Abstract
Adenovirus-free mongrel dogs, whelped and caged in isolation rooms, were infected with canine adenovirus. At intervals thereafter, Escherichia coli was instilled in the urinary bladder. Of 25 dogs infected with canine adenovirus, 17 developed urinary tract infection and 12 pyelonephritis caused by E. coli. Of 18 dogs receiving injections of control materials, none developed E. coli infection. These findings, as well as previously reported experiments indicating that murine adenovirus infection reduced the resistance of the mouse kidney to infection with E. coli, suggest that human adenovirus may decrease the resistance of the human urinary tract to E. coli infection.

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