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. 2009 May 15:332–355. doi: 10.1016/B0-72-168903-5/50020-3

TABLE 15-2.

Normal Bacterial Flora at Various Sites in Dogs and Cats

  • Integument

  • Skin
    • (L1)Aerobes
      • (L2)Micrococcus spp.
      • Staphylococcus spp.
      • Streptococcus spp.
      • Gram-negative rods including Pasteurella spp.
      • Diphtheroids(/L2)
    • Anaerobes
      • (L2)Clostridium spp.(/L2)
    • Ear
      • (L1)Aerobes
        • (L2)Staphylococcus spp.
        • Corynebacterium spp.
        • Streptococcus spp.
        • Coliforms
        • Bacillus spp.(/L2)
      • Yeast
        • (L2)Malassezia spp.(/L2)
      • Respiratory System
    • Nasal Cavity, Pharynx
      • (L1)Aerobes
        • (L2)Staphylococcus spp.
        • Streptococcus spp.
        • Neisseria spp.
        • Corynebacterium spp.
        • Escherichia coli
        • Lactobacillus spp.
        • Proteus spp.(/L2)
      • Anaerobes
        • (L2)Clostridium spp.
        • Bifidobacterium spp.
        • Propionibacterium spp.
        • Fusobacterium spp.
        • Bacteroides spp.(/L2)
      • Trachea
        • (L2)Streptococcus spp.
        • Staphylococcus spp.
        • Pasteurella spp.
        • Klebsiella spp.
        • Corynebacterium spp.(/L2)(/L1)
      • Eyes
    • Cornea and Conjunctiva
      • (L1)Aerobes
        • (L2)Staphylococcus spp. (coagulase positive and negative)
        • Nonhemolytic, alpha- and beta-hemolytic streptococci
        • Bacillus spp.
        • Pseudomonas spp.
        • E. coli
        • Corynebacterium spp.
        • Neisseria spp.
        • Moraxella spp.(/L2)(/L1)
      • Gastrointestinal Tract
    • Oral Cavity and Feces
      • (L1)Aerobic
        • (L2)Gram + Streptococcus spp.
        • Staphylococcus spp.
        • Bacillus spp.
        • Corynebacterium spp.
        • Gram - Enterobacteriaceae (especially E. coli, Enterobacter spp., Proteus spp., and Klebsiella spp.)
        • Pseudomonas spp.
        • Neisseria spp.
        • Moraxella spp.(/L2)(/L1)
      • (L1)Anaerobic
        • (L2)Gram + Clostridium spp.
        • Lactobacillus spp.
        • Propionibacterium spp.
        • Bifidobacterium spp.
        • Gram - Bacteroides spp.
        • Fusobacterium spp.
        • Veillonella spp.
        • Other Spirochetes
        • Mycoplasma spp.
        • Yeasts(/L2)(/L1)
      • Genitourinary Tract
    • Distal Urethra and Prepuce
      • (L2)Gram + S. aureus
      • S. epidermidis
      • Streptococcus spp.
      • Mycoplasma spp.
      • Bacillus spp.
      • Corynebacterium spp.
      • Gram - Flavobacterium spp.
      • Haemophilus spp.
      • Moraxella spp.
      • Pasteurella spp.
      • Klebsiella spp.(/L2)

Data compiled from Greene CE, editor: Clinical microbiology and infectious diseases of the dog and cat, Philadelphia, 1998, WB Saunders. (source)