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Bacteria

This quite large picture shows all the different shapes pretty well.

Gram Positive

Cocci

Bacilli

  • Corynebacterium – non-sporing, facultative anaerobe
  • Listeria – non-sporing, aerobic (or microaerophilic)
  • Lactobacillus – non-sporing, anaerobic (or microaerophilic)
  • Propionibacterium – non-sporing, anaerobic

Gram Negative

Cocci

Bacilli

Comma-shaped

  • Vibrios – facultative anaerobes (vibrio, campylobacter, helicobacter)

Spirochaetes

Acid-fast bacilli

Cell-wall deficient bacteria