Full blood count and film |
Erythrocyte sedimentation rate |
C reactive protein |
Blood cultures |
ASOT and anti DNase B |
Nose and throat swab, and stool sample for culture (superantigen toxin typing if Staphylococcus aureus and/or β haemolytic streptococci detected) |
Renal and liver function tests |
Coagulation screen |
Autoantibody profile (antinuclear antibodies; extractable nuclear antibodies; rheumatoid factor; antineutrophil cytoplasmic antibodies) |
Serology (IgG and IgM) for mycoplasma pneumoniae, enterovirus, adenovirus, measles, parvovirus, Epstein–Barr virus, cytomegalovirus |
Urine microscopy and culture |
Dip test of urine for blood and protein |
Electrocardiogram and echocardiogram (see fig 1) |
Consider serology for rickettsiae and leptospirosis if history suggestive |
Consider chest x ray |
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