A man was brought into the admission room after an overexposure to cold. He complains of sharp pain in the small of his back and elevated body temperature up to 38°C. He took some aspirin. Blood test: leukocytes - $10.5\cdot10^{12$/L, eosinophils - 5%, band neutrophils - 8%, segmented neutrophils - 51%, lymphocytes - 32%, monocytes - 4%, erythrocyte sedimentation rate - 28 mm/hour. Urinalysis: protein - 0.6 g/L, leukocytes - cover the whole vision field, large amount of mucus. What is the most likely diagnosis?a.Tubulointerstitial nephritisb.Acute pyelonephritisc.Acute glomerulonephritisd.Chronic pyelonephritise.Subacute malignant glomerulonephritis

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