Evaluation and Management of Prolonged Fever in Children
Diagnostic Considerations
- The American Academy of Pediatrics recommends that children with fever ≥5 days be evaluated for Kawasaki disease, with immediate echocardiography and laboratory testing if Kawasaki criteria are present 1, 2
- Kawasaki disease must be excluded first in any child with fever ≥5 days, as delayed treatment beyond 10 days significantly increases coronary artery aneurysm risk 2
- The diagnostic criteria for Kawasaki disease include fever ≥5 days, alongside principal features such as bilateral non-exudative conjunctivitis 3, oral mucous membrane changes 1, polymorphous rash on trunk/extremities 2, extremity changes 2, and cervical lymphadenopathy 1
Laboratory Testing and Imaging
- Urinalysis and urine culture are essential in the evaluation of febrile children, with a prevalence of 8.1% in febrile girls aged 1-2 years 4, 1
- Complete blood count with differential, inflammatory markers (ESR, CRP, procalcitonin), blood culture, and comprehensive metabolic panel are recommended laboratory tests 2, 1
- Immediate echocardiography is recommended to assess for coronary artery abnormalities if Kawasaki disease is suspected 2
Management and Treatment
- The American Academy of Pediatrics recommends IVIG 2 g/kg infusion and high-dose aspirin for the treatment of Kawasaki disease 2
- Ceftriaxone 50 mg/kg IV/IM daily is recommended for the initial treatment of urinary tract infections 5
- Empiric doxycycline treatment is recommended for suspected tick-borne disease, regardless of age 2, 6