Abstract Objectives To evaluate outcomes of oral food challenge (OFC) test to assess tolerance in infants with non-IgE-mediated cow's milk allergy (CMA) with gastrointestinal manifestations and explore clinical data predictive of these outcomes. Methods Single-center retrospective study including infants (age < 12 months) who were referred for CMA between 2000 and 2018 and underwent OFC on follow-up. A univariate logistic regression test was performed to evaluate variables associated with the outcomes of the follow-up OFC test. Results Eighty-two patients were included, 50% were male. Eighteen patients had a positive OFC test (22%). Most patients had presented with hematochezia (77%). The median age of symptom onset was 30 days. Two-thirds of the patients were on appropriate infant formula (extensively hydrolyzed or amino acid-based formula), exclusively or in association with breastfeeding. The median time on an elimination diet before the OFC test was 8 months (Q1 6 - Q3 11 months). All cases with positive follow-up OFC tests (n= 18) had been exposed to cow's milk-based formula before the first clinical manifestation of CMA. Five out of eight cases with Food Protein-Induced Enterocolitis Syndrome (FPIES) had positive OFC tests. Exposure to cow's milk-based formula before diagnosis, a history of other food allergies, hematochezia and diarrhea were predictors of a positive OFC test. Conclusions In infants with non-IgE-mediated CMPA with gastrointestinal manifestations, the use of cow's milk-based formula, a history of other food allergies, and hematochezia and diarrhea upon initial presentation were associated factors for the later achievement of tolerance.

RESUMO Objetivo: Descrever um caso de sífilis congênita com diagnóstico tardio e identificar as oportunidades perdidas nas diversas fases/níveis da atenção à saúde, que retardaram a realização do diagnóstico. Descrição do caso: Menino, 34 dias de vida, encaminhado da Unidade Básica de Saúde a um hospital terciário por apresentar aumento do volume abdominal e icterícia progressiva há 2 semanas, hipocolia fecal, hepatoesplenomegalia, anemia, plaquetopenia e elevação de enzimas hepáticas. Ao exame físico, apresentava lesões eritemato-descamativas nas mãos e nos pés e exantema macular em região inguinal, presença de ascite, fígado palpável a 5 cm do rebordo costal direito e baço palpável a 3 cm do rebordo costal esquerdo. Sorologia do lactente: CMIA (quimioluminescência de micropartículas) reagente, VDRL (Venereal Diseases Research Laboratory) 1:1024 e TPHA (Treponema pallidum Hemaglutination) reagente. Sorologia materna: CMIA e TPHA reagentes, VDRL 1:256. Radiografia de ossos longos mostrava periostite simétrica; levantamento periosteal; e bandas metafisárias lucentes em fêmures, úmeros, ulnas e tíbias. Após tratamento com penicilina cristalina, apresentou melhora clínica e laboratorial, recebendo alta no 18º dia de internação. Comentários: Este caso mostra que ainda ocorre diagnóstico tardio de sífilis congênita por falhas nas estratégias de prevenção dessa doença, tanto na atenção básica quanto nos níveis secundário e terciário. A aplicação das intervenções preconizadas pelo Ministério da Saúde e a identificação das situações em que ocorrem falhas na sua execução são importantes para a avaliação da assistência de rotina em todos os níveis de atenção e nas diversas unidades responsáveis pelo cuidado do recém-nascido e do lactente jovem.

ABSTRACT Objective: To describe a case of congenital syphilis with a late diagnosis and identify missed opportunities at diverse phases/levels of healthcare, which led to late diagnosis. Case description: Boy, 34 days of life, referred from a basic healthcare unit to a tertiary hospital due to enlarged abdominal volume and progressive jaundice for 2 weeks, fecal hypocholia, hepatosplenomegaly, anemia, low platelet count and elevated liver enzymes. At physical examination, the infant presented with erythematous-exfoliative lesions on the palms and soles, macular rash in the inguinal region, ascitis, palpable liver 5 cm below the right costal margin and a palpable spleen 3 cm from the left costal margin. Infant serology: reactive CMIA (chemiluminescent microparticle immunoassay), VDRL (Venereal Diseases Research Laboratory) 1:1024 and reactive TPHA (Treponema pallidum Hemagglutination). Maternal serology: reactive CMIA and TPHA, VDRL 1:256. Radiography of the long bones showed symmetric periostitis, periosteal thickening, and lucent bands in the femur, humerus, ulna and tibia. After treatment with crystalline penicillin, the infant showed clinical and laboratory improvement, receiving hospital discharge at the 18th hospitalization day. Comments: This case shows that congenital syphilis is occasionally diagnosed late as a result of failed strategies to prevent this disease, both in the basic and secondary/tertiary levels of care. The application of interventions recommended by the Ministry of Health and identification of the situation in which there is ineffective implementation of these measures are important to assess routine care in all levels of healthcare and diverse units responsible for newborn and infant health care.