Cecilia Mantegazza

Type 1 diabetes and celiac disease:The effects of gluten free diet on metabolic control

Type 1 diabetes mellitus is associated with celiac disease, with a prevalence that varies between 0.6% and 16.4%, according to different studies. After a diagnosis of celiac disease is confirmed by small bowel biopsy, patients are advised to commence a gluten-free diet (GFD). This dietary restriction may be particularly difficult for the child with diabetes, but in Europe (and in Italy) many food stores have targeted this section of the market with better labeling of products and more availability of specific GFD products. Treatment with a GFD in symptomatic patients has been shown to improve the symptoms, signs and complications of celiac disease. However, the effects of a GFD on diabetic control are less well established. Initial reports of improved hypoglycemic control were based on children who were diagnosed with celiac disease associated with malabsorption, but there have subsequently been reports of improvement in patients with type 1 diabetes with subclinical celiac disease. There are other studies reporting no effect, improved control and an improvement of hypoglycemic episodes. Moreover, in this review we wish to focus on low glycemic index foods, often suggested in people with type 1 diabetes, since they might reduce postprandial glycemic excursion and enhance long-term glycemic control. In contrast, GFD may be rich in high glycemic index foods that can increase the risk of obesity, insulin resistance and cardiovascular disease, worsening the metabolic control of the child with diabetes. Hence, it is important to evaluate the impact of a GFD on metabolic control, growth and nutritional status in children with type 1 diabetes.

Epidemiological and clinical features of rotavirus among children younger than 5 years of age hospitalized with acute gastroenteritis in Northern Italy.

BackgroundRotavirus is the major cause of acute gastroenteritis and severe dehydrating diarrhea in young children.MethodsTo estimate the proportion of hospital admissions for rotavirus acute gastroenteritis and identify the circulating G and P genotypes among children under five years of age, we conducted a prospective observational study from January to December 2008, recruiting children consecutively admitted to six hospitals in Milan and nearby towns in northern Italy. Typing was done on stool samples by reverse transcriptase polymerase chain reaction amplification.ResultsOf the 521 stool samples from children with acute gastroenteritis, 34.9% (95%CI, 30.8 to 39.2%) were rotavirus-positive. Two thirds (67.6%) were under two years of age, and 13.2% were under six months. The predominant G type was G1 (40.7%), followed by G9 (22.5%), G2 (13.2%), G3 (5.5%), G4 (3.8%) and G10 (1.6%). Twenty-one (11.7%) mixed-G infections were identified: G1+G10 (8.8%); G1+G9 (1.6%); and G2+G10 (1.2%). Only P[8] (67.6%) and P[4] (12.6%) types were P genotyped. The predominant single G/P combination was G1P[8] (39.7%), followed by G9P[8] (25.3%), G2P[4] (14.3%), and G3P[8] (4.1%). All G-mixed types combined with P[8].ConclusionsThese findings show an high prevalence of rotavirus infections among children admitted to hospital for acute gastroenteritis caused by different rotavirus strains circulating in the area studied.

Suicide in pediatrics: epidemiology, risk factors, warning signs and the role of the pediatrician in detecting them

Epidemiological data suggests suicide is uncommon in childhood but becomes an extremely serious issue among adolescents.Several risk factors have been identified and include the presence of psychiatric illness, a previous suicide attempt, family factors, substance abuse, sexual and physical abuse, disorders in gender identity or bullying. Pediatricians have a primary role in searching for these risk factors, recognizing them and acting synergistically with other specialists to prevent and treat suicidal behavior.Pediatricians should also be able to identify the “warning signs” for suicide since their presence implies a need for immediate action, as attempted suicide may occur in a few hours or days.The use of antidepressant drugs and its association with suicidal risk in pediatric age is another topic of ongoing debate. Food and Drug Administration has recently introduced the so-called “black box” on antidepressants’ packages with the aim of gaining attention to the possible risk of suicide among adolescents who are treated with antidepressants, with a warning that the risk of suicide is higher when starting a therapy or while adjusting its dosage.

The multicomponent meningococcal serogroup B vaccine (4CMenB): origin, composition, health impact and unknown aspects.

Neisseria meningitidis serogroup B is the main cause for meningococcal invasive disease in many parts of the world. Since 2013, a new multicomponent vaccine against meningococcal serogroup B (4CMenB) has been licensed in Europe, Australia, Canada, Chile, Uruguay, USA and Brazil with different immunization schedules. Clinical trials involving adults, adolescents, children and infants showed 4CMenB has a good immunogenicity and safety profile. Strain coverage estimates are similar to or better than other recently approved vaccines, ranging from 66% in Canada to 91% in Unites States. Some points still remain to be clarified such as the best immunization strategy, the effect of 4CMenB on carriage, the long-term persistence of protective bactericidal antibodies titers, long-term safety outcomes, the possible emergence of N. meningitidis escape mutants and the vaccine cost-effectiveness. In this review, we focus on the vaccine composition, clinical trials and suggested schedules, safety data, potential strain coverage and future challenges.

Gut and mesenteric lymph node involvement in pediatric patients infected with human immunodeficiency virus

Background The gastrointestinal tract is a primary target for human immunodeficiency virus (HIV). HIV infection causes a depletion of CD4+ T-lymphocytes in gut-associated lymphoid tissue and affects gastrointestinal mucosal integrity and permeability. The gastrointestinal tract has also been suggested as the main reservoir of HIV despite highly active antiretroviral therapy (HAART). We performed a prospective case-control study to assess gut involvement in HIV-infected patients, either naïve or on HAART, using noninvasive methods such as bowel ultrasound and fecal calprotectin. Methods Thirty HIV-infected children and youth underwent the following tests: CD4+ T-cell count and HIV viral load, fecal calprotectin, and bowel ultrasound, with the latter evaluating bowel wall thickness and mesenteric lymph nodes. Fecal calprotectin and bowel ultrasound were also assessed in 30 healthy controls matched for age and sex. Fecal calprotectin was measured using a quantitative immunochromatographic point-of-care test, and concentrations ranging from 0 to 200 μg/g were considered to be normal reference values in children. Results Fecal calprotectin was normal in 29 HIV-infected patients and was not significantly different from controls (mean values 63.8±42.5 μg/g and 68.3±40.5 μg/g, respectively; P=0.419), and did not correlate with HIV viral load, CD4+ T-cell absolute count and percentage, or HAART treatment. No significant changes were found on bowel ultrasound except for enlarged mesenteric lymph nodes, which were observed in seven HIV-infected patients (23.3%) and two controls (6.6%). This finding was significantly correlated with high HIV viral load (P=0.001) and low CD4+ T-cell percentage (P=0.004). Conclusion HIV-infected children did not have significant biochemical or ultrasonographic signs of bowel inflammation. A few patients showed enlarged mesenteric lymph nodes, which correlated with uncontrolled HIV infection.

Probiotics and antibiotic-associated diarrhea in children: A review and new evidence on Lactobacillus rhamnosus GG during and after antibiotic treatment

Antibiotic associated diarrhea (AAD) is a common complication in childhood in the outpatient and inpatient settings. This review provides up to date information on the use of probiotics in the prevention and treatment of AAD, including that from Clostridium Difficile, in children. The most recently systematic reviews and subsequently published randomized controlleds trials are considered. Different single and multistrain probiotics are described; a specific recommendation for the use of Lactobacillus Rhamnosus GG (LGG) and Saccharomyces boulardii (Sb) emerges. New information on LGG survival under amoxicillin/clavulanate therapy in children is also provided. This information is relevant in view of the frequent use of this molecule in children, its association with AAD, and LGGs sensitivity to penicillin that might make this probiotic ineffective. In spite of a demonstrated positive effect of specific strains of probiotics on AAD, safety issues still remain among which the risk of associated severe infections and of antibiotic resistant gene exchange.

Travelling With Children on Home Parenteral Nutrition.

Background: Home parenteral nutrition (HPN) is an established therapy in children with intestinal failure. Parenteral nutrition (PN) management allows most paediatric patients to participate in age-appropriate activities; however, HPN may lead to significant restrictions, particularly going on holiday. We aimed to identify sociodemographic and illness-specific variables that influence if and how families with children on HPN travel. Methods: A standardised questionnaire was sent to all 40 children on HPN within a large tertiary intestinal failure centre in the United Kingdom. Depending on whether the family had/had not been on holiday since their child had started HPN, questions were asked to understand the reasons for not travelling or to gather information about individual travel experiences. Results: A total of 30 children were enrolled, 20 of 30 went at least once on holiday, and 5 of 30 travelled more than once per year, 70% travelled outside Britain. Going on vacation was more common, the longer the child had been on HPN (P = 0.022); hours spent on PN tolerance of enteral feeds or the childs age did not influence travel behaviour; 80% of parents who went on vacation had a good/worthy experience, 95% would travel again. The biggest reported obstacle was the transportation of PN bags. Ten families sacrificed a holiday over fear that it may be difficult to arrange or because of the childs unstable medical condition. Conclusions: A significant proportion of families chose to go on holiday away from home despite their child being on HPN. The experience is considered good by most.

Celiac Disease in Children: A Review

Celiac disease is a lifelong immune-mediated systemic disorder that may develop in genetically predisposed individuals when exposed to dietary gluten. Its prevalence is estimated to be 1-3% in the European Community; in particular in children studies report a prevalence ranging from 1/500 to 1/93. Awareness of its wide clinical spectrum is mandatory and relevant to all physicians, and in particular pediatricians, to allow a prompt diagnosis and therapy. While the first european guidelines recommended the need of 3 consecutive duodenal biopsies to establish a diagnosis, from 2012 an histological assessment is not considered necessary in certain circumstances in children. Gluten free diet is still the only therapy available in celiac disease disease but dietary adherence allows control of symptoms and reduces the risk of malignancy. However this diet is challenging due to its costs, quality of life implications, and health consequences such as obesity. Therefore alternative therapies are currently being developed. This review will focus on the current knowledge on celiac disease in children.