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BACKGROUND: Children who have suffered from critical illnesses that required treatment in a paediatric intensive care unit (PICU) have long-term physical and neurodevelopmental impairments. The mechanisms underlying this legacy remain largely unknown. In patients suffering from chronic diseases hallmarked by inflammation and oxidative stress, poor long-term outcome has been associated with shorter telomeres. Shortened telomeres have also been reported to result from excessive food consumption and/or unhealthy nutrition. We investigated whether critically ill children admitted to the PICU have shorter-than-normal telomeres, and whether early parenteral nutrition (PN) independently affects telomere length when adjusting for known determinants of telomere length. METHODS: Telomere length was quantified in leukocyte DNA from 342 healthy children and from 1148 patients who had been enrolled in the multicenter, randomised controlled trial (RCT), PEPaNIC. These patients were randomly allocated to initiation of PN within 24 h (early PN) or to withholding PN for one week in PICU (late PN). The impact of early PN versus late PN on the change in telomere length from the first to last PICU-day was investigated with multivariable linear regression analyses. RESULTS: Leukocyte telomeres were 6% shorter than normal upon PICU admission (median 1.625 (IQR 1.446-1.825) telomere/single-copy-gene ratio (T/S) units vs. 1.727 (1.547-1.915) T/S-units in healthy children (P

Background: Food protein-induced enterocolitis is a manifestation of non-IgE-mediated cow's milk allergy, characterized by acute vomiting and profuse diarrhoea. This reaction is often not recognized as cow's milk allergy., Case Description: We present a 6-week-old, formula-fed girl with frequent vomiting, diarrhoea and failure to thrive. These symptoms disappeared after giving cow's milk-free formula. Forty-five minutes after the last dose in a non-blinded provocation test with cow's milk, she developed profuse diarrhoea and vomiting, resulting in hypovolemic shock. No specific IgE against cow's milk was found., Conclusion: Unusual in this case is the severe but relatively late reaction to the provocation test. In an acutely ill infant with vomiting, diarrhoea and pallor - which can even result in shock - food protein-induced enterocolitis as manifestation of non-IgE-mediated allergy must be considered. These symptoms start as late as 2 to 3 hours after exposure and disappear after withdrawal of the causal product.