Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0017536 (giardiasis)
 1,714 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The results of the conventional 5-hour d-xylose absorption test were surveyed in 38 subjects with disease of the jejunal mucosa, giardiasis or bacterial overgrowth, or no small-bowel disorder. The test was in error in 20-40% of cases, depending on the disease category, and the error for the entire group was 30%. We conclude that the test yields little guidance for diagnosis or therapy of clinical problems and is superfluous when a jejunal biopsy can be obtained.
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PMID:Limitations of the usefulness of the d-xylose absorption test. 4 95

Nine of 14 cases of giardiasis and severe malabsorption were found to have numerous bacteria adjacent to the mucosa and within luminal fluid samples from the upper jejunum. Three species of enterobacteria (Klebsiella pneumoniae, Enterobacter cloacae and E. hafniae) were cultured from eight patients and from only one were Bacteroides isolated. Enterobacteria were not cultured from seven of eight patients who had giardiasis but only mild malabsorption (of xylose only) nor from seven patients without malabsorption. Intestinal colonization by enterobacteria may make an important contribution to the development of malabsorption in patients with giardiasis.
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PMID:Bacterial colonization of jejunal mucosa in giardiasis. 63 72

The Weibel graticule was used to assess quantitatively histological changes in proximal jejunal mucosal biopsies from patients with Giardia lamblia infections. Most had malabsorption. A group of patients who had mild abdominal symptoms but no intestinal infection and normal absorption were the controls. There were significant differences in mean surface area (SA) measurements between patients with giardiasis and severe malabsorption and controls (P less than 0.001) and infected patients with normal absorption (P less than 0.05). SA measurements correlated significantly with D-xylose excretion results (r = 0.55; P less than 0.01) and daily facal fat output (r = -0.61; P less than 0.001). Significant correlations between duration of symptoms and SA measurements (r = 0.43; P less than 0.05) and D-xylose excretion (r = 0.43; P less than 0.05) in giardiasis suggest that histological and functional impairment are maximal soon after infection and resolve in time. Treatment with metronidazole or mepacrine was associated with a significant increase in SA (P less than 0.05) in patients with severe malabsorption but there was little change in SA in a similar group of patients who received tetracycline. The Weibel graticule was found to be useful in assessing the severity of histological changes and in following changes after treatment.
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PMID:Quantitative histology in giardiasis. 69 Feb 34

Sixty-three unselected cases of giardiasis, with no evidence of other systemic disease, were screened for evidence of steatorrhoea. No patient had any evidence of protein-energy malnutrition. Seventeen (27%) of the cases had steatorrhoea; three (17-8%) of the 17 patients having steatorrhoea also had D-xylose malabsorption. Vitamin B12 absorption was normal in all. Bacterial culture and qualitative analysis of bile salt in jejunal fluid was carried out in all the 17 cases having steatorrhoea as well as 13 cases with normal absorptive parameters (eight cases of irritable bowel syndrome and five cases of giardia infection) who served as controls. All the patients showing bacterial overgrowth had free bile acids in their duodenal aspirate. Free bile acids could also be detected in jejunal aspirates of five of the seven patients having no bacterial overgrowth. Two control cases of giardia infection with normal small bowel function and sterile duodenal aspirate showed evidence of bile salt deconjugation. The significance of these findings is discussed in relation to the pathogenesis of steatorrhoea in patients with giardiasis. The possible role of giardia in bile salt deconjugation is suggested.
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PMID:Mechanism of malabsorption in giardiasis: a study of bacterial flora and bile salt deconjugation in upper jejunum. 85 75

Malabsorption was present in 29 of 40 symptomatic patients with giardiasis. Twenty-three had impaired D-xylose absorption; in 20 vitamin B12 absorption was low, and 15 patients had steatorrhoea. More severe malabsorption was associated with more marked histological abnormalities. Metronidazole, 2-0 g as a single daily dose on three successive days, produced a parasitological cure rate of 91%. In contrast, the standard course of mepacrine, 100 mg thrice daily for 10 days, eradicated the parasite in only 63% of patients. Improvements in absorption and jejunal morphology followed anti-giardial treatment. Tetracycline in eight patients failed to eradicate the parasite, intestinal absorption was unaltered, and histological appearances of the jejunal mucosa often deteriorated.
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PMID:Giardiasis: clinical and therapeutic aspects. 87 19

In order to investigate the intestinal absorption in relation to parasitic diseases, 106 children were studied using the xylose test. All of them were attending a primary school. The height and weight were recorded, and the hemoblobin and hematocrit were estimated in each one. The examination of the stools shown one or more parasites in 57.6 per cent specimens. The E. histolytica, Hymenolepis nana and A. lumbricoides, were identified in 22.6, 21.7 and 20.7 per cent children, respectively; G lamblia was found in 10.4 per cent. Only the children with Giardia had a statistical difference in the absorption of xylose, with respect to those without parasites. At the same time height was low in comparison to a group of children with similar age and sex, selected among the 45 without parasitic diseases. Findings are discussed according to the pathogenic mechanism involved in giardiasis. Emphasis is done in the interplay of malnutrition and G. lamblia.
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PMID:[Absorption of D-xylose in intestinal parasitic diseases]. 121 96

The investigation was carried out with the purpose of studying the capacity to absorb d-xylose in children with G. lamblia establishing also, whether or not their height was reduced. The study is included 25 school age children with giardiasis, pairing them according to sex and age with another 25 without intestinal parasitosis.
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PMID:[Height of children with G. lamblia and there capacity to absorb d-xylose]. 125 9

During a six-year period, 29 children (aged 0.7-13.5 years, mean 3.3 years) suffering from chronic diarrhoea due to giardiasis were studied. The incidence of this illness was 81 per 1,000,000 children aged 0- < 7 years per year. According to growth charts, relative height and weight of the patients decreased significantly (approximately 0.5 SD) from before the onset of diarrhoea to the time of diagnosis and subsequently increased up to the end of catch-up growth. Small intestinal mucosal specimens were studied. Two patients had severe villous atrophy, 8 moderate abnormalities, 6 only light changes and 13 biopsies were normal. D-xylose or lactose malabsorption was detected in 25% of the patients. The lactose malabsorption was due to hereditary low lactase levels. None of the patients with a Danish ethnic background showed lactose malabsorption. D-xylose absorption and the relative weight loss of the patients correlated with the degree of mucosal damage. Patients with persistent diarrhoea (n = 19) were younger and had a shorter duration of diarrhoeal illness and a more significant weight reduction than those with intermittent diarrhoea (n = 10). However, the age at onset of symptoms was similar in the two groups (medians 1.3 years). Seven patients contracted the disease abroad. They all developed persistent diarrhoea and had a more severe course of the illness than those who acquired the disease in Denmark.
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PMID:Giardiasis causing chronic diarrhoea in suburban Copenhagen: incidence, physical growth, clinical symptoms and small intestinal abnormality. 146 10

Iron status, iron absorption, and intestinal blood loss were studied in 199 children undergoing diagnostic evaluation for suspected malabsorption. Evaluation of iron status included hematological indices, serum ferritin, and transferrin saturation. Iron absorption was assessed by the increment of serum iron after an oral iron load. Iron deficiency was common among patients affected by malabsorptive states, such as celiac disease (84%), cow's milk intolerance (76%), Crohn's disease (72%), and giardiasis (64%), whereas it was less common among patients with postinfectious enteritis (41%) and chronic nonspecific diarrhea (11%). Intestinal blood loss was seen only in patients with Crohn's disease and cow's milk intolerance, irrespective of iron nutritional status. On the other hand, iron malabsorption was very common, affecting 85-95% of the iron-deficient patients in all diagnostic groups, except in chronic nonspecific diarrhea. Iron malabsorption was less common among patients with adequate iron nutritional status than in those with iron deficiency. Iron malabsorption appears to play a major role in the pathogenesis of iron deficiency in patients with malabsorption. The iron absorption test shows greater sensitivity as a screening test for upper intestinal malabsorption than the D-xylose absorption test.
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PMID:Iron absorption and iron deficiency in infants and children with gastrointestinal diseases. 157 7

Twenty patients (18 M, 2 F; age 16-32 yrs) with symptomatic giardiasis were treated with tinidazole: ten each with a dose of 150 mg twice daily for 7 days, and a single dose of 2 g (50 mg/kg). Stool examination by formalin-ether concentration method was carried out before and one month after treatment. Cure was defined as absence of G lamblia in the stools. Fecal fat excretion (100 g load) and D-xylose absorption (5 g load) were measured before treatment and, if abnormal, repeated one month after treatment. Gut transit time was measured before and one month after treatment by giving radio-opaque beads orally and following their progress fluoroscopically to complete elimination. Parasitologically, all 20 patients were cured. Clinically, there was marked to complete relief of symptoms. Concomitantly, there was significant (p less than 0.01) reduction in fecal fat excretion, improvement in D-xylose absorption, and increase in gut transit time.
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PMID:Efficacy of tinidazole (Fasigyn) in giardiasis by parasitologic, biochemical, and gut transit studies. 270 40


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