mycobacterium tuberculosis

• staining procedure: acid fast (because of mycolic acids !!!)

  • stain with carbol fuchsin and steam, rinse with acid-alcohol, stain with methylene blue. M. tuberculosis stains pink because acid-fast.

  • teichoic acid or LPS ???

  • cytoskeletal proteins: ???

Mycoplasma spp.

• staining: ???

• one of the smallest known bacteria

• intracellular

  • no cell wall of its own

  • itty bitty