AAP Guidelines Help Detect Invasive Bacterial Infections in Febrile Infants

FRIDAY, Dec. 30, 2022 (HealthDay News) -- The American Academy of Pediatrics (AAP) clinical practice guideline (CPG) for management of well-appearing, febrile infants can help detect invasive bacterial infections (IBI) without using C-reactive protein (CRP) and procalcitonin (PCT) with high sensitivity but low specificity, according to a study published online Dec. 9 in Pediatrics.
Tran H. P. Nguyen, M.D., from Kaiser Permanente Northern California in Roseville, and colleagues conducted a retrospective cohort study of infants aged 8 to 60 days presenting at emergency departments between 2010 and 2019 with temperatures ≥38 degrees Celsius who met the inclusion criteria for the AAP CPG. The infants underwent complete blood counts, blood cultures, and urinalysis.
The researchers identified 57 bacteremia and nine bacterial meningitis cases among 1,433 eligible infants (4.0 and 0.6 percent, respectively). Three infants (5 percent) with IBI were misidentified using absolute neutrophil count >5,200/mm3 and temperature >38.5 degrees Celsius as inflammatory markers. For each age group, the sensitivities and specificities for detecting infants with IBIs were 100 and 0 percent, respectively, for 8 to 21 days; 88.9 and 40.4 percent, respectively, for 22 to 28 days; and 93.3 and 32.1 percent, respectively, for 29 to 60 days. For infants aged 8 to 21, 22 to 28, and 29 to 60 days, invasive interventions were recommended for 100, 58 to 100, and 0 to 69 percent, respectively.
"Compared with some other protocols not utilizing CRP and PCT, the AAP CPG may recommend more invasive interventions while detecting IBI with similar sensitivity," the authors write. "Further studies may inform best practices to reduce unnecessary interventions."
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