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Query: UMLS:C0024523 (malabsorption)
 7,319 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Intestinal immune responses are adapted to function at external mucosal surfaces. Specialized forms of antibody, secretory immunoglobulin A (IgA) and immunoglobulin M (IgM), provid humoral immunity but little is known of local cell mediated immune reactions. Antigens in the intestinal lumen gain preferential access via Peyer's patches in which sensitised lymphocytes proliferate before entering the lymphatic system. These lymphoblasts return to the intestinal mucosa via the bloodstream to provide predominantly IgA antibody responses. Secretory IgA antibody can neutralize viruses, bacteria and toxins, and appears to block the entry of some food antigens into the lamina propria. Disturbances of intestinal immunity may result in malabsorption. Immunodeficiency states are often associated with malabsorption due to Giardia lamblia infestation. In alpha chain disease there is a malignant expansion of plasma cells in the intestinal mucosa which secrete an abnormal heavy chain fragment of IgA. Arthus type hypersensitivity reactions to milk proteins and gluten may contribute to the mucosal injury in patients suffering from milk allergy and coeliac disease.
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PMID:An overview of intestinal immunity and malabsorption. 11 6

Forty adult patients having intestinal infestation with giardia or with parasitic associations, such as giardia-strongiloides, giardia-taenia solium, were subjected to morphological explorations, iron and vitamin B12 absorption tests, steatorrhea assay and serological tests, before treatment as well as six months and one year after eradication of the infection. On admittance, jejunal morphological lesions were noted only in 15 cases especially in associated infestation, iron depletion in six patients, vitamin B12 malabsorption in five patients and steatorrhea only in two cases. After the lapse of six months and one year, respectively, all the tests ranged within normal values, and the jejunal morphological aspect improved significantly indicating the pathogenetic role of intestinal parasites in the development of selective malabsorption.
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PMID:Absorption studies in patients with parasitic infestation of the small intestine, before and after treatment. 94 94

Giardia lamblia infestation can cause severe diarrhea and malabsorption, and the diagnosis is usually made by identification of cysts in the feces, but small intestinal biopsy or smears may be required. A wide spectrum of roentgen changes may be seen. In patients with a normal immune status, the small bowel is normal or shows an inflammatory bowel disease pattern. Eradication of the parasite reverses these changes. In some patients with IgA deficiency, nodular lymphoid hyperplasia occurs, and this is usually not reversible. Other patients with hypogammaglobulinemia or dysgammaglobulinemia and giardiasis may show a sprue pattern. This pattern most often persists after eradication of the parasite. Although the triad of giardiasis, IgA deficiency, and nodular lymphoid hyperplasia has a particularly high association, these, together with diarrhea, malabsorption, and various altered immune states may occur in any combination.
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PMID:Current perspectives on giardiasis. 110 21

We present 4 cases of common variable immunodeficiency with main digestive clinical manifestations. In all four cases chronic diarrhea with intestinal malabsorption predominated, as well as the presence lymphoid nodular hyperplasia; in one case Giardia infestation could be identified; one patient also presented chronic pancreatitis, or recurrent aphthous stomatitis and active chronic hepatitis; sideroblastic anemia could be observed in another patient. All patients had favorable evolution during follow-up which lasted at least 14 months in substitutive treatment with immunoglobulins. One of our patients presented an elevated number of suppressor T lymphocytes, with inversion of the T helper/T suppressor ratio which improved with cimetidine treatment.
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PMID:[Digestive manifestations of common variable immunodeficiency]. 178 May 14

A case is described concerning an adult male whose work create a risk for infestation by Giardia. The patient had a long history of diarrhea with malabsorption which was resistant to the common therapies. Only after a EGDS examination the diagnostic possibility of infestation by parasites could be proposed; this was confirmed by means of ultrastructural examination of biopsy material. The Authors suggest that in case of inexplicable malabsorption and/or chronic diarrhea, one must always take into consideration in differential diagnosis the possibility of an infestation by Giardia especially when there is a history which could be suggestive for such an infestation (immunodeficiency, homosexuality, frequent trips to foreign countries).
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PMID:[Clinical, histological and ultrastructural study of a case of giardiasis]. 179 8

Breath-test was performed for diagnosis of lactose malabsorption in 50 Gabonese children of normal nutritional status, aged 5 to 15 years, with parasites in stools, but without diarrhoea or digestive symptoms. Control group was unparasitized and consisted of 17 children and 18 young adults living in the same area. Parasites discovered by stool examination were Ascaris lumbricoides in 76% of parasitized children, Trichuris trichiura in 58%, Giardia in 24%, Entamoeba histolytica in 20%, Schistosoma intercalatum in 16% and Necator Americanus in 14%. Children were given a 10 g lactose load and adults 20 g. Lactose malabsorption was discovered in 64% of parasitized patients and in 63% of unparasitized. Ten of 12 (83.3%) of Giardia infected children had a lactose malabsorption (no significant difference). These data show that decrease of lactase activity in African children is not related to the presence or to the importance of intestinal parasitism, except for Giardia infestation, if nutritional status is normal.
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PMID:[Intestinal parasites and lactose malabsorption]. 207 8

Lymphocytic-plasmacytic enteritis (LPE) was diagnosed by intestinal biopsy in 24 dogs with chronic small intestinal diarrhea. Vomiting, weight loss, and reduced appetite were frequent. Breed predispositions were not documented, although four patients were German Shepherd dogs. Hypoproteinemia, hypoalbuminemia, and hypoglobulinemia were common and most likely a result of protein-losing enteropathy. Other biochemical abnormalities were uncommon. Intestinal malabsorption was common. Neutrophilia (sometimes with increased band neutrophils), monocytosis, lymphopenia, and eosinopenia were the most consistent hematologic abnormalities. The severity of the lymphocytic-plasmacytic infiltration was not significantly different (P greater than 0.05) between regions of small intestine. However, the severity of cellular infiltration often varied among different regions of small intestine in the same dog. Changes in villous architecture and lacteal dilation were common. Intestinal nematode infestation was diagnosed in five dogs, and pancreatic exocrine insufficiency was diagnosed in one dog. In the remaining 18 dogs, besides LPE, no other associated or concurrent intestinal disease was diagnosed.
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PMID:Lymphocytic-plasmacytic enteritis in 24 dogs. 234 21

Multifactorial malnutrition is common in alcoholic cirrhosis. We report a case dominated by Kwashiorkor due to malabsorption related to infestation with Giardia Lamblia. Malnutrition deserves a complete investigation in order to detect treatable causes.
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PMID:[Kwashiorkor in an adult with alcoholic hepatic cirrhosis]. 262 57

A patient presented with hematological evidence of vitamin B12 deficiency. The Schilling test performed suggested intestinal malabsorption and further investigation revealed heavy infestation with Giardia lamblia. Specific treatment of the giardiasis with tinidazole resulted in correction of the abnormalities in vitamin B12 absorption. These findings, together with the absence of other causes of vitamin B12 deficiency, suggest that giardiasis should be considered as a cause of vitamin B12 deficiency.
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PMID:Giardia infection causes vitamin B12 deficiency. 345 51

Jejunal biopsy and hydrogen breath test were performed in 57 children, 34 having coeliac disease and 23 with other forms of malabsorption. In children affected by coeliac disease there was a gradually increasing incidence of positive findings with the H2 breath test as villous damage progressed. In the group of subtotal villous atrophy age dependence was also observed, the majority of positive results occurring below three years of age. In the non-coeliac group the most frequent cause of the positive finding was Giardia lamblia infestation. Among 27 cases with lactose malabsorption confirmed by a positive hydrogen breath test only 11 had diarrhoea. The test proved to be useful in differentiating between the contaminated intestine syndrome and malabsorption due to reduced absorptive surface.
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PMID:Hydrogen breath test in small intestinal malabsorption. 362 Jan 96


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