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THE clinical diagnosis of pyelonephritis is frequently overlooked, and the disparity between the clinical and post-mortem findings in this infection has been emphasized repeatedly.1 2 3 4 The failure of clinical diagnosis has been due not so much to failure to recognize the classic symptoms and signs of the disease as to the absence of overt clinical manifestations of pyelonephritis in many patients.Bacterial counts of the urine have been performed in an attempt to add to the objective methods for determining the presence of infection of the urinary tract.3 , 5 6 7 The validity of the quantitative approach is suggested by the following considerations:Urine . . .
MacDonald et al. (1957) studied this question.