• Eduardo Mekitarian Filho and Werther Brunow de Carvalho.
• Faculdade de Medicina, Universidade de São Paulo (USP), São Paulo, SP, Brazil; Pediatric Intensive Care Center, Instituto da Criança, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo (USP), São Paulo, SP, Brazil; Pediatric Intensive Care Unit, Hospital Santa Catarina, São Paulo, SP, Brazil; Emergency Care Unit, Hospital Israelita Albert Einstein, São Paulo, SP, Brazil. Electronic address: emf2002@uol.com.br.
• J Pediatr (Rio J). 2015 Nov 1; 91 (6 Suppl 1): S61-6.

ObjectivesTo summarize the main clinical entities associated with fever without source (FWS) in infants, as well as the clinical management of children with occult bacteremia, emphasizing laboratory tests and empirical antibiotics.SourcesA non-systematic review was conducted in the following databases--PubMed, EMBASE, and SciELO, between 2006 and 2015.Summary Of The FindingsThe prevalence of occult bacteremia has been decreasing dramatically in the past few years, due to conjugated vaccination against Streptococcus pneumoniae and Neisseria meningitidis. Additionally, fewer requests for complete blood count and blood cultures have been made for children older than 3 months presenting with FWS. Urinary tract infection is the most prevalent bacterial infection in children with FWS. Some known algorithms, such as Boston and Rochester, can guide the initial risk stratification for occult bacteremia in febrile infants younger than 3 months.ConclusionsThere is no single algorithm to estimate the risk of occult bacteremia in febrile infants, but pediatricians should strongly consider outpatient management in fully vaccinated infants older than 3 months with FWS and good general status. Updated data about the incidence of occult bacteremia in this environment after conjugated vaccination are needed.Copyright © 2015 Sociedade Brasileira de Pediatria. Published by Elsevier Editora Ltda. All rights reserved.

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