Diagnosis of Kawasaki Disease Clinical criteria (fever ≥ 5 days and characteristic physical examination findings) Serial ECG and echocardiography Testing to rule out other disorders: complete blood count, erythrocyte sedimentation rate, C-reactive protein, antinuclear antibody, rheumatoid factor, albumin, liver enzymes, throat and blood cultures, urinalysis, chest x-ray Diagnosis of Kawasaki disease is by clinical criteria (see table).