| influence of enteral parasites on the blood vitamin a levels in preschool children orally supplemented with retinol and/or zinc. | a sample of 471 pre-school children who frequented schools and crêches in a poor district of manaus (amazonas), brazil, were randomly submitted to faecal parasitological tests. two-hundred-and-forty children from both sexes between the ages of 3 and 7 years with ascaris lumbricoides and/or giardia lamblia were selected. the objective of the study was to determine the possible influence of these two intestinal parasites and vitamin a and/or zinc supplementation on the serum retinol levels of prim ... | 1991 | 1782925 |
| [cross-sectional study of intestinal parasites and chagas' disease in the municipality of novo airão, state of amazonas, brazil]. | a cross-sectional study was performed on the residents of one in every ten households in the town of novo airão, in the northern meso-region of the state of amazonas, 250 kilometers from manaus by riverboat. a family cluster sample of 89 dwellings was studied. a stool sample was requested from each of the inhabitants for examination using the lutz sedimentation and baermann-moraes-coutinho techniques, and blood was taken by venous puncture for trypanosoma cruzi elisa antibody testing and immunof ... | 1999 | 10502145 |
| intestinal parasitic infection and associated risk factors, among children presenting at outpatient clinics in manaus, amazonas state, brazil. | in a cross-sectional study, the prevalences of intestinal parasitic infection and the associated risk factors were explored among children aged 0-10 years attending outpatient clinics in manaus, the capital city of the north brazilian state of amazonas. data indicating socio-economic level and demographic factors were collected in interviews with the accompanying parent or guardian of each child. parasitic infections were detected by the microscopical examination of faecal samples, while nutriti ... | 2009 | 19825280 |