Outcome associated with EPCAM founder mutation c.499dup in Qatar.

Tufting enteropathy (TE) is a rare autosomal recessive congenital enteropathy that usually requires long-term parenteral nutrition (PN). In the Arabic Peninsula, four distinct EPCAM mutations have been identified to cause TE. As consanguineous marriages are socially favored, pre-marital and pre-conception testing has become a critical disease prevention strategy. This study aimed to identify the pathogenic EPCAM mutations causing TE in Qatari families and determine possible genotype-phenotype correlations. Twenty-two TE patients from seven multiplex families with TE were identified. Blood samples were collected from patients and first-degree relatives. Exons of the gene were amplified and sequenced. Retrospective chart review and/or family interviews were conducted to determine phenotypic characteristics of the disease. Sequence analysis revealed a single, previously described c.499dup mutation in exon 5 of all families tested, suggesting a founder effect. Of the 18 patients whose full clinical information was available, three patients (17%) were off PN with a good quality of life, without intestinal transplantation, and one (6%) was receiving partial PN. Our patients with TE were severely stunted compared to a similar group of patients receiving long-term PN for short bowel syndrome, suggesting that this could possibly be due to TE rather than secondary to inadequate nutrition. Our study identified the EPCAM mutation c.499dup as the genetic defect causing TE in all the participant Qatari families. This finding should facilitate early diagnosis of TE and genetic counseling. Furthermore, it should aid in the prevention of TE through pre-marital screening, antenatal diagnosis, and pre-implantation genetic diagnosis.

Association of vitamin D and diarrhoea in children aged less than five years at Muhimbili national hospital, Dar es Salaam: an unmatched case control study.

BACKGROUND: There has been a growing interest in the non-skeletal roles of vitamin D particularly its immune-modulatory properties which has been shown to influence the susceptibility and severity to infections. There is insufficient data globally on the association between Vitamin D levels and Diarrhoea in children. The objective of the study was to determine the association between vitamin D levels and diarrhoea in children aged less than five years. METHODS: Hospital based unmatched case-control study was carried out at MNH between September 2015 and January 2016. Cases were defined as patients with diarrhoea, Sick controls were patients who did not have diarrhoea but were admitted for other illnesses and Healthy controls were children who had neither diarrhoea nor other co-morbid conditions. Structured questionnaires were used to capture the demographic data and anthropometric measurements. Blood samples of study participants were tested for serum vitamin D levels and grouped as vitamin D sufficient, insufficient or deficient (VDD). SPSSv.20 was used to carry out the Statistical analysis. Binary logistic regression, Mann-Whitney and Kruskal-Wallis tests were used, a p-value≤ 0.05 was considered to be statistically significant. RESULTS: A total of 188 children under five were recruited in the study at the ratio of 1 case: 3 controls, of these 47 were Cases, 94 were Sick controls and remaining 47 were Healthy controls. The mean age was 17.01 ± 14.8 months. The mean vitamin D level was 51.18 ± 21.97 nmol/l. Majority of the participants 101 (53.7%) were vitamin D deficient, 64 (34%) were insufficient and 23 (12.2%) had sufficient vitamin D levels. Sick controls were 3.2 times more likely to be VDD compared to cases [95% CI 0.14-0.69; p = 0.0015] and 5.03 times when compared to Healthy controls [95% CI 2.22-11.55; p = 0.000]. Severe acute malnutrition (SAM) was independently associated with diarrhoea (95% CI: 1.26-5.39, p 0.01). CONCLUSIONS: High prevalence of vitamin D deficiency was found in the children under five years studied. Vitamin D levels was not found to be specifically associated with diarrhoea in children under five years of age.

Birth weight and postnatal microbial exposures predict the distribution of peripheral blood leukocyte subsets in young adults in the Philippines.

The immune system not only provides protection against infectious disease but also contributes to the etiology of neoplastic, atopic, and cardiovascular and metabolic diseases. Prenatal and postnatal nutritional and microbial environments have lasting effects on multiple aspects of immunity, indicating that immune processes may play important roles in the developmental origins of disease. The objective of this study is to evaluate the association between birth weight and the distribution of leukocyte (white blood cell) subsets in peripheral blood in young adulthood. Postnatal microbial exposures were also considered as predictors of leukocyte distribution. Participants (n=486; mean age=20.9 years) were drawn from a prospective birth cohort study in the Philippines, and analyses focused on the following cell types: CD4 T lymphocytes, CD8 T lymphocytes, B lymphocytes, natural killer cells, monocytes, granulocytes. Higher birth weight was a strong predictor of higher proportion of CD4 T lymphocytes (B=0.12, s.e.=0.041, P=0.003), lower proportion of CD8 T lymphocytes (B=-0.874, s.e.=0.364, P=0.016), higher CD4:CD8 ratio (B=1.964, s.e.=0.658, P=0.003), and higher B lymphocytes (B=0.062, s.e.=0.031, P=0.047). Measures of microbial exposure in infancy were negatively associated with proportions of B lymphocytes and granulocytes, and lower CD4:CD8 ratio. Leukocytes are the key regulators and effectors of innate and specific immunity, but the origins of variation in the distribution of cell type across individuals are not known. Our findings point toward nutritional and microbial exposures in infancy as potentially important determinants of immune-phenotypes in adulthood, and they suggest that leukocyte distribution is a plausible mechanism through which developmental environments have lasting effects on disease risk in adulthood.

Prevalence, clinical predictors, and outcome of hypocalcaemia in severely-malnourished under-five children admitted to an urban hospital in Bangladesh: a case-control study.

Hypocalcaemia is common in severely-malnourished children and is often associated with fatal outcome. There is very limited information on the clinical predicting factors of hypocalcaemia in hospitalized severely-malnourished under-five children. Our objective was to evaluate the prevalence, clinical predicting factors, and outcome of hypocalcaemia in such children. In this case-control study, all severely-malnourished under-five children (n=333) admitted to the Longer Stay Ward (LSW), High Dependency Unit (HDU), and Intensive Care Unit (ICU) of the Dhaka Hospital of icddr,b between April 2011 and April 2012, who also had their total serum calcium estimated, were enrolled. Those who presented with hypocalcaemia (serum calcium <2.12 mmol/L) constituted the cases (n=87), and those admitted without hypocalcaemia (n=246) constituted the control group in our analysis. The prevalence of hypocalcaemia among severely-malnourished under-five children was 26% (87/333). The fatality rate among cases was significantly higher than that in the controls (17% vs 5%; p < 0.001). Using logistic regression analysis, after adjusting for potential confounders, such as vomiting, abdominal distension, and diastolic hypotension, we identified acute watery diarrhoea (AWD) (OR 2.19, 95% CI 1.08-4.43, p = 0.030), convulsion on admission (OR 21.86, 95% CI 2.57-185.86, p = 0.005), and lethargy (OR 2.70, 95% CI 1.633-5.46, p = 0.006) as independent predictors of hypocalcaemia in severely-malnourished children. It is concluded, severely-malnourished children presenting with hypocalcaemia have an increased risk of death than those without hypocalcaemia. AWD, convulsion, and lethargy assessed on admission to hospital are the clinical predictors of hypocalcaemia in such children. Presence of these features in hospitalized children with severe acute malnutrition (SAM) should alert clinicians about the possibility of hypocalcaemia and may help undertake potential preventive measures, such as calcium supplementation, in addition to other aspects of management of such children, especially in the resource-poor settings.

Frequency of symptomatic zinc deficiency in very low birth weight infants.

Current concepts on zinc requirements for premature infants rely on studies dating back more than 20 years. Given that nowadays more premature infants frequently survive we aimed to obtain recent frequency data on zinc deficiency in very low birth weight (VLBW) infants.226 VLBW infants born between July 2005 and December 2009 were retrospectively included in this study. Mean gestational age (GA) was 28.7 weeks (range 23+0 to 38+0) and mean birth weight 1120g (range 354-1495). All infants received zinc supplementation according to the ESPGHAN guidelines. 26 (11.5%) patients showed clinical signs for zinc deficiency of whom 15 had serum zinc concentrations < 50µg/dl, 9 between 50 and 70 µg/dl and 2 > 70 µg/dl. Infants presenting with dermatitis had significantly lower concentrations (mean 26.7 µg/dl, range 19-31) when compared to infants with diarrhoea or isolated peripheral oedema (35.3 µg/dl and 51.8 µg/dl respectively). Strongest independent risk factors were low GA, being small for GA and suffering from intestinal resection due to necrotizing enterocolitis. Frequency of zinc concentrations <50 µg/dl were calculated to be 6.6% in VLBW infants.Even though current guidelines for zinc supplementation were followed the frequency of zinc deficiency was found to be unexpectedly high in ELBW and SGA infants. Despite the retrospective nature of this single centre study, our data strongly suggest that recommendations on zinc supplementation in ELBW and SGA infants should be reviewed.

Use of only oral rehydration salt solution for successful management of a young infant with serum sodium of 201 mmol/L in an urban diarrhoeal diseases hospital, Bangladesh.

A boy aged 4 months 7 days was admitted to the Intensive Care Unit (ICU) of the Dhaka Hospital of icddr,b, Dhaka, Bangladesh, with the problems of acute watery diarrhoea with some dehydration, pneumonia, lethargy, and hypernatraemia (serum sodium of 201 mmol/L). Correction for hypernatraemia was tried by using only oral rehydration salt (ORS) solution. Seizures occurred during correction of the hypernatraemia. These were difficult to control and required three doses of injection lorazepam, a loading dose of injection phenobarbitone, followed by injection phenytoin and finally two doses of injection mannitol (even though there was no clinical or imaging evidence by ultrasonography or computed tomography of cerebral oedema). The correction was continued with ORS, and all the anticonvulsants were successfully weaned without any further seizures, and the patient recovered without any overt neurological sequelae. We present a case report of extreme hypernatraemia, which was successfully managed using only ORS.

Evaluation of simple laboratory investigations to predict fatal outcome in infants with severe malnutrition presenting in an urban diarrhoea treatment centre in Bangladesh.

OBJECTIVE: To evaluate rapid and simple laboratory investigations to predict fatal outcome in infants presenting with diarrhoea and severe malnutrition. METHOD: Retrospective chart analysis of infants with severe malnutrition and diarrhoea with (cases) and without fatal outcome (controls) admitted to the Special Care Ward in Dhaka Hospital at ICDDR,B between May 2005 and April 2006. All infants (n=61) who underwent bedside blood glucose, full peripheral blood count, serum C-reactive protein (CRP), and serum electrolyte tests were included. RESULTS: In logistic regression analyses, after adjusting for all available potential confounders (abnormal WBC count, higher CRP level, hyponatraemia, hypokalaemia, hypocalcaemia, and hypomagnesaemia), cases (n=10) were significantly associated only with hypoglycaemia (measured using a portable bedside finger blood glucose test) (odds ratio 5.0, CI 1.1-23.0, P=0.039) on admission. CONCLUSION: A simple rapid bedside glucose test may be used to predict the outcome of diarrhoeal infants presenting with severe malnutrition.

Effect of glutamine supplementation on lymphocyte subsets in children with acute diarrhea.

To study the effect of glutamine supplementation on lymphocyte subpopulation counts in children with acute diarrhea, children aged 6-24 months were enrolled in a double-blind randomized study. Cases had received either 0.3 g/kg/day of glutamine or placebo orally for seven days. The counts of blood leukocytes, lymphocytes and lymphocyte subpopulations (CD3+, CD4+, CD8+, CD19+, CD16+CD56+) were determined both on admission and seven days later using a flow cytometry. When adjusting for sex, current breastfeeding status, dehydration, and nutritional status of children, lymphocyte subpopulations did not differ significantly between the glutamine- and placebo-supplemented groups on the 7th day of intervention.

Mutations in TTC37 cause trichohepatoenteric syndrome (phenotypic diarrhea of infancy).

BACKGROUND & AIMS: Trichohepatoenteric syndrome (THES) is an autosomal-recessive disorder characterized by life-threatening diarrhea in infancy, immunodeficiency, liver disease, trichorrhexis nodosa, facial dysmorphism, hypopigmentation, and cardiac defects. We attempted to characterize the phenotype and elucidate the molecular basis of THES. METHODS: Twelve patients with classic THES from 11 families had detailed phenotyping. Autozygosity mapping was undertaken in 8 patients from consanguineous families using 250,000 single nucleotide polymorphism arrays and linked regions evaluated using microsatellite markers. Linkage was confirmed to one region from which candidate genes were analyzed. The effect of mutations on protein production and/or localization in hepatocytes and intestinal epithelial cells from affected patients was characterized by immunohistochemistry. RESULTS: Previously unrecognized platelet abnormalities (reduced platelet alpha-granules, unusual stimulated alpha granule content release, abnormal lipid inclusions, abnormal platelet canalicular system, and reduced number of microtubules) were identified. The THES locus was mapped to 5q14.3-5q21.2. Sequencing of candidate genes showed mutations in TTC37, which encodes the uncharacterized tetratricopeptide repeat protein, thespin. Bioinformatic analysis suggested thespin to be involved in protein-protein interactions or chaperone. Preliminary studies of enterocyte brush-border ion transporter proteins (sodium hydrogen exchanger 2, sodium hydrogen exchanger 3, aquaporin 7, sodium iodide symporter, and hydrogen potassium adenosine triphosphatase [ATPase]) showed reduced expression or mislocalization in all THES patients with different profiles for each. In contrast the basolateral localization of Na/K ATPase was not altered. CONCLUSIONS: THES is caused by mutations in TTC37. TTC37 mutations have a multisystem effect, which may be owing to abnormal stability and/or intracellular localization of TTC37 target proteins.

Factors associated with sclerema in infants with diarrhoeal disease: a matched case-control study.

AIM: To identify clinical and biochemical factors associated with sclerema in infants with diarrhoeal illness, and their outcome. METHODS: In this case-control study, we enrolled 30 infants with clinical sepsis with sclerema (cases) and another 60, age- and sex-matched infants with clinical sepsis but without sclerema (controls) from among those admitted to the special care unit (SCU) and longer stay unit (LSU) of the Dhaka Hospital of International Centre for Diarrhoeal Disease Research, Bangladesh (ICDDR,B) for their diarrhoeal illness from May 2005 through April 2006. Sclerema as the dependant variable while hypoxia, hypothermia, C-reactive protein (CRP) level, serum total protein and prealbumin level were the major independent variables compared in the analysis. Differences in proportions were compared by the chi-square test and differences of mean were compared by Student's t-test or Mann-Whitney test, as appropriate. RESULTS: The case-fatality was significantly higher among the cases than the controls (30% vs. 2%, CI 2.9-565.5). After adjusting for confounders, infants with sclerema were more likely to be hypothermic (OR 11.6, 95% CI 1.1-126.5), and have lower serum total protein (OR 1.12, 95% CI 1.04-1.21) and prealbumin (OR 1.5, 95% CI 1.1-2.3). CONCLUSION: Diarrhoeal infants having clinical sepsis presenting with hypothermia, lower serum protein and prealbumin are prone to be associated with sclerema.

Prevalencia de norovirus como agente etiológico de gastroenteritis en niños venezolanos / Prevalence of norovirus like gastroenteritis etiologic agent in venezuelan children

Las gastroenteritis representan una causa importante de morbimortalidad en el mundo y en Venezuela. Su etioligía en infantes es principalmente viral, encontrando a los Norovirus como agentes asociados. Considerando la escasa documentación al respecto, se realizó este estudio para evaluar la prevalencia de Norovirus en niños de 0 a 10 años con diarrea aguda que acudieron a la Policlínica Metropolitana en Caracas; verificando su asociación con otros factores etiológicos y demográficos. 102 muestras fecales fueron sometidas al análisis bacteriológico, parasitológico y viral, utilizando para la detección de Norovirus un ensayo ELISA RIDASCREEN Norwalk-like-Virus. Al análisis estadístico incluyó los índices O. R, y Chi Cuadrado para analizar las frecuencias de los agentes etiológicos, permitiendo además verificar si la diarrea por Norovirus era Independiente de otros patogénos, del sexo y grupos etareos. Se utilizó Excel y el paquete estadístico SPSS 1.0. Los resultados sugirieron que el riesgo de diarrea por Norovirus se sextuplicó en los niños de 1-2 años en comparación con los mayores a 5 años (O.R 5,8842 p:0,0070;x210,879 p:0,012). En los casos positivos, la prevalencia de Norovirus fue del 68,9% y 30% de ellos presentó coinfección con otros patógenos, pero la asociación no fue significativa (p>0,05). Considerando los casos de diarrea que quedan sin diagnósticar, sería lógico pensar que Norovirus circularía con una lata frecuencia en Venezuela, ya que la prevalencia fue superior a la resprtada en otras poblaciones (39,2% vs 5-33%). El impacto de las infecciones por Norovirus en Venezuela se desconece completamente y debe ser estudiado con mayor profundidad.

Gastroenteritis is a very important cause of mobility and mortality in Venezuela and the rest of the World. Their etiology on children is mainly caused by viruses, including Norovirus. Considering the lack of related documentarion in Venezuela, we performed a study in order to calculate the prevalence of Norovirus on children betwen 0 to 10 years old, with acute diarrhea treated on the Policlinica Metropolitna, Caracas; also we analyzed his association with other etiological and demographic factors. 102 stool samples were tested for bacteria parasitic and viruses. For Norovirus we used the ELISA RIDASCREEN Norwalk-like-Virus, (r-biopharm, Germany). The statistical calculations included O.R. and Chi Square ratios, in order to analyze the frequency of the different etiological agents and also to verify if the diarrheas for Norovirus were independent from other pathogenic agents, sex or age groups. We used Excel and SPSS 1.0 software for statistical calculations. The results suggested that the risk of getting a diarrhea caused for Norovirus was 6 times higher on children from 1 to 2 years old than those older that five years old. (OR 5,8842 p:0,0070;x210,879p:0,012) The prevalence for Norovirus was 68,9% and 30% of them presented simultaneous infection with other pathogenic agents, but this association wasn't significative (p>0,05). Considering the high number of diarrhea cases that lack of a proper etiological diagnostic, it's possible that the Norovirus are circulating with a high frequency in Venezuela, due the prevalence reported on this study is above the reported in other population studies (39,2% vs 5-33%). The actual impact of Norovirus in Venezuela is still unknown and must be study with more detail.

[Prevalence of adenovirus antigens in children presenting with acute diarrhoea]. / Prévalence des antigènes d'adénovirus chez les enfants atteints de diarrhée aiguië.

Viral diarrhoea remains a major cause of childhood morbidity and mortality worldwide. Four major categories of viruses are now recognized as clinically important, including rotavirus, astrovirus, adenovirus, and calicivirus. This retrospective epidemiological study was conducted in the East centre part of Tunisia. A total of 638 stool samples were collected from children under 5 years of age presenting with acute diarrhoea at hospitals the East centre part of Tunisia between October 2003 and September 2005. All samples were analyzed using commercially available immunoenzymatic assay (EIA) kits to detect specific adenovirus antigens. Samples positive for adenovirus antigen were further screened using an ELISA technique allowing specific detection of species F enteric adenovirus types 40 and 41. Adenovirus was detected in 6% of the stools tested using ELISA. Among stool samples testing positive for adenovirus, 57% (20/35) were found to contain species F adenovirus types 40/41. In addition to diarrhoea that was present in all children studied, vomiting and fever were observed in 89% and 53% respectively and were associated with respiratory troubles in 32%. Enteric adenoviruses appear to play an important role in paediatric diarrhoea in Tunisia. Use of simple effective viral diagnostic techniques in paediatric hospitals could improve patient care by reducing unnecessary use of antibiotics.

Efficacy of zinc in young infants with acute watery diarrhea.

BACKGROUND: Recent studies reported that zinc significantly reduced the duration and volume of acute watery diarrhea in children aged > or = 4 mo, but there were no data specifically on infants aged < 6 mo. OBJECTIVE: This study investigated the effect of zinc on the duration of illness and the stool quantity in acute watery diarrhea of infants aged 1-6 mo by comparing a 20 mg Zn/d dose with a 5 mg Zn/d dose. DESIGN: Infants hospitalized with at least some dehydration (by World Health Organization classification) were enrolled in a double-blind, randomized, placebo-controlled trial. Infants were randomly assigned to receive 20 mg Zn (acetate)/d, 5 mg Zn/d, or placebo for the duration of illness. RESULTS: Two hundred seventy-five infants were enrolled between 20 September 1998 and 18 December 2000. Neither diarrhea duration nor mean stool volume differed between groups. There were no significant differences in fluid intake, the need for unscheduled intravenous fluid, weight gain, or vomiting rates between the groups. CONCLUSIONS: Zinc supplementation did not affect diarrhea duration or stool volume in young infants. Young infants tolerated both zinc doses. A beneficial effect on subsequent illness cannot be ruled out.

Elevated blood concentrations of calcineurin inhibitors during diarrheal episode in pediatric liver transplant recipients: involvement of the suppression of intestinal cytochrome P450 3A and P-glycoprotein.

We encountered two cases of pediatric living-related liver transplant recipients who showed increases in blood concentration of cyclosporine or tacrolimus, a dual substrate for cytochrome P450 (CYP) 3A and P-glycoprotein (P-gp), during a diarrheal episode. To investigate the effect of intestinal inflammation on the metabolic and efflux pump activities, we conducted the experiments using the lipopolysaccharide (LPS)-induced intestinal damage model. Intestinal epithelial CYP3A activity was assessed by nifedipine oxidation using intestinal epithelial microsomes in rat. Drug efflux by P-gp was tested using digoxin flux with the excised intestine perfusion system in rats. Intraperitoneal injection of LPS (0.3 mg/kg) significantly reduced the intestinal epithelial CYP3A activity by 41% (p < 0.01). In the proximal jejunal segment of the rats treated with LPS, mucosal to serosal flux of digoxin was significantly enhanced compared to that of control (p < 0.05). Efflux of digoxin, which was taken up by intestinal epithelium, to mucosal perfusate was significantly blunted in the jejunum treated with LPS (p < 0.05), which indicates that the LPS treatment reduced the P-gp activity in rat small intestine. These findings suggest that the suppression of CYP3A and P-gp activities may be involved in the mechanism of elevated blood concentrations of cyclosporine and tacrolimus during enteritis-induced diarrhea. To prevent a drug-induced adverse effect, dose of a drug, which is a substrate of CYP3A or P-gp, should be reduced during such an episode.

[Interferon alpha production in the serum of very young infants after viral infections]. / Production d'interféron alpha dans le sérum des très jeunes nourrissons lors d'infections virales.

UNLABELLED: IFN-alpha detection is useful in some clinical circumstances, but its use has never been validated in young infants with viral infections. OBJECTIVE: The authors wanted to determine it there was any difference in the assessment of IFN-alpha production between infants under or over six months of age. PATIENTS AND METHOD: A series of 233 children with identified common viral infections who had been assessed for IFN-alpha production was retrospectively analyzed. The viral infections were enteroviral meningitis (n =103), respiratory syncytial virus infections (n =60), and rotavirus gastroenteritis (n =70). Data collected from the group of infants under six months of age (n =105) was compared to that of the older children (n =128). Qualitative and quantitative values of interferon-alpha were determined for each group. RESULTS: Interferon-alpha was detected in very young infants (81.9% of cases) as often as in the older age group (80.3% of cases), for any of the three viral infections (P =0.3-0.63). The mean level of interferon-alpha production detected was not lower in the youngest group, and even higher in the group under six months of age with enteroviral meningitis. CONCLUSION: Interferon-alpha detection in very young infants is efficient and may be useful to differentiate between viral and bacterial infection particularly when the etiological diagnosis appears uncertain.

Hematologic findings in children with rotavirus-positive and -negative diarrhea.

The authors studied neutropenia in 101 children hospitalized for gastroenteritis between 1 December 2000 and 30 June 2001 and identified children tested for rotavirus by reviewing their laboratory records. Rotavirus-positive and rotavirus-negative subjects did not differ significantly in their white blood cell counts, absolute neutrophil counts, or frequency of neutropenia (defined as an absolute neutrophil count < 1.0 x 10(9)/L), which accompanied 8.6% of rotavirus-positive cases and 9.3% of rotavirus-negative cases of gastroenteritis. The authors conclude that mild neutropenia accompanying diarrhea does not require further evaluation unless it persists or is associated with other factors such as sepsis.

Management of Lithuanian children's acute diarrhoea with Gastrolit solution and dioctahedral smectite.

OBJECTIVE: Acute gastroenteritis represents a major cause of morbidity and mortality worldwide among children, and rehydration treatment has been one of the cornerstones in the management strategy. The natural clay dioctahedral smectite (Smecta) increases intestinal barrier function and is effective against infectious diarrhoea in children. The purpose of this work was to compare the efficacy and tolerance of Lithuanian children's diarrhoea treatment with dioctahedral smectite combined with hypotonic oral rehydration solution (ORS)--Gastrolit--versus Gastrolit alone to establish the influence of Smecta on serum electrolyte balance in young children with diarrhoea and mild or moderate dehydration. METHODS: Smecta combined with ORS (study group) and ORS alone (control group) were evaluated in a multicentre, open, randomized trial in 54 children aged 6-48 months hospitalized for acute diarrhoea (mostly rotavirus aetiology) and signs of mild and moderate dehydration. The main outcomes examined were duration of diarrhoea, fever, number of vomiting episodes, and serum electrolyte balance before and after treatment. RESULTS: The mean duration of diarrhoea was significantly shorter in the study group (42.3 +/- 24.7 h) than in the control group (61.8 +/- 33.9 h). No side effects of Smecta were observed. The changes of sodium, potassium, chloride and calcium concentrations after treatment were minimal and in the normal range. CONCLUSIONS: Smecta significantly reduced the duration of diarrhoea, was safe and well tolerated, and had no impact on the adsorption of electrolytes. Smecta could be used together with ORS in children suffering from acute gastroenteritis (without uncontrollable vomiting) with mild and moderate dehydration.

Plasma nitrate concentrations in children with infectious and noninfectious diarrhea.

BACKGROUND: In patients with intact renal function and low dietary nitrate intake, plasma nitrate concentrations reflect endogenous nitric oxide production and are shown to be increased during inflammatory processes. The aim of this study was to compare plasma nitrate concentrations and hence endogenous nitric oxide production in children with infectious and noninfectious diarrhea and to determine whether plasma nitrate concentrations could serve as a discriminant test between acute and chronic diarrhea in children. METHODS: Three groups of patients were identified: 14 patients with acute gastroenteritis, 13 patients with chronic noninfectious diarrhea, and 14 patients with no evidence of gastrointestinal pathology and no underlying infectious process, who served as control subjects. Plasma nitrate concentrations were determined spectrophotometrically using the Greiss reaction before reduction to nitrite with a copper-coated cadmium column. RESULTS: Mean plasma nitrate concentrations were 405.3 micromol/L +/- 281.6 micromol/L (standard deviation) in patients with infectious diarrhea, 134.7 micromol/L +/- 77.0 micromol/L in patients with chronic diarrhea, and 54.1 micromol/L +/- 20.1 micromol/L in control subjects (F = 42.6, P < 0.0001; analysis of variance). Plasma nitrate concentrations were significantly higher in the infectious diarrhea group compared with the noninfectious diarrhea and control groups (Student-Newman-Keuls test, P < 0.5). CONCLUSIONS: Although an optimal cutoff concentration cannot be defined, plasma nitrate concentrations in excess of 300 micromol/L are suggestive of an infectious process whereas values less than 100 micromol/L are indicative of noninfectious diarrhea.