Thesis (M.S.)--West Virginia University, 2003. / Title from document title page. Document formatted into pages; contains vii, 104 p. Vita. Includes abstract. Includes bibliographical references (p. 68-72).

No description available.

Thesis (M.Med.Sc.)--University of Hong Kong, 1984. / Also available in print.

Thesis (Ph.D.)--Aberdeen University, 2009. / Title from web page (viewed on Aug. 26, 2009). Includes bibliographical references.

Class of 2008 Abstract / Objectives: To examine the utilization of the various laboratory tests in diagnosing iron deficiency anemia and determine the proportion of patients receiving unnecessary iron supplementation. Methods: Included in the descriptive study were 126 adult patients with a diagnosis of iron-deficiency anemia determined by ICD9 codes at the University Medical Center (UMC) in Tucson, AZ. Demographic and clinical characteristics were collected by chart review and analyzed by calculating means, standard deviation, and range for patient’s age, iron dose, and lab values. The study also examined the percentage of each lab value (serum iron, transferrin, transferrin saturation, serum ferritin, and/or hemoglobin/hematocrit) used to diagnosis iron deficiency anemia and the percentage of patients found below common references ranges for each serum iron laboratory test were calculated. Results: The average age of the iron deficiency patient was 55 with an average daily elemental iron dose of 108.1 mg with a standard deviation of 50.0. The majority of the laboratory tests were utilized over 50% of the time, with the exception of transferrin (49.6%), transferrin saturation (44.8%), and ferritin (46.4%). The laboratory test with results below the reference range the least percentage of the time was ferritin at 13.8%. The hematocrit (95.1%), hemoglobin (93.6%), serum iron (92.6%), and transferrin saturation (91.1 %) were below the reference range in a high proportion of the patients. Conclusions: It appears that physicians in a hospital setting are not obtaining or utilizing the correct iron laboratory tests in the diagnosis of iron deficiency anemia, resulting in unnecessary iron supplementation.

Iron deficiency is the most prevalent nutrient deficiency in the world, leading to long-term developmental and health consequences in populations at risk. Also known as prebiotics, non-digestible oligosaccharides such as fructooligosaccharide (FOS), inulin, galactooligosaccharide (GOS) and lactulose resist digestion by gastric acid and pancreatic enzymes in vivo, but are preferentially fermented by beneficial intestinal bacteria once they reach the colon. Prebiotics have been shown to increase the absorption of minerals such as iron from diets, but results from studies reported in the literature at times are contradictory, and mechanisms involved are still unclear. A better understanding of the role of FOS and other prebiotics in iron absorption may lead to new dietary modification strategies to increase intake of iron absorption enhancers in plant-based diets. The objectives of this study were therefore to determine the effects of prolonged FOS, as well as Synergy 1 (a combination of long- and short-chain FOS), inulin, GOS and lactulose supplementation on iron status of anemic rats; and to assess the enhancing effects of FOS on iron absorption and elucidate the regulatory mechanism involved using the Caco-2 cell culture model. In our animal studies, male Sprague-Dawley rats were first fed a low-iron diet for 14 days prior to prebiotics supplementation to achieve an iron-deficient status. Rats receiving the low-iron diet (12 ppm Fe) showed significantly lower non-heme iron concentrations in liver, spleen and kidney, as well as lower hemoglobin level than rats receiving a normal diet (45 ppm Fe), confirming iron-deficiency anemia. At the onset of the feeding trials, anemic rats were further divided into groups with or without supplementation of prebiotics. Prebiotics were provided to the rats by dissolving in water at 5% (w/v). Rats were kept on their respective test diets for 28 or 35 days, and all had free access to food and water during the feeding trials. The results showed significantly higher hemoglobin and non-heme iron levels in anemic rats with FOS or GOS supplementation, suggesting that both FOS and GOS could have positive effects on the iron status of anemic subjects with a low-iron intake. Rat colon contents also showed significant changes in short-chain fatty acid (SCFA) concentrations, presumably due to fermentation of prebiotics by intestinal microflora. Changes in the expression of Duodenal cytochrome b (Dcytb) and Divalent metal transporter 1 (DMT-1) in Caco-2 cells were measured by Western Blot and Real Time PCR. Our results confirmed that Caco-2 cells 14 days post confluence provided a stable research model for gene expression studies related to iron absorption. At low iron level, especially with FOS or SCFA supplementation, Dcytb and DMT-1 expression levels were increased in Caco-2 cells. While at high iron level, expression of Dcytb or DMT-1 was mostly down-regulated. Effects of SCFA were much more pronounced than FOS at different iron concentrations, suggesting that any effects of dietary FOS on improving iron status would require fermentation by the intestinal microflora. Further studies on other prebiotics (e.g., GOS and lactulose) and different combinations of SCFA are warranted.

No description available.

Thesis (Ph.D.)--University of Adelaide, Dept. of Public Health, 2001. / Bibliography: leaves 148-163.

o presente trabalho teve por objetivo verificar a possível associação entre alimentação no primeiro ano de vida e anemia ferropriva. Estudou-se uma amostra de 317 crianças com até 12 meses de idade, matriculadas e freqüentando quatro Centros de Saúde Escola do município de São Paulo. As informações sobre a alimentação foram obtidas pelo método de inquérito recordatório, em entrevista com as mães das crianças, na ocasião da consulta ou da vacinação. A presença de anemia foi verificada pela concentração de hemoglobina, determinada pelo método da cianometahemoglobina. Utilizou-se o critério recomendado pela Organização Mundial de Saúde (OMS) para diagnóstico da anemia, verificando-se a prevalência de 14,5 por cento entre toda a população e 22,4 por cento entre as crianças maiores de 180 dias. As associações entre anemia e duração do aleitamento materno exclusivo, idade de introdução de alimentos não lácteos e freqüência de consumo de alimentos fontes de ferro e/ou potenciadores da sua absorção não foram significantes. A ausência do aleitamento materno, até pelo menos 4 meses, associou-se à anemia. Nessa faixa etária encontraram-se 26,9 por cento de anêmicas entre as crianças que tomavam outros leites e 8,6 por cento entre as que só recebiam leite materno. A anemia não se associou às variáveis sócioeconômicas estudadas: escolaridade do pai, da mãe e renda familiar. / This study was made to find out the possible association between the diet in the first year of life and iron deficiency anemia. A sample of 317 infants aged 0-12 months was studied in four school health centers in the city of São Paulo. The informations about diet were obtained by the recordatory survey method, in interviews with the infant\'s mothers. The presence of anemia was verified by hemoglobin concentration, using the cianometahemoglobin method. The criteria recommended by the World Health Organization (WHO) was utilized for the diagnostic of anemia. The prevalence of 14,5 per cent was found in all the population and 22,4 per cent in infants aged more than 180 days. The associations between anemia and time of exclusively breast-feeding, and age of introduction of other foods and/or eating foods which enhance iron absorption were not significants. The absence of breast-feeding, until at least 4 months, were associated with anemia. In this age were found 26,9 per cent of anemics among infants receiving others milks and 8,6 per cent among those receiving only breast milk. Anemia was not associated with socioeconomic variables: parents education levels and familiar income.

published_or_final_version / Medical Sciences / Master / Master of Medical Sciences