RESUMO
BACKGROUND: Patients with heart failure often have concomitant renal disease which can result in uremic platelet dysfunction. Determining whether uremia has affected platelets by platelet aggregometry can be challenging in these patients since they are often on antiplatelet medications. This study was undertaken to determine if platelet aggregation studies could identify heart failure patients at risk for uremic bleeding prior to cardiac surgery. METHODS: Platelet aggregation studies from three groups were studied and compared: 17 heart failure patients with mild to moderate renal impairment, 17 heart failure patients without renal abnormalities and 17 healthy volunteers. RESULTS: Platelet aggregation was severely impaired in both heart failure groups with and without renal abnormalities compared to healthy controls, and there were no significant differences in platelet aggregation in response to any of the agonists. There was a pan-decrease in platelet aggregation to all agonists in all heart failure patients. CONCLUSION: Platelet aggregometry does not appear to be useful in measuring platelet dysfunction in heart failure patients with mild to moderate renal impairment.
Assuntos
Plaquetas/fisiologia , Insuficiência Cardíaca/complicações , Agregação Plaquetária/fisiologia , Testes de Função Plaquetária/estatística & dados numéricos , Uremia/complicações , Uremia/fisiopatologia , Adulto , Idoso , Estudos de Casos e Controles , Feminino , Insuficiência Cardíaca/cirurgia , Humanos , Masculino , Pessoa de Meia-Idade , Estudos RetrospectivosRESUMO
BACKGROUND: Malnutrition presents a major global health burden. In Egypt, it remains an important issue in children under 5 years especially in rural communities. AIM OF THE STUDY: The aim of the study was to screen 2-5 years old children enrolled from Egyptian hospitals in rural and urban areas for the risk of malnutrition using Screening Tool for Assessment of Malnutrition in Pediatric (STAMP) and to evaluate the effectiveness of nutritional intervention programs. SUBJECTS AND METHODS: This cross-sectional study was conducted on 90 patients recruited from two hospitals in urban and rural Cairo, Dietary history and anthropometric measurements were assessed. Patients at intermediate and severe risk of malnutrition according to STAMP were given tailored nutritional programs. RESULTS: In the rural hospital, 4.4% of the screened children were underweight, 22.2% were marginally underweight, and 73.3% had normal weight. Regarding the urban hospital, 15.6% were marginally underweight, 84.4% had normal weight and no underweight patients. Among the rural group 35.6% were at high risk according to STAMP score results compared to 20% in the urban group. Nevertheless, the only significant differences were the more stunting and higher BMI in rural hospital patients. After nutritional intervention, high-risk category patients decreased in both groups coupled by significant improvement in the anthropometric parameters and nutrition data with no significant differences between them. CONCLUSION: Nutritional education and prompt implementation of nutritional rehabilitation program for malnourished children detected by screening tools result in improvement in their nutritional status disregards their location whether urban or rural.
Assuntos
Transtornos da Nutrição Infantil , Desnutrição , Humanos , Criança , Pré-Escolar , Estudos Transversais , População Rural , Estado Nutricional , Transtornos da Nutrição Infantil/diagnóstico , Hospitais Urbanos , Desnutrição/diagnóstico , Magreza/complicaçõesRESUMO
BACKGROUND AND OBJECTIVES: Children and adolescents with inflammatory bowel disease (IBD) have more extensive and severe disease than adults. Despite a lack of comparative studies, thiopurines are frequently cited as being more efficacious in children. To test this assertion, we compared the efficacy of thiopurines in children with IBD with that in adults matched for disease phenotype. PATIENTS AND METHODS: Fifty paediatric and adult patients with IBD started on a thiopurine were matched for sex, disease type, and extent. Retrospective data were obtained by electronic case note review, and corticosteroid-free clinical remission and tolerance rates at 6 months as well as relapse rates during the subsequent year were recorded. RESULTS: Adverse effects caused discontinuation of thiopurines in 1 of 50 children and 16% (8/50) of adults (P < 0.05). At 6 months, steroid-free remission was achieved in 30% (15/50) of children and 38% (19/50) of adults (P = 0.53). No differences in remission rates were seen according to disease type. At the end of the following year, 73% (11/15) of children and 68% (13/19) of adults remained in remission (P = 1). CONCLUSIONS: Thiopurines are tolerated better by children. When phenotype is matched, there is no difference in the therapeutic response to thiopurines between children and adults with IBD.
Assuntos
Fatores Etários , Doenças Inflamatórias Intestinais/tratamento farmacológico , Purinas/efeitos adversos , Adolescente , Adulto , Idoso , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Purinas/uso terapêutico , Indução de Remissão , Estudos Retrospectivos , Adulto JovemRESUMO
This study aimed to ascertain the value of posters at medical meetings to presenters and delegates. The usefulness of posters to presenters at national and international meetings was evaluated by assessing the numbers of delegates visiting them and the reasons why they visited. Memorability of selected posters was assessed and factors influencing their appeal to expert delegates identified. At both the national and international meetings, very few delegates (< 5%) visited posters. Only a minority read them and fewer asked useful questions. Recall of content was so poor that it prevented identification of factors improving their memorability. Factors increasing posters' visual appeal included their scientific content, pictures/graphs and limited use of words. Few delegates visit posters and those doing so recall little of their content. To engage their audience, researchers should design visually appealing posters by presenting high quality data in pictures or graphs without an excess of words.
Assuntos
Recursos Audiovisuais , Pesquisa Biomédica , Congressos como Assunto , Gastroenterologia , Disseminação de Informação , Feminino , Humanos , Modelos Lineares , Masculino , Estatísticas não Paramétricas , Reino UnidoRESUMO
Dietary fat intake is extremely low in most communities with vitamin A deficiency. However, its role in vitamin A status of pregnant and lactating women is poorly understood. The aim of the study was to examine the effect of supplementing women with fat from mid-/late pregnancy until six months postpartum on their vitamin A status and that of their infants. Women recruited at 5-7 months of gestation were supplemented daily with 20 mL of soybean-oil (n = 248) until six months postpartum or received no supplement (n = 251). Dietary fat intake was assessed by 24-hour dietary recall at enrollment and at 1, 3 and 6 months postpartum. Concentrations of maternal plasma retinol, beta-carotene, and lutein were measured at enrollment and at 1, 3 and 6 months postpartum, and those of infants at six months postpartum. Concentration of breastmilk retinol was measured at 1, 3 and 6 months postpartum. The change in concentration of plasma retinol at three months postpartum compared to pregnancy was significantly higher in the supplemented compared to the control women (+0.04 vs -0.07 micromol/L respectively; p < 0.05). Concentrations of plasma beta-carotene and lutein declined in both the groups during the postpartum period but the decline was significantly less in the supplemented than in the control women at one month (beta-carotene -0.07 vs -0.13 micromol/L, p < 0.05); lutein -0.26 vs -0.49 micromol/L, p < 0.05) and three months (beta-carotene -0.04 vs -0.08 micromol/L, p < 0.05; lutein -0.31 vs -0.47 micromol/L, p < 0.05). Concentration of breastmilk retinol was also significantly greater in the supplemented group at three months postpartum than in the controls (0.68 +/- 0.35 vs 0.55 +/- 0.34 micromol/L respectively, p < 0.03). Concentrations of infants' plasma retinol, beta-carotene, and lutein, measured at six months of age, did not differ between the groups. Fat supplementation during pregnancy and lactation in women with a very low intake of dietary fat has beneficial effects on maternal postpartum vitamin A status.
Assuntos
Gorduras na Dieta/administração & dosagem , Suplementos Nutricionais , Fenômenos Fisiológicos da Nutrição Materna , Estado Nutricional , População Rural , Deficiência de Vitamina A/prevenção & controle , Adulto , Bangladesh , Feminino , Humanos , Lactente , Lactação/sangue , Leite Humano/química , Gravidez , Segundo Trimestre da Gravidez , Terceiro Trimestre da Gravidez , Óleo de Soja/administração & dosagem , Vitamina A/análise , Vitamina A/sangue , Adulto JovemRESUMO
Despite the national vitamin A and antihelminthic prophylaxis programmes, both intestinal geohelminths and subclinical vitamin A deficiency continue to be prevalent among children in developing countries. Studies on potential synergistic effects of vitamin A supplementation and deworming on retinol status have inconsistent results. The purpose of the present study was to investigate the impacts of low-dose beta-carotene supplementation and antihelminthic therapy on serum retinol and beta-carotene concentrations in preschool children of Bangladesh. Two hundred and forty-four children, known to be infected with Ascaris lumbricoides, were randomized into four treatment groups: I-IV. Group I and II received two oral doses of 400 mg of albendazole each, the first dose at baseline and the second dose after four months; Group III and IV received placebo in place of albendazole. In addition, Group I and III received 1.2 mg of beta-carotene powder in capsule daily for six months, and Group II and IV received placebo in place of beta-carotene. Serum retinol and beta-carotene levels were measured before and after six months of the interventions. Serum retinol and beta-carotene increased significantly in Group I where both antihelminthic therapy and daily beta-carotene supplementation were given (p<0.05 and p<0.001 respectively). Antihelminthic therapy alone only improved serum beta-carotene concentration (p<0.0001). Low-dose beta-carotene supplementation, along with an antihelminthic therapy, synergistically improved vitamin A status. This finding has public-health implications for improving vitamin A status of children in developing countries.
Assuntos
Albendazol/uso terapêutico , Anti-Helmínticos/uso terapêutico , Ascaríase/tratamento farmacológico , Ascaris lumbricoides/efeitos dos fármacos , Vitamina A/sangue , beta Caroteno/administração & dosagem , beta Caroteno/sangue , Animais , Bangladesh , Pré-Escolar , Suplementos Nutricionais , Feminino , Humanos , Masculino , PobrezaRESUMO
Arsenic contamination of tubewell water is a major public-health problem in Bangladesh. In the recent years, the use of shallow and deep tubewell water for irrigation and the use of excess amount of cheap fertilizers and pesticides containing cadmium pose a serious threat of contamination of arsenic and cadmium in food. In an exploratory study, arsenic and cadmium were measured in foods from Matlab, a rural area in Bangladesh, that is extensively affected by arsenic and the economy is agriculture-based. Raw and cooked food samples were collected from village homes (households, n=13) and analyzed to quantify concentrations of arsenic and cadmium using atomic absorption spectrophotometry. Washing rice with water before cooking reduced the concentration of arsenic in raw rice by 13-15%. Rice, when cooked with excess water discarded, showed a significant decrease in arsenic concentration compared to that cooked without discarding the water (p<0.001). In contrast, concentration of cadmium did not decrease in cooked rice after discarding water. Cooked rice with discarded water had significantly lower concentration of arsenic compared to raw rice (p=0.002). Raw rice had higher concentration of arsenic compared to raw vegetables (p<0.001); however, no such difference was found for cadmium. Compared to raw vegetables (e.g. arum), concentration of arsenic increased significantly (p=0.024) when cooked with arsenic-contaminated water. Thus, the practice of discarding excess water while cooking rice reduces the concentration of arsenic but not of cadmium in cooked rice. However, water generally not discarded when cooking vegetables to avoid loss of micronutrients consequently retains arsenic. The results suggest that arsenic and cadmium have entered the food-chain of Bangladesh, and the cooking practices influence the concentration of arsenic but not of cadmium in cooked food.
Assuntos
Arsênio/análise , Cádmio/análise , Cadeia Alimentar , Contaminação de Alimentos , Bangladesh , Culinária/métodos , Análise de Alimentos , Contaminação de Alimentos/prevenção & controle , Projetos Piloto , Saúde da População RuralRESUMO
We introduced flocculant-disinfectant water treatment for 12 weeks in 103 households in Bangladesh to assess if drinking water would be chemically and microbiologically improved and the body burden of arsenic reduced. The median concentration of arsenic in tubewell water decreased by 88% after introduction of the flocculant-disinfectant from 136 microg/l at baseline to 16 (p < 0.001). The median concentration of total urinary arsenic decreased 42% from 385 microg/g creatinine at baseline to 225 microg/g creatinine after intervention (p < 0.001). Among 206 post-intervention drinking water samples that were reportedly treated on the date the sample was collected, 99 (48%) lacked residual free chlorine and 100 (49%) were contaminated with thermotolerant coliforms. The flocculant-disinfectant markedly reduced arsenic in drinking water, but treated drinking water was frequently contaminated with fecal organisms. The lesser reduction in urinary arsenic compared to water arsenic and the health consequences of this reduction require further research.
Assuntos
Intoxicação por Arsênico/prevenção & controle , Desinfetantes , Purificação da Água/métodos , Abastecimento de Água/normas , Adolescente , Adulto , Idoso , Arsênio/química , Arsênio/urina , Intoxicação por Arsênico/epidemiologia , Bangladesh/epidemiologia , Cloro/química , Exposição Ambiental/prevenção & controle , Fezes/microbiologia , Feminino , Floculação , Humanos , Pessoa de Meia-Idade , Saúde da População Rural , Microbiologia da Água , Poluentes Químicos da Água/química , Poluentes Químicos da Água/urina , Abastecimento de Água/análise , Adulto JovemRESUMO
Silica nanoparticles (SiO2 NPs) were found to be photocatalytically active for degradation of methyl red dye (MR). The SiO2 NPs and SiO2 NPs doped with silver (and or) gold nanoparticles were prepared. From the transmission electron microscopy (TEM) images the particle size and particle morphology of catalysts were monitored. Moreover, SiO2 NPs doped with silver and gold ions were used as a photocatalyst for degradation of MR. The rate of photocatalytic degradation of MR was found to be increased in the order of SiO2 NPs, SiO2 NPs coated with gold nanoparticles (Au NPs) and silver nanoparticles (Ag NPs), SiO2 NPs coated with Ag NPs, SiO2 NPs coated with Au NPs, Ag+-doped SiO2 NPs, and Au3+-doped SiO2 NPs. The kinetic and mechanism of photocatalytic reaction were studied and accorded well with experimental results.
Assuntos
Compostos Azo , Corantes , Nanopartículas/química , Dióxido de Silício/química , Raios Ultravioleta , Poluentes Químicos da Água , Compostos Azo/química , Compostos Azo/efeitos da radiação , Catálise , Corantes/química , Corantes/efeitos da radiação , Ouro/química , Microscopia Eletrônica de Transmissão , Nanopartículas/ultraestrutura , Tamanho da Partícula , Fotoquímica , Prata/química , Eliminação de Resíduos Líquidos/métodos , Poluentes Químicos da Água/química , Poluentes Químicos da Água/efeitos da radiação , Purificação da Água/métodosRESUMO
Compounds having general formula: [M(FO)(Cl)x(H2O)y]x zH2O, where (M=Mn(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II), FO=folate anion, x=2 or 4, y=2 or 4 and z=0, 1, 2, 3, 5 or 15) were prepared. The obtained compounds were characterized by elemental analysis, infrared as well as electronic spectra, thermogravimetric analysis and the conductivity measurements. The results suggested that all folate complexes were formed by 2:1 molar ratio (metal:folic acid) as a bidentate through both of the two carboxylic groups. The molar conductance measurements proved that the folate complexes are electrolytes. The kinetic thermodynamic parameters such as: E*, DeltaH*, DeltaS* and DeltaG* were estimated from the DTG curves. The antibacterial evaluation of the folic acid and their complexes was also done against some Gram positive/negative bacteria as well as fungi.
Assuntos
Ácido Fólico/síntese química , Metais/química , Temperatura , Antibacterianos/síntese química , Antibacterianos/química , Antibacterianos/farmacologia , Ácidos Carboxílicos/química , Quelantes/química , Elétrons , Ácido Fólico/química , Ácido Fólico/farmacologia , Gravitação , Cinética , Magnetismo , Viabilidade Microbiana/efeitos dos fármacos , Estrutura Molecular , Análise Espectral , EstereoisomerismoRESUMO
A cross-sectional and controlled clinical trial was conducted in under-5 children to compare the effects of supplementation of five micronutrients (vitamin-A, vitamin C, vitamin E, folic acid and zinc) on the morbidity and on the duration of hospital stay in pneumonia. Data were collected from 1150 children. Among them 350 children were excluded for various reasons and finally data from 800 children were analyzed. Among these 800 children 59.00% (475) were male and 41.00% (325) were female. The mean+/-SD age was 6.5+/-5.6 months and 56.25% (450) were infants. The children were divided into two groups-400 in control group and 400 in intervention (case) group. In both the groups, specific treatment was given by ampicillin and gentamycin. In intervention group, five micronutrients were given in 200 children from the day of admission and continued up to discharge. Another 200 children were again divided into 5 sub-groups (40 in each sub-group) and a single micronutrient was given in the same way in each sub-groups. All the subjects were suffering clinically from severe pneumonia and radiologically from bronchopneumonia. Cases and controls were matched by parents' occupation, education level, economic status and family members. All the children were fully vaccinated as per existing EPI schedule of the country, partially breastfed up to six months and after six months weaned by carbohydrate rich diet. All the children were in mild (grade I) PEM according to Gomez's classification. Venous blood was collected for estimation of serum level of five micronutrients from all the samples before starting treatment by standard procedures. The average blood level of all the micronutrients was low. The average duration of hospital staying was 6.75 days in intervention group and 7.75 days in control group (p<0.01). Chest indrawing and fast breathing disappeared earlier in the intervention group (p<0.01) suggesting that supplementation of micronutrients decrease the morbidity and duration of hospital stay of children suffering from pneumonia.
Assuntos
Suplementos Nutricionais , Micronutrientes/uso terapêutico , Pneumonia/terapia , Antibacterianos/uso terapêutico , Bangladesh , Pré-Escolar , Estudos Transversais , Feminino , Humanos , Lactente , Recém-Nascido , Tempo de Internação , Masculino , Resultado do TratamentoRESUMO
We examined the epidemiology of kala-azar and asymptomatic leishmanial infection measured by serologic and leishmanin skin test results in a Bangladeshi community. In a subset, we measured serum retinol, zinc and C-reactive protein (CRP). Kala-azar and seroconversion incidence were 15.6 and 63.1 per 1,000 person-years, respectively. Proximity to a previous kala-azar case increased the likelihood of both kala-azar and asymptomatic infection. Bed net use protected against kala-azar (rate ratio = 0.35, P < 0.01), but not subclinical infection (rate ratio = 1.1, P = 0.82). Kala-azar patients were younger (P < 0.001) and reported lower red meat consumption (P < 0.01) than asymptomatic seropositive individuals. Retinol and zinc levels were lower in current kala-azar patients and those who later developed kala-azar compared with uninfected and asymptomatically infected subjects. The CRP levels were higher in kala-azar patients compared with the other two groups. Low red meat intake and poor zinc and retinol status may characterize a group at higher risk of symptomatic disease.
Assuntos
Doenças Endêmicas/estatística & dados numéricos , Leishmaniose Visceral/epidemiologia , Adulto , Anticorpos Antiprotozoários/análise , Anticorpos Antiprotozoários/metabolismo , Antígenos de Protozoários/metabolismo , Bangladesh/epidemiologia , Proteína C-Reativa/análise , Criança , Pré-Escolar , Humanos , Incidência , Leishmaniose Visceral/diagnóstico , Modelos Logísticos , Distribuição de Poisson , Prevalência , Proteínas de Protozoários/metabolismo , Fatores de Risco , Fatores de Tempo , Vitamina A/sangue , Zinco/sangueRESUMO
There is an urgent need for Bangladesh to identify the arsenic (As) contaminated tubewells (TWs) in order to assess the health risks and initiate appropriate mitigation measures. This will involve testing water in millions of TWs and raising community awareness about the health problems related to chronic As exposure from drinking water. Field test kits offer the only practical tool within the time frame and financial resources available for screening and assessment of the As contaminated TWs as well as their monitoring than that of the laboratory measurement. A comparison of field test kit and laboratory measurements by AAS as "gold standard" for As in water of 12,532 TWs in Matlab Upazila in Bangladesh, indicates that the field kit correctly determined the status of 91% of the As levels compared to the Bangladesh Drinking Water Standard (BDWS) of 50 microg/L, and 87% of the WHO guideline value of 10 microg/L. Nevertheless, due to analytical and human errors during the determination of As by the field test kits, some misclassification of wells is inevitable. Cross-checking of the field test kit results, both by Field Supervisor and by the laboratory analyses reveal considerable discrepancies in the correct screening mainly at As concentration ranges of 10-24.9 microg/L and 50-99.9 microg/L, critical from a public health point of view. The uncertainties of misclassification of these two groups of TWs have severe public health implications due to As exposure from drinking water sources. This can be reduced through proper training of the field personnel, cross verification of the field test kit results with laboratory analyses and further development of the field test kits to determine As at low concentrations.
Assuntos
Arsênio/análise , Monitoramento Ambiental/instrumentação , Poluentes Químicos da Água/análise , Abastecimento de Água/análise , Bangladesh , Monitoramento Ambiental/métodos , Saúde Pública , Reprodutibilidade dos TestesRESUMO
We report the result of treatment of 69 complex clasped thumbs in 39 patients with distal arthrogryposis. The mean age at surgery was 30 months. Surgical reconstruction included skin augmentation of the first web using modified dorsal rotation advancement flap (Abdel-Ghani flap), a la Carte release of tight structures of the first web, and chondrodesis of the thumb metacarpophalangeal joint. The mean follow-up was 4 years. We prefer chondrodesis because of the presence of global instability, abnormal joint structure, abnormal articular surfaces, and inefficient muscles for transfer. Also, chondrodesis shortens the thumb and may alleviate the need for release of deficient palmar skin and lengthening of a short flexor pollicis longus. The Abdel-Ghani flap provides ample skin that gives a wide rounded web. It is a simple procedure with minimal donor site morbidity. Surgical reconstruction significantly improved the cosmetic appearance and function of the thumb. LEVEL OF EVIDENCE: IV.
Assuntos
Anormalidades Múltiplas/cirurgia , Artrogripose/complicações , Procedimentos de Cirurgia Plástica , Polegar/anormalidades , Criança , Pré-Escolar , Feminino , Força da Mão , Humanos , Masculino , Articulação Metacarpofalângica , Amplitude de Movimento Articular , Estudos Retrospectivos , Polegar/cirurgia , Resultado do TratamentoRESUMO
BACKGROUND: Pneumonia and diarrhoea cause much morbidity and mortality in children younger than 5 years. Most deaths occur during infancy and in developing countries. Daily regimens of zinc have been reported to prevent acute lower respiratory tract infection and diarrhoea, and to reduce child mortality. We aimed to examine whether giving zinc weekly could prevent clinical pneumonia and diarrhoea in children younger than 2 years. METHODS: 1665 poor, urban children aged 60 days to 12 months were randomly assigned zinc (70 mg) or placebo orally once weekly for 12 months. Children were assessed every week by field research assistants. Our primary outcomes were the rate of pneumonia and diarrhoea. The rates of other respiratory tract infections were the secondary outcomes. Growth, final serum copper, and final haemoglobin were also measured. Analysis was by intention to treat. FINDINGS: 34 children were excluded before random assignment to treatment group because they had tuberculosis. 809 children were assigned zinc, and 812 placebo. After treatment assignment, 103 children in the treatment group and 44 in the control group withdrew. There were significantly fewer incidents of pneumonia in the zinc group than the control group (199 vs 286; relative risk 0.83, 95% CI 0.73-0.95), and a small but significant effect on incidence of diarrhoea (1881 cases vs 2407; 0.94, 0.88-0.99). There were two deaths in the zinc group and 14 in the placebo group (p=0.013). There were no pneumonia-related deaths in the zinc group, but ten in the placebo group (p=0.013). The zinc group had a small gain in height, but not weight at 10 months compared with the placebo group. Serum copper and haemoglobin concentrations were not adversely affected after 10 months of zinc supplementation. INTERPRETATION: 70 mg of zinc weekly reduces pneumonia and mortality in young children. However, compliance with weekly intake might be problematic outside a research programme.
Assuntos
Diarreia Infantil/prevenção & controle , Suplementos Nutricionais , Pneumonia/prevenção & controle , Zinco/administração & dosagem , Bangladesh/epidemiologia , Diarreia Infantil/epidemiologia , Diarreia Infantil/mortalidade , Feminino , Humanos , Incidência , Lactente , Masculino , Pneumonia/epidemiologia , Pneumonia/mortalidade , Pobreza , PrevalênciaRESUMO
OBJECTIVE: To evaluate the effect of antioxidant Vitamins E and C as adjunct therapy of severe acute lower respiratory infection (ALRI) in children. DESIGN: Randomized double-blind placebo-controlled clinical trial. SETTING: A large childrens' hospital serving the urban poor in Kolkata, India. SUBJECTS: Children aged 2-35 months admitted with severe ALRI. INTERVENTION: In total, 174 children were randomly assigned to receive alpha-tocopherol 200 mg and ascorbic acid 100 mg twice daily or placebo for 5 days. All children received standard treatment for severe ALRI. Outcome measures were: time taken to recover from a very ill status, fever, tachypnoea, and feeding difficulty; and improvement in oxidative stress and immune response indicated by thiobarbituric acid reacting substances (TBARS) and response to skin antigens, respectively. RESULTS: Recovery rate ratios (95% CI) using proportional hazards model were 0.89 (0.64-1.25), 1.01 (0.72-1.41), 0.86 (0.57-1.29), and 1.12 (0.77-1.64) for very ill status, feeding difficulty, fever, and tachypnoea, respectively. TBARS values were high and similar in the two groups at admission, discharge, and at 2 weeks follow-up. Serum alpha-tocopherol significantly increased in treated group at discharge. Immune response to skin antigens were very poor at admission and after 2 weeks, in both groups. CONCLUSION: Infants with severe ALRI failed to benefit from two antioxidant nutrients as adjunct therapy. Severe ALRI in infants may cause cell-mediated immune dysfunction. We need a better understanding of oxidative processes in growing infants to help us better design interventions with antioxidant therapy.
Assuntos
Antioxidantes/uso terapêutico , Ácido Ascórbico/uso terapêutico , Imunidade Celular , Infecções Respiratórias/tratamento farmacológico , Substâncias Reativas com Ácido Tiobarbitúrico/análise , Vitamina E/uso terapêutico , Doença Aguda , Antioxidantes/metabolismo , Ácido Ascórbico/metabolismo , Pré-Escolar , Método Duplo-Cego , Feminino , Humanos , Índia , Lactente , Masculino , Oxirredução , Estresse Oxidativo/efeitos dos fármacos , Modelos de Riscos Proporcionais , Índice de Gravidade de Doença , Resultado do Tratamento , Vitamina E/metabolismoRESUMO
The high prevalence of elevated levels of arsenic in drinking-water in many countries, including Bangladesh, has necessitated the development of reliable and rapid methods for the determination of a wide range of arsenic concentrations in water. A simple hydride generation-atomic absorption spectrometry (HG-AAS) method for the determination of arsenic in the range of microg/L to mg/L concentrations in water is reported here. The method showed linearity over concentrations ranging from 1 to 30 microg/L, but requires dilution of samples with higher concentrations. The detection limit ranged from 0.3 to 0.5 microg/L. Evaluation of the method, using internal quality-control (QC) samples (pooled water samples) and spiked internal QC samples throughout the study, and Standard Reference Material in certain lots, showed good accuracy and precision. Analysis of duplicate water samples at another laboratory also showed good agreement. In total, 13,286 tubewell water samples from Matlab, a rural area in Bangladesh, were analyzed. Thirty-seven percent of the water samples had concentrations below 50 microg/L, 29% below the WHO guideline value of 10 microg/L, and 17% below 1 microg/L. The HG-AAS was found to be a precise, sensitive, and reasonably fast and simple method for analysis of arsenic concentrations in water samples.
Assuntos
Arsênio/análise , Qualidade de Produtos para o Consumidor , Espectrofotometria Atômica/métodos , Água/química , Bangladesh , Ingestão de Líquidos , Água Doce/análise , Humanos , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Água/normasRESUMO
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.
Assuntos
Diarreia Infantil/terapia , Hidratação , Zinco/uso terapêutico , Doença Aguda , Bangladesh/epidemiologia , Peso Corporal , Diarreia Infantil/sangue , Diarreia Infantil/prevenção & controle , Relação Dose-Resposta a Droga , Método Duplo-Cego , Fezes/química , Hospitalização , Humanos , Lactente , Masculino , Placebos , Soluções para Reidratação , Índice de Gravidade de Doença , Fatores de Tempo , Resultado do Tratamento , Urina/química , Zinco/sangue , Zinco/deficiênciaRESUMO
BACKGROUND: Pneumonia is a leading cause of morbidity and mortality in young children. Early reversal of severity signs--chest indrawing, hypoxia, and tachypnoea--improves outcome. We postulated that zinc, an acute phase reactant, would shorten duration of severe pneumonia and time in hospital. METHODS: In a double-blind placebo-controlled clinical trial in Matlab Hospital, Bangladesh, 270 children aged 2-23 months were randomised to receive elemental zinc (20 mg per day) or placebo, plus the hospital's standard antimicrobial management, until discharge. The outcomes were time to cessation of severe pneumonia (no chest indrawing, respiratory rate 50 per min or less, oxygen saturation at least 95% on room air) and discharge from hospital. Discharge was allowed when respiratory rate was 40 per minute or less for 24 consecutive hours while patients were maintained only on oral antibiotics. FINDINGS: The group receiving zinc had reduced duration of severe pneumonia (relative hazard [RH]=0.70, 95% CI 0.51-0.98), including duration of chest indrawing (0.80, 0.61-1.05), respiratory rate more than 50 per min (0.74, 0.57-0.98), and hypoxia (0.79, 0.61-1.04), and overall hospital duration (0.75, 0.57-0.99). The mean reduction is equivalent to 1 hospital day for both severe pneumonia and time in hospital. All effects were greater when children with wheezing were omitted from the analysis. INTERPRETATION: Adjuvant treatment with 20 mg zinc per day accelerates recovery from severe pneumonia in children, and could help reduce antimicrobial resistance by decreasing multiple antibiotic exposures, and lessen complications and deaths where second line drugs are unavailable.
Assuntos
Pneumonia Bacteriana/tratamento farmacológico , Zinco/uso terapêutico , Antibacterianos/administração & dosagem , Método Duplo-Cego , Quimioterapia Combinada , Feminino , Humanos , Lactente , Tempo de Internação , Masculino , Oxigênio/sangue , Pneumonia Bacteriana/sangue , Pneumonia Bacteriana/fisiopatologia , Respiração , Zinco/sangueRESUMO
BACKGROUND: In Bangladesh, as in other developing countries, protein-energy malnutrition is mostprevalent among children during weaning. After weaning, children are often fed cereal-based diluted low-calorie porridge, resulting in growth-faltering. OBJECTIVE: To assess the effect on food intake of adding amylase-rich flour (ARF) from germinated wheat to supplementary food among children in nine rural Community Nutrition Centers under the Bangladesh Integrated Nutrition Project (BINP). METHODS: A total of 166 malnourished children of either sex, aged 6 to 24 months, received one of three diets randomly allocated to the Community Nutrition Centers. The composition of the diets was the same; however, the consistency and calorie density were altered by adding either ARF or water. Thirty-five children received the standard supplementary food of the BINP (S-SF), 65 received supplementaryfood with added ARF (ARF-SF), and 66 received supplementary food with added water (W-SF). The children were studied for six weeks. Results. The mean +/- SD intake of supplementaryfood from a single meal by children completing six weeks on the diets was higher for children receiving ARF-SF (33.91 +/- 8.25 g) than for those receiving S-SF (25.66 +/- 6.73 g) or W-SF (30.26 +/- 8.39g) (p < .05 for both comparisons). The weight of vomited food was significantly higher for children receiving W-SF than for children in the other two groups. Weight gain and increments in length and weight-for-height were higher for children who received ARF-SF than for children in the other two groups, but the differences were not statistically significant. The acceptability ofARF-SF was higher than that of the two other diets. The additional cost of adding 2 g of ARF to the diet was about Taka 0.25 (U.S. dollar 1 = Taka 48). CONCLUSIONS: Addition of ARF to existing standard supplementary food, as used under the BINP program, is a simple and effective means to increase the intake of food by changing its consistency, thus making it easier for malnourished children to ingest.