Pyelonephritis with the colon bacillus as the infecting agent following attempts at coition, especially in newly married women, probably occurs with greater frequency than the scant literature of the subject would indicate.
In 1897, in a comprehensive clinical and experimental review of infection of the urinary tract, Rovsing1 reported three cases of young women, recently married, who immediately after tentative coitus had frequency, dysuria and pain in the renal area. The colon bacillus was isolated from the urine in all cases. Wildbolz, 2 in 1912, also called attention to cases of colon bacillus pyelitis occurring in newly married women which he attributed to an ascending infection starting from small wounds consecutive to rupture of the hymen. Sippel, 3 writing in the same year, says that he frequently observed similar cases, many of which are transient, being either overlooked or made evident only by symptoms of cystitis. Braasch4 has