title: Prolonged fever with negative laboratory tests in an infant.
mesh_terms: D001431:Bacteriological Techniques; D002555:Cerebrospinal Fluid / Q000382:microbiology; D005260:Female; D005334:Fever / Q000209:etiology*; D005335:Fever of Unknown Origin; D006801:Humans; D007223:Infant; D013129:Spinal Puncture