| Full blood count | Hb 102 g/l, WBC 19 x 109/l, Platelet count 90x109/l |
| Blood film | A blood film showed evidence of haemolysis with fragmented red blood cells. |
| Serum urea and electrolytes | Urea 18 mmol/l, Sodium 139 mmol/l, Potassium 3.8 mmol/l, Creatinine 106 μmol/l |
| Serum bicarbonate | Bicarbonate 16 mmol/l |
| Liver function tests | Normal |
| Bone profile | Calcium 2.1 mmol/l, Phosphate 2.3 mmol/l, Alkaline phosphatase 234 IU/l, Albumin 31 g/l |
| Lactate dehydrogenase (LDH) | 2,213 U/l |
| Urine electrolytes | No urine available |
| Stool culture | Sent |
| E. coli O157 serology | Sent |
What are the key diagnostic features?