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Usefulness of Low-Risk Criteria for Serious Bacterial Infections in Febrile Infants Younger than 90 Days of Age

Other Title
90일 이하 발열 환아에게 중증 세균성 감염의 저위험 예측기준의 유용성
신, 연호; 민, 영기; 이, 지숙; 전, 우찬
Taehan Ŭnggup Ŭihakhoe chi, 23(6):819-824, 2012
Journal Title
Taehan Ŭnggup Ŭihakhoe chi; Journal of the Korean Society of Emergency Medicine; 대한응급의학회지
Purpose: To examine the usefulness of simple and quick criteria for identifying febrile infants younger than 90 days with a low risk for serious bacterial infection (SBI).

Methods: We conducted a retrospective study of febrile infants younger than 90 days who visited an emergency

department (ED) between July 2010 and June 2011. We reviewed their medical history, physical examination findings, levels of white blood cells (WBC) and C-reactive protein (CRP), blood culture, urinalysis, and an analysis of their cerebrospinal fluid (CSF). Patients who met all the following criteria were considered to have a low risk for SBI: (1) an unremarkable medical history, (2) a good appearance, (3) no focal physical signs of infection, (4) WBC 5,000~15,000 /mm3, (5) CRP <2.0 mg/dL, (6) a normal urinalysis, and (7) CSF WBC <25 /mm3 for neonate or <10 /mm3 for infants between 29 days and 90 days. SBI was defined as a positive culture of bacteria from blood, cerebrospinal fluid, or urine.

Results: Complete data were available for 493 infants. SBI was documented in 62(12.6%) infants, with 54(11.0%) having a urinary tract infection, 3(0.6%) with bacteremia, 1 (0.2%) with bacterial meningitis, and 4(0.8%) with co-infections. The sensitivity and negative predictive value for SBI from the combination of low-risk criteria was 98.4% and 99.6%, respectively.

Conclusion: Although low-risk infants must be carefully observed, our criteria for low-risk might be a reliable and useful tool for excluding SBI for febrile young infants in ED.
Febrile infantsSerious bacterial infectionLow-risk criteria
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Emergency Medicine
AJOU Authors
민, 영기이, 지숙
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