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

The absorption of rifampin, isoniazid, and D-xylose in patients with human immunodeficiency virus (HIV) infection and diarrhea, in patients with HIV infection and tuberculosis (TB), in patients with pulmonary TB alone, and in healthy subjects was studied. Percentage of dose of the drugs, their metabolites, and D-xylose excreted in urine were calculated. A significant reduction in the absorption of drugs and D-xylose in both the HIV infection/diarrhea and HIV infection/TB groups was observed (P<.05), and the correlation between them was significant. Our results indicate that patients with HIV infection and diarrhea and those with HIV infection and TB have malabsorption of rifampin and isoniazid.
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PMID:Malabsorption of rifampin and isoniazid in HIV-infected patients with and without tuberculosis. 1469 62

A case series of six patients with HIV and Mycobacterium tuberculosis co-infection is presented. All patients were overseas-born and in all but one there was profound immunodeficiency. We recommend HIV screening of all cases of M. tuberculosis and a high degree of suspicion of tuberculosis in immigrants with HIV infection from endemic areas. Management problems included delayed diagnosis, rapid progression, paradoxical reactions and requirement for surgical intervention in three patients. Therapeutic complications included possible drug malabsorption, adverse events and drug interactions. M. tuberculosis was fully drug sensitive in all cases.
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PMID:HIV and tuberculosis co-infection in south-western Sydney: experience from a case series. 1508 93

Tuberculosis can involve any part of the gastrointestinal tract and is the sixth most frequent site of extrapulmonary involvement. Both the incidence and severity of abdominal tuberculosis are expected to increase with increasing incidence of HIV infection. Tuberculosis bacteria reach the gastrointestinal tract via haematogenous spread, ingestion of infected sputum, or direct spread from infected contiguous lymph nodes and fallopian tubes. The gross pathology is characterized by transverse ulcers, fibrosis, thickening and stricturing of the bowel wall, enlarged and matted mesenteric lymph nodes, omental thickening, and peritoneal tubercles. Peritoneal tuberculosis occurs in three forms : wet type with ascitis, dry type with adhesions, and fibrotic type with omental thickening and loculated ascites. The most common site of involvement of the gastrointestinal tuberculosis is the ileocaecal region. Ileocaecal and small bowel tuberculosis presents with a palpable mass in the right lower quadrant and/or complications of obstruction, perforation or malabsorption especially in the presence of stricture. Rare clinical presentations include dysphagia, odynophagia and a mid oesophageal ulcer due to oesophageal tuberculosis, dyspepsia and gastric outlet obstruction due to gastroduodenal tuberculosis, lower abdominal pain and haematochezia due to colonic tuberculosis, and annular rectal stricture and multiple perianal fistulae due to rectal and anal involvement. Chest X-rays show evidence of concomitant pulmonary lesions in less than 25 per cent of cases. Useful modalities for investigating a suspected case include small bowel barium meal, barium enema, ultrasonography, computed tomographic scan and colonoscopy. Ascitic fluid examination reveals straw coloured fluid with high protein, serum ascitis albumin gradient less than 1.1 g/dl, predominantly lymphocytic cells, and adenosine deaminase levels above 36 U/l. Laparoscopy is a very useful investigation in doubtful cases. Management is with conventional antitubercular therapy for at least 6 months. The recommended surgical procedures today are conservative and a period of preoperative drug therapy is controversial.
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PMID:Abdominal tuberculosis. 1552 Apr 84

Human immunodeficiency virus (HIV) infection is the most powerful known risk factor for progression from latent infection with Mycobacterium tuberculosis to active tuberculosis (TB) disease. The worldwide HIV epidemic has affected TB in every aspect: immunopathology, epidemiology, diagnosis, treatment, and prevention. Of the 42 million people infected with HIV worldwide, more than a quarter of them are also infected with TB, and most live in countries with limited resources for health care in Africa and Asia. This chapter emphasizes HIV-associated TB in resource-limited settings. TB-infected persons with HIV-associated immunosuppression progress to TB disease at a rate of up to 10% per year. Standard TB diagnostic tools have diminished sensitivity in HIV co-infected cases. Standard TB treatment regimens may be less effective, particularly those that do not use a rifamycin throughout. Treatment is further complicated by toxicity, malabsorption, drug-drug interactions and immune reconstitution paradoxical reactions. TB control in the United States was destabilized in part by the HIV epidemic in the early 1990s; massive political will and resources were required to rebuild the public health infrastructure. Africa, Asia, and potentially the former Soviet Union are facing even greater destabilization of TB control due to the dual burden of disease and limited resources. An international response has been initiated but will require even greater political will and resources.
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PMID:Tuberculosis and HIV/AIDS: epidemiological and clinical aspects (world perspective). 1608 74

The objective of this study was to evaluate an algorithm for the management of children with persistent/chronic diarrhea at a community level hospital. The study was carried out in the pediatric OPD of a 150 bed trust hospital catering to children from poor, rural and urban slums. Fifty clinically stable children (6 months-5 years old, mean = 19.7 months) with persistent or chronic diarrhea refusing admission, being managed on an outpatient basis, were enrolled prospectively. A detailed history and physical examination were done for each child to ascertain the cause of diarrhea. They were managed using a pre-tested simplified algorithm and monitored for symptom improvement using a questionnaire 15 days, 1 month and 3 months after initiation of therapy. The average cost for treatment of each child was also calculated. Twenty-one (42%) children had persistent diarrhea. Seven (14%) infants with a typical history of lactose malabsorption responded to a trial of WHO feeding protocols or lactose/sucrose free milk. Four (8%) infants had chronic non-specific diarrhea. A total of 71.8% (28/39) of children were treated satisfactorily with albendazole or metronidazole and Cotrimaxazole along with hematinics and multivitamins. Three (6%) children were diagnosed with abdominal tuberculosis. Four (8%) had raised anti-tissue tranglutaminase antibodies (age 18-34 months). The algorithm used was successful in managing all the children with chronic diarrhea. The average cost per managed case was US$10. Further, multi-center evaluations of similar algorithms are needed to validate the observations in the present study.
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PMID:Evaluation of an algorithm for persistent/ chronic diarrhea in children at a community hospital adjoining slums in Agra, north India. 1712 Sep 71

Malabsorption is an important clinical problem both in visitors to the tropics and in native residents of tropical countries. Infections of the small intestine are the most important cause of tropical malabsorption. Protozoal infections cause malabsorption in immunocompetent hosts, but do so more commonly in the setting of immune deficiency. Helminth infections occasionally cause malabsorption or protein-losing enteropathy. Intestinal tuberculosis, chronic pancreatitis and small-bowel bacterial overgrowth are important causes of tropical malabsorption. In recent years, inflammatory bowel disease and coeliac disease have become major causes of malabsorption in the tropics. Sporadic tropical sprue is still an important cause of malabsorption in adults and in children in South Asia. Investigations to exclude specific infective, immunological or inflammatory causes are important before considering tropical sprue as a diagnosis. This article briefly reviews the management of tropical sprue and presents an algorithm for its investigation and management.
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PMID:Tropical malabsorption. 1714 98

The clinical utility of therapeutic drug monitoring in tuberculosis has not been adequately evaluated by controlled clinical trials. To examine the relationship between slow culture conversion and peak plasma rifampicin level (Cmax-rfm) in a case-control study, patients with persistence of positive sputum smear despite at least 8 weeks of directly observed treatment with standard pyrazinamide-containing regimens were enrolled prospectively in government chest clinics from 16 December 2005 to 15 November 2006. Patients with multidrug-resistant tuberculosis, human immunodeficiency virus infection, or poor treatment adherence were excluded. Cases referred to patients with persistence of positive culture whereas controls had negative culture despite positive smear. Blood was checked at 2 and 4 hours post-dosing to capture Cmax-rfm. A cohort of 88 patients was identified. After excluding 16 patients, there were 36 controls and 36 cases. None had symptoms of malabsorption. Cmax-rfm was below 6 mg/l among 47% of controls and 44% of cases. Univariate and multiple logistic regression analyses showed no significant association between slow culture conversion and Cmax-rfm after logarithmic transformation. Thus, there is probably no association between Cmax-rfm and slow culture conversion.
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PMID:Peak plasma rifampicin level in tuberculosis patients with slow culture conversion. 1821 60

In France, tuberculosis (TB) is still a health issue among underprivileged people and immigrants. We report a case of disseminated tuberculosis with intestinal involvement causing ill absorption and thus, making oral treatment impossible. Intestinal TB is often underrated and yet, malabsorption may lead to treatment failure or to developing antibiotic resistance. This type of tuberculosis must be systematically investigated when assessing the damage caused by tuberculosis and, more particularly, if there is any abdominal pain as well as clinical and biological signs of malabsorption. Parenteral antibiotherapy and nutrition must be systematically discussed.
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PMID:[Gastro-intestinal tract tuberculosis: a little documented form of a too well-known infection]. 1828 76

Rifampin is a key component of standard short-course first-line therapy against Mycobacterium tuberculosis (MTB). Rifampin monoresistant MTB, previously a rare phenomenon, is now being reported at increasing rates worldwide. We report a mutation in the rpoB region leading to low level rifampin monoresistance in a cluster of HIV-positive patients. All rifampin monoresistant isolates identified from 2004 to 2006 underwent susceptibility confirmation, sequencing of rpoB and genotyping. Three patients were found to have a previously undocumented 3 base pair insertion at codon 525 in the rpoB region. The earliest initial case was infected with fully susceptible MTB. Disease relapse occurred 7 months later with a genotypically identical MTB isolate, showing acquired rifampin monoresistance. MTB isolates from 2 subsequent patients showed primary rifampin monoresistance with an identical genotype to the index case. Patients with rifampin monoresistant MTB tend to have poorer outcomes than those with fully susceptible strains. Risk factors for the development of rifampin monoresistance include co-morbid HIV infection and previously treated tuberculosis. HIV infection has been associated with malabsorption of anti-tuberculous medications leading to sub-therapeutic levels of administered drugs. These factors may have played a role in the development of this previously undocumented mutation.
Tuberculosis (Edinb) 2010 Mar
PMID:A mutation in Mycobacterium tuberculosis rpoB gene confers rifampin resistance in three HIV-TB cases. 2009 12

Malnutrition and tuberculosis are both problems of considerable magnitude in most of the underdeveloped regions of the world. These two problems tend to interact with each other. Tuberculosis mortality rates in different economic groups in a community tend to vary inversely with their economic levels. Similarly, nutritional status is significantly lower in patients with active tuberculosis compared with healthy controls. Malnutrition can lead to secondary immunodeficiency that increases the host's susceptibility to infection. In patients with tuberculosis, it leads to reduction in appetite, nutrient malabsorption, micronutrient malabsorption, and altered metabolism leading to wasting. Both, protein-energy malnutrition and micronutrients deficiencies increase the risk of tuberculosis. It has been found that malnourished tuberculosis patients have delayed recovery and higher mortality rates than well-nourished patients. Nutritional status of patients improves during tuberculosis chemotherapy. High prevalence of human immunodeficiency (HIV) infection in the underdeveloped countries further aggravates the problem of malnutrition and tuberculosis. Effect of malnutrition on childhood tuberculosis and tuberculin skin test are other important considerations. Nutritional supplementation may represent a novel approach for fast recovery in tuberculosis patients. In addition, raising nutritional status of population may prove to be an effective measure to control tuberculosis in underdeveloped areas of world.
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PMID:Tuberculosis and nutrition. 2016 88


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