A 78 year old man, recently returned from India presents with abdominal pain, weakness and diarrhoea.

Vitals: BP 110/60              PR  95/min

His blood tests showNa  124 mmol/l

K  1.7 mmol/l

Cl  94  mmol/l

HCO3  16 mmol/l

Urea  10.3  mmol/l

Creat  133 umol/l

Bilirubin  33  (<21) umol/l

Describe  the acid base status

Give a differential diagnosis

What are you treatment priorities?