Bacterial Pathogens of the Urinary Tract

Infections of the genitourinary tract are usually caused by a single organism. In around 20% of cases, however, two or more bacteria species are involved.

The majority of infections is caused by aerobic bacteria of intestinal origin, gaining access to the bladder via the urethra. E. coli is by far the organism most commonly isolated from the urinary tract of dogs and cats, but other pathogens, such as Staphylococcus spp., Proteus, Klebsiella and Pseudomonas, are involved as well (18).

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