CRP and urinary tract infection: Abnormal respiratory examination, pulmonary infiltrates on chest radiographs. Cough that is productive of purulent sputum, microbiological cultures from the lower respiratory tract or blood cultures, leukocytosis, and a rise in C reactive protein. Diagnosis of urinary tract infection was based on two of the following criteria: fever (>38°C), urine sample positive for nitrite, leukocytes in urine, and significant bacteriuria.