A man was brought into the admission room after 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 · 1012/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?

Acute glomerulonephritis
Acute pyelonephritis
Chronic pyelonephritis
Subacute malignant glomerulonephritis
Tubulointerstitial nephritis

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