Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a pathogen with enteric tropism. We compared the clinical, biochemical and radiological features of children hospitalized for acute SARS-CoV-2 infection, classified in two groups based on the presence of diarrhea. Logistic regression analyses were used to investigate the variables associated with diarrhea. Overall, 407 children were included in the study (226 males, 55.5%, mean age 3.9 ± 5.0 years), of whom 77 (18.9%) presented with diarrhea, which was mild in most cases. Diarrhea prevalence was higher during the Alpha (23.6%) and Delta waves (21.9%), and in children aged 5–11 y (23.8%). Other gastrointestinal symptoms were most commonly reported in children with diarrhea (p < 0.05). Children with diarrhea showed an increased systemic inflammatory state (higher C-reactive protein, procalcitonin and ferritin levels, p < 0.005), higher local inflammation as judged by mesenteric fat hyperechogenicity (adjusted Odds Ratio 3.31, 95%CI 1.13–9.70) and a lower chance of previous immunosuppressive state (adjusted Odds Ratio 0.19, 95%CI 0.05–0.70). Diarrhea is a frequent feature of pediatric COVID-19 and is associated with increased systemic inflammation, which is related to the local mesenteric fat inflammatory response, confirming the implication of the gut not only in multisystem inflammatory syndrome but also in the acute phase of the infection.

Since the post-pandemic period, there has been an increase in the incidence of eating disorders (EADs) and a lowering of the age of onset. In addition to the ‘classic’ forms, there has also been an increase in new forms of EADs. This article proposes a brief review of the literature concerning mainly two of these new disorders: atypical anorexia and avoidant/restrictive food intake disorder. In addition, a brief overview is proposed of the most frequently raised questions that clinicians may face when dealing with EADs. The answers are provided by doctors from the Federico II University of Naples, who additionally offer the most common red flags on the topic derived from long clinical experience. This article is proposed to be a brief operational guide for all clinicians working in the pediatric area in order to provide diagnostic clues and useful elements to refer patients to specialists for a correct and multidisciplinary treatment.

In this Special Issue, titled “Pediatric Nutrition in Different Countries”, we give concise and straightforward information on the nutritional habits of children in different countries worldwide [...]