Haemophilus influenzae type b septic arthritis in children: report of 23 cases.
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Twenty-three cases of Haemophilus influenzae type b septic arthritis seen over a recent 5-year period are reviewed. The natural history of the disease includes a mean three days of fever and joint symptoms prior to hospitalization, often accompanied or immediately preceded by a viral illness and/or otitis media. Concurrent H influenzae type B meningitis was present in 30% of patients and concurrent osteomyelitis in 22%. Infants remained febrile in the hospital for a mean of 3.6 consecutive days. However, secondary and prolonged fevers were common. Clinical improvement in the joint examination was first seen at a mean of 2.5 days. Characteristic laboratory findings during recovery included a decline in total WBC count, neutrophil count, ESR, and hematocrit, with a concomitant increase in lymphocyte and platelet counts. Outpatient follow-up for a mean duration of 20 months found only two of 21 infants with residual impairment. The time to total healing in the remaining 19 infants, however, varied widely--from nine days to 17 months (mean of 4 months).