Efficacy of infliximab after loss of response of/intolerance to adalimumab in pediatric Crohn's disease: A retrospective multicenter cohort study of the "GETAID pédiatrique".

BACKGROUND: Infliximab (IFX) and adalimumab (ADA) are recommended for induction and maintenance of remission in pediatric Crohn's disease (CD). ADA is now often used in first line due to its efficacy and tolerability, but a loss of response (LOR) can occur over time. The aim was to assess the efficacy of IFX as second line therapy after LOR or intolerance to ADA in pediatric CD patients at 1 year. METHODS: We conducted a retrospective and multicenter study in France among the "GETAID pédiatrique" centers between April 2019 and April 2022. CD patients under 18 years old and treated with IFX after ADA failure or intolerance were included. We collected anthropometric, clinical, and biological data at baseline (start of IFX), at 6 and 12 months. Clinical remission was defined by a Weighted Pediatric CD Activity Index (wPCDAI) score less than 12.5 points. RESULTS: Of the 32 patients included in our study, 27 (84.4%) were still on IFX at 12 months of the switch. Among them, 13 had discontinued ADA because of a LOR, 12 for insufficient response and 2 due to primary nonresponse. At M12, 22 patients were in corticosteroid free clinical remission (68.7%). Under IFX, the wPCDAI decreased over time (47.5 ± 24.1, 16.6 ± 21.2 and 9.7 ± 19.0 at M0, M6 and M12 respectively). The only factor associated with clinical remission at 12 months was absence of perianal disease at the end of the IFX induction. CONCLUSIONS: IFX is effective in maintaining remission at 1 year in pediatric CD patients experiencing a LOR or intolerance with ADA, and IFX could be an interesting therapeutic choice instead of other biologics in this situation.

Interaction of the protective effect of breastfeeding and the aggravating effect of pacifier use in the occurrence of bronchiolitis in children.

BACKGROUND: Acute bronchiolitis affects around 30 % of infants each winter in France. Breastfeeding (BF) is described as being protective against acute lower respiratory infections in developing countries, but this effect is more difficult to demonstrate in industrialized countries. Moreover, the effect of using a pacifier in the occurrence of bronchiolitis is not clearly established. In this context, the aim of the study was to investigate the link between BF and the use of a pacifier in the occurrence of bronchiolitis in children under 1 year of age who presented to five pediatric emergency centers in Pays de la Loire, France. METHOD: A questionnaire collecting data on diet, sociodemographic characteristics, and the reason for presentation was provided at the admission to pediatric emergency centers in five hospitals in Pays de Loire, France, between 2018 and 2020. Children with bronchiolitis were included in group 1, and children consulting for other reasons (except gastrointestinal infections or otitis) were included in group 2. Breastfeeding was classified as exclusive breastfeeding (EBF) and partial breastfeeding (PBF). Pacifier use was classified as frequent and during sleep or not used. RESULTS: The study included 671 children under 1 year of age, including 174 (25.8 %) who were admitted with bronchiolitis. In univariate analysis, a significantly smaller number of children in group 1 s were breastfed (EBF and PBF) at admission compared with children in group 2:21.8 % versus 32.8 %, respectively, (OR=0.57, 95 % CI: 0.38-0.86, p = 0.006); furthermore, children in group 1 used a pacifier more often than those in group 2: 84.5 % versus 75.8 % (OR=1.74, 95 % CI: 1.10-2.76, p = 0.017). In multivariate analysis, after adjusting for age, ongoing BF or EBF beyond 9 and 12 months of age remained a protective factor; however, the protective effect of BF disappeared with the introduction of a pacifier, and pacifier use was significantly associated with bronchiolitis. CONCLUSION: The protective effect of BF against bronchiolitis was demonstrated independently of pacifier use. However, due to the strong association between pacifier use and bronchiolitis, the effect of BF weakened. The advice to be given to parents for BF and pacifier use is discussed.

Breastfeeding and respiratory, ear and gastro-intestinal infections, in children, under the age of one year, admitted through the paediatric emergency departments of five hospitals.

Background: Breastfeeding is a protective factor against respiratory and intestinal infections in developing countries. In developed countries, proof of this protection is more difficult to show. The objective of the study is to compare the proportion of children breastfed during their first year in groups of children with infectious pathologies supposedly prevented by breastfeeding and children free of these infectious pathologies. Method: Questionnaires about diet, socio-demographic data and the motive for consultation were given to the parents upon arrival in the paediatric emergency departments of 5 hospitals located in Pays de Loire (France) in 2018 and 2019. Children with lower respiratory tract infections, acute gastroenteritis and acute otitis media were included in the case group (A), children admitted for other reasons were included in the same control group (B). Breastfeeding was classified as exclusive or partial. Results: During the study period, 741 infants were included, of which 266 (35.9%) in group A. In this group, children were significantly less likely to have been breastfed at the time of admission than children in group B: for example, for children under 6 months, 23.3% were currently breastfed in group A, vs. 36.6% (weaned BF or formula diet) in group B [OR = 0.53 (0.34-0.82); p = 0.004]. Similar results were found at 9 and 12 months. After taking into account the age of the patients, the same results were confirmed with an aOR = 0.60 (0.38-0.94) (p = 0.02) at 6 months, but with when considering six variables six variables, aOR was not significative aOR = 0.65 (0.40-1.05); p = 0.08), meaning that factors such as the childcare out of home, socio-professional categories, and the pacifier decrease the protective effect of breastfeeding. Sensitivity analyses (age-matching, analysis by type of infection) showed the same protection effect provided by breastfeeding when it was pursued for at least 6 months and also that the protective effect of breastfeeding is especially true against gastro-enteritis. Conclusion: Breastfeeding is a protective factor against respiratory, gastrointestinal and ear infections when pursued at least 6 months after birth. Other factors such as collective childcare, pacifiers and low parental professional status can reduce the protective effect of breastfeeding.

Vaccination coverage of children with inflammatory bowel disease after an awareness campaign on the risk of infection.

BACKGROUND: Children with inflammatory bowel disease are at risk of vaccine-preventable diseases mostly due to immunosuppressive drugs. AIM: To evaluate coverage after an awareness campaign informing patients, their parents and general practitioner about the vaccination schedule. METHODS: Vaccination coverage was firstly evaluated and followed by an awareness campaign on the risk of infection via postal mail. The trial is a case-control study on the same patients before and after the awareness campaign. Overall, 92 children were included. A questionnaire was then completed during a routine appointment to collect data including age at diagnosis, age at data collection, treatment history, and vaccination status. RESULTS: Vaccination rates significantly increased for vaccines against diphtheria-tetanus-poliomyelitis (92% vs. 100%), Haemophilus influenzae (88% vs. 98%), hepatitis B (52% vs. 71%), pneumococcus (36% vs. 57%), and meningococcus C (17% vs. 41%) (p<0.05). Children who were older at diagnosis were 1.26 times more likely to be up-to-date with a minimum vaccination schedule (diphtheria-tetanus-poliomyelitis, pertussis, H. influenzae, measles-mumps-rubella, tuberculosis) (p=0.002). CONCLUSION: Informing inflammatory bowel disease patients, their parents and general practitioner about the vaccination schedule via postal mail is easy, inexpensive, reproducible, and increases vaccination coverage. This method reinforces information on the risk of infection during routine visits.