Blood culture x2.
Microbiological studies, as appropriate, on any identified focus of infection.
Full blood count, Blood film, White cell count differential, Platelet count; Electrolytes, Creatinine, Urea, Liver function tests, Coagulation profile, Calcium, Phosphate, Albumin. Consider Troponin, Lipase, Beta HCG quantitation in females, Lactate, Blood group and hold, Blood gas arterial.
Antimicrobial treatment should not be delayed if the patient is clinically septicaemic.
In severely ill patients: Blood gas arterial, Lactate, C-Reactive protein.
See Guideline on Pathology testing in the Emergency department: Appendix 2.
See also Infection (increased susceptibility)
See Splenic atrophy/absence