Table 2 Main clinical, laboratory and microbiological data

Fever ≥ 38°C

1155 (87.2)

Chills

982 (74.1)

Flank pain

789 (59.5)

Costovertebral tenderness

751 (56.7)

Mictional syndrome

817 (61.6)

Systolic blood pressure ≤ 90 mm Hg

266 (20.2)

Leukocytosis

989 (74.7)

Thrombopoenia

190 (14.3)

C-reactive protein ≥ 6 mg/L^a

587 (93.9)

Pyuria

1164 (87.9)

Microscopic haematuria

527 (39.8)

Bacteriuria

382 (28.8)

Pathogens responsible for episodes of Complicated pyelonephritis

Escherichia coli

615 (67)

Klebsiella spp

73 (7.9)

Proteus spp

61 (6.1)

Enterobacter spp

33 (3.6)

Non-fermenting GNB^b

50 (5.4)

Enterococcus faecalis

31 (3.4)

Other Gram positive bacilli

8 (0.9)

Polymicrobial

23 (2.5)

Candida spp

10 (1.1)

Others

14 (1.5)