The diagnosis of pyelitis (non-calculous and nontuberculous) appears forty-seven times in the histories of 2,500 private patients examined by me during the past five years, an incidence of approximately 2 per cent. Of these forty-seven patients, twenty-one had been treated for malaria.
In most cases of infection of the pelvis of the kidney constitutional symptoms arise that may closely simulate malarialfever. About one-half of the cases present local signs on the part of the kidney or bladder, or urinary disturbances manifest themselves in such a way as to direct attention to the existing lesion. In the other 50 per cent, of the cases, however, neither the history of the illness nor a thorough physical examination reveal any clues suggestive of an infection of the genito-urinary tract. As a result, pyelitis may remain unrecognized for long periods of time. Furthermore, the insidious onset without pain or local symptoms, the characteristic intermittent