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Filter by:Helicobacter pylori is recognized as a major gastrointestinal pathogen in developing countries. This microorganism infects up to 60% of children less than five years in those countries and is strongly associated with chronic gastritis and peptic ulcer disease in children and adults. The progression of gastritis to atrophy often leads to decreased gastric acid output, which is a well-known risk factor for anemia. Gastric acid is essential for increasing the bioavailability and absorption of non-heme dietary iron, the most important source of iron in developing countries. Numerous reports suggest that iron malabsorption secondary to low gastric acid output is a problem in developing world countries. It has been further observed that iron deficiency anemia is resistant to iron therapy particularly in these countries. In a recently completed study we observed an association of anaemia with H. pylori infection. We hypothesize that the poor bioavailability of iron in these countries could be related to H. pylori -induced low gastric acid output and we propose to investigate the role of H. pylori infection as a cause of anemia and treatment failure of iron supplementation in Bangladesh. A prospective, randomized, double-blind, placebo-controlled field trial is proposed among four groups ( 65 each) of H. Pylori infected children of 2-5 years of age with iron deficiency anemia. The children will be assigned to one of the four therapies: antibiotics alone (for H. Pylori eradication), antibiotic plus iron therapy, iron therapy alone, or placebo. Hemoglobin concentration, serum ferritin concentration, and transferrin receptor will be measured before and at 1 and 3 month after the intervention. We also propose a complementary study in an additional 20 children with H. Pylori infection and iron deficiency anemia to assess iron absorption with application of double stable isotopes. The change in hematological parameters will also be compared among the groups before and after the therapy. The results of this study are expected to have implications in the prevention and treatment of iron deficiency anemia in developing countries.
Sputum specimens will be obtained from children < 2 years of age and processed by different mode for the HMPV, RSV, Pertussis, Influenza A, B, Parainfluenza 1,2,3, Adenovirus. Clinical and epidemiological data will also be obtained.
We conducted a longitudinal study to assess the immunogenicity of standard-titer measles vaccine in HIV-infected and uninfected Zambian children. The study hypothesis was that HIV-infected children would have higher rates of primary and secondary measles vaccine failure compared to uninfected children, contributing to decreased levels of population immunity to measles and facilitating measles virus transmission in regions of high HIV prevalence.
In children with chronic kidney disease, progression to end-stage renal failure is associated with high patient morbidity and poor quality of life. In adults, inhibition of the renin angiotensin system (RAS) slows down the rate of renal failure progression. This concept is as yet unproven in children, in whom chronic renal failure (CRF) is more commonly due to hypo/dysplastic malformations than to acquired glomerulopathies as typical for adult chronic kidney disease. The current project aims at assessing the genetic and molecular mechanisms and cardiovascular consequences of progressive CRF and to develop a strategy of pharmacological renoprotection in children.