Bacti back to basics

• Gram (+) cocci

  • Staphylococcus spp.
  • Micrococcus spp.
  • Streptococcus spp.
  • Enterococcus spp.
• Staphylococcus spp.

  • Catalase (+)
  • Facultative Anaerobe
  • Bacitracin: Resistant
  • Lysosome: Resistant
  • Lysostaphin: Resistant
  • Furazolidone: Sensitive
• Micrococcus spp.

  • Obligate Aerobe
  • Modified Oxidase Test/Microdase (+) - Blue
  • Bacitracin: Sensitive
  • Lysosome: Sensitive
  • Lysostaphin: Sensitive
  • Furazolidone: Resistant
• Facultative Anaerobe Micrococci

  • M. kristinae
  • M. viridans
• Streptococcus spp.


  • Catalase (-)
• Enterococcus spp.


  • Gram (+) diplococci
• Gram (-) diplococci

  • Neisseria & Moraxella
• Neisseria & Moraxella


  • Catalase (+) and Oxidase (+)
  • Except N. elongata & N. bacilliformis
  • Fastidious (iron)
• Moraxella


  • Asaccharolytic
  • DNase (+)
  • Butyrate esterase (+)
• Gram (-) bacilli

  • Enterobacteriaceae
  • Vibrio, Aeromonas, Pleisomonas
• Enterobacteriaceae

  • Oxidase (-)
• Vibrio, Aeromonas, Pleisomonas

  • Oxidase (+)
  • Curved
  • GIT infections
• NFG (-) bacilli

  • Fastidious Anaerobes (FA)
  • Campylobacter, Helicobacter
  • Nonfermenters
• Fastidious Anaerobes (FA)

  • Microaerophile
  • Oxidizers (+)
  • Asaccharolytic
• Campylobacter, Helicobacter

  • Fastidious (X & V factors)