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Query: UMLS:C0026918 (Mycobacterium)
 52,428 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The presence and extent of encephalopathy were evaluated in 47 patients with AIDS or AIDS-related complex (ARC) by the use of MR imaging. Twenty-nine (62%) of the patients showed some form of white matter disease, exhibited as high signal intensity on T2-weighted images. Focal white matter lesions were seen in 23 (49%) of the patients, while a diffuse white matter process was observed in six patients (13%). Of the 29 patients who had white matter disease on MR scans, 17 (36%) had a suggestion of white matter involvement on an initial CT study. Meanwhile, 12 (26%) of the patients had a normal CT scan on the initial examination. MR findings showed predominant disease in the subinsular and peritrigonal white matter areas. Marked cerebral atrophy was observed in 17 (36%) of 47 patients, cerebellar atrophy in 18 (38%), and brainstem atrophy in seven patients (15%). Pathologic findings showed that toxoplasmosis was present in eight patients (17%), and primary CNS lymphoma was present in three patients (6%). Cryptococcal meningitis was noted in two (4%) of the patients at autopsy, and Mycobacterium tuberculosis was seen in one (2%) of the patients at autopsy. MR imaging has been shown to be a valuable technique for the detection of encephalopathy in AIDS patients.
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PMID:Encephalopathy in AIDS patients: evaluation with MR imaging. 212 67

A longitudinal study with follow up to the end of 1989 was carried out on 23 patients with AIDS who had attended St. James's Hospital, Dublin, by the end of 1987. Until then only 33 cases of AIDS had been reported in Ireland. The patients, all of whom had antibodies to human immunodeficiency virus (HIV), were predominantly male, young (mean age 31.3 years) and belonged about equally to three major risk groups: homosexuals, intravenous drug abusers (IVDA) and haemophiliacs. AIDS was diagnosed because of oesophageal candidiasis (8 cases), Kaposi's sarcoma (4), mycobacterial infection (4), pneumocystis carinii pneumonia (3), toxoplasmosis (2) or encephalopathy (2). Malignant lymphoma and a variety of infections occurred in the course of illness, and neurological involvement developed in 11 patients (48%). Mortality following diagnosis of AIDS was 39% at one year and 64% after two years. Autopsy in 10 of the 16 deaths contributed much to defining the extent and nature of the disease. The demographic pattern, risk group status, survival and range of complications were broadly similar to the pattern of AIDS as seen elsewhere in developed countries. However, compared to the profile of disease reported from the United States, oesophageal candidiasis (52%) and Mycobacterium tuberculosis (22%) were more prominent, pneumocystis carinii pneumonia (39%), Kaposi's sarcoma (22%) and Mycobacterium avium intracellulare (13%) were less frequent and cryptococcal infection was not identified. These regional variations in the frequency of the various complications and particularly the prominence of tuberculosis, probably reflect the interaction of the immunocompromised patient with the local environment and may have important diagnostic and therapeutic implications.
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PMID:The emerging AIDS epidemic in Ireland--clinicopathological findings in 23 early cases. 239 Dec 9

Fifty to ninety percent of pediatric AIDS cases are complicated by neurologic dysfunction. We present a case of a 5-year-old black female with AIDS encephalopathy and Mycobacterium avium intracellulare. Her initial presentation was that of neuroencephalopathy with loss of developmental milestones, pyramidal tract signs, and subsequent evidence of cortical atrophy. Her initial CT scan at the time of frank encephalopathy was normal, whereas 18 months into the clinical course of her encephalopathy, her CT scan of the head demonstrated typical ventricular dilatation and severe cortical atrophy consonant with her clinical picture. She subsequently developed Mycobacterium avium intracellulare documented by gastric aspirate culture and other opportunistic infections including Candida esophagitis. Her neuroencephalopathy plateaued with continued evidence of immune dysfunction and mycobacterium by gastric aspirate, despite triple antibiotic therapy with INH, streptomycin, Pyrazinamide with later addition of Rifampin and final substitution of the investigational congener Rifabutin. AIDS encephalopathy and Mycobacterium intracellulare are discussed in terms of their prognosis and therapy, particularly in view of new reports of the application of AZT and immunoglobulin therapy.
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PMID:Encephalopathy as a presentation of pediatric AIDS: case report. 255 69

Central nervous system (CNS) involvement is very frequently observed in pediatric AIDS. Clinical manifestations include encephalopathy, cognitive deficits, acquired microcephaly, neurological signs, myelopathy, and peripheral neuropathy. Neurological complications can be related to opportunistic viral infections such as encephalitis, atypical aseptic meningitis, progressive multifocal leukoencephalopathy, and myelitis. Nonviral syndromes include: toxoplasmosis, cryptococcal meningitis, candidiasis, Mycobacterium tuberculosis meningitis, and Mycobacterium avium subacute encephalitis. Bacterial infections, tumors, cerebrovascular complications, and peripheral neuropathies are not frequently observed in pediatric AIDS. The most severe complications of HIV infection is encephalopathy resulting from HIV infection of brain tissue. Direct HIV invasion of the CNS has been demonstrated. Clinical features of HIV encephalopathy are classified into three categories: (1) normal neurological findings; (2) static encephalopathy; and (3) progressive encephalopathy. AIDS dementia complex can be differentiated from the predominance of behavioral and cognitive disabilities.
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PMID:Acquired immune deficiency syndrome in childhood. Neurological aspects. 268 79

The acquired immunodeficiency syndrome (AIDS) is a devastating new disease caused by the human immunodeficiency virus (HIV). This retrovirus causes profound immunoincompetence in its infected hosts, who are thereafter susceptible to develop myriad severe and relapsing protozoal, fungal, bacterial, viral, and arthropodal opportunistic infections, as well as unusual malignancies. The more than 50,000 patients who have developed AIDS in the United States have produced a sudden unexpected deluge of diagnostic dilemmas that are stressing laboratories of pathology everywhere. This paper describes the gross and microscopic pathology of the numerous complications in patients infected by HIV: (a) the prodromal AIDS-related complex with persistent generalized lymphadenopathy, (b) lymphoid infiltration of salivary gland and lung, including the complex of lymphoid interstitial pneumonitis-pulmonary lymphoid hyperplasia, (c) extranodal non-Hodgkin's lymphomas, (d) multifocal mucocutaneous and visceral Kaposi's sarcoma, (e) small cell undifferentiated (oat cell) carcinomas, (f) protozoal infections caused by Pneumocystis carinii, Toxoplasma gondii, Acanthamoeba, Cryptosporidium species (sp.), and Isospora belli, (g) the causes of chronic enteritis, (h) mycotic infections caused by Candida sp., Cryptococcus neoformans, Histoplasma capsulatum, Coccidioides immitis, and Sporothrix schenckii, (i) bacterial infections caused by Mycobacterium avium-intracellulare, M. tuberculosis, M. kansasii, Nocardia sp., Listeria monocytogenes, Legionella sp., Treponema pallidum, and others, (j) viral infections caused by cytomegalovirus, herpes simplex and zoster, polyomavirus (progressive multifocal leukoencephalopathy), hepatitis B, molluscum contagiosum, and papillomavirus, (k) oral hairy leukoplakia, (l) subacute encephalopathy, and (m) Norwegian scabies.
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PMID:The pathology of AIDS. 283 78

The diagnostic potential for detection of IgG to Mycobacterium tuberculosis excretory secretory (ES) antigen in childhood pulmonary and extrapulmonary tuberculosis was explored. IgG antibody to M. tuberculosis ES antigen was detected by indirect penicillinase ELISA. Twenty (80%) out of 25 pulmonary tuberculosis cases (clinically diagnosed and/or AFB-positive), five of nine tuberculous pleural effusion cases and only six of 69 cases in the control group were positive for IgG antibody to M. tuberculosis ES antigen. All CSF and sera were positive for IgG antibody in 12 cases of clinically diagnosed tuberculous meningitis (TBM). Out of 35 cases in the control group for TBM, all five cases of pyogenic meningitis but none of the 13 cases of viral encephalitis, five cases of enteric encephalopathy and 12 cases with no CNS infection were positive for anti-tubercular IgG antibody in CSF samples. Only two of them, i.e. one case of pyogenic meningitis and the other with no CNS infection, were positive for antibody in sera. The study demonstrated the potential of this assay in the diagnosis of tuberculosis in children where bacteriological confirmation is very difficult.
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PMID:Immunodiagnosis of childhood pulmonary and extrapulmonary tuberculosis using Mycobacterium tuberculosis ES antigen by penicillinase ELISA. 751 30

The Czech Republic is characterized here as both a low HIV prevalence area (1.64 registered positivity per 10(5) population and 45 AIDS patients notified in the 1986-93 period) and a low tuberculosis prevalence area (mortality rate 0.8, incidence of bacillary pulmonary cases 11.3 per 10(5) population and risk of infection 0.04 in 1990). From 1986 to 1993 a total of 10 cases of mycobacterial infections complicating AIDS or ARC disease were registered in the Czech Republic in 9 male patients aged from 29 to 55, 8 homosexuals, and one woman aged 48. Classical pulmonary tuberculosis caused by M. tuberculosis was diagnosed in one male patient and was controlled by antituberculosis chemotherapy. The remaining mycobacterial infections were caused by the following opportunistic mycobacterial pathogens. (a) M. avium in five individuals, four of them died of a disseminated disease; (b) M. kansasii--in two patients, one died of a disseminated infection; (c) M. xenopi--involved in a fatal generalized CMV, and cryptococcal and mycobacterial infection; (d) M. fortuitum caused a generalized disease in a case of exhaustive multifocal encephalopathy. Authors conclude that under conditions of low prevalence of both HIV and tuberculosis infection the risk to AIDS patients of contracting classical tuberculosis is low. A relatively frequent occurrence of non-tuberculosis mycobacterial disease in AIDS patients afflicted with the impaired immunity is explained by transmission of opportunistic mycobacteria from the environment.
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PMID:Mycobacterial infections in patients with AIDS in a low HIV prevalence area. 769 15

Systemic corticosteroids have been used in the treatment of numerous medical conditions for approximately 50 years. Short-acting products such as hydrocortisone are the least potent. Prednisone and methylprednisolone, which are intermediate-acting products, are four to five times more potent than hydrocortisone. Dexamethasone is a long-acting, systemic corticosteroid; its potency is about 25 times greater than the short-acting products. Corticosteroids reduce the need for hospitalization in patients with croup and decrease morbidity and the incidence of respiratory failure in the treatment of patients with AIDS who have Pneumocystis carinii pneumonia. Other often overlooked indications for corticosteroids are the treatment of hyperthyroid states, including thyroid storm, subacute thyroiditis and ophthalmopathy of Graves' disease. Systemic steroids can be used as adjuvant analgesics in the treatment of neuropathic and cancer-related pain. They may also decrease mortality in patients with severe alcoholic hepatitis and concomitant encephalopathy. Corticosteroids can reduce complications in patients with meningitis caused by Haemophilus influenzae or Mycobacterium tuberculosis.
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PMID:A different look at corticosteroids. 971 98

Cerebral tuberculosis or tuberculosis of the brain manifests predominantly as tuberculous meningitis followed by tuberculoma, tuberculous abscess, and other concomitant forms such as cerebral miliary tuberculosis, tuberculous encephalopathy, tuberculous encephalitis, and tuberculous arteritis. Different forms of cerebral tuberculosis are mainly caused by Mycobacterium tuberculosis and also by non-tuberculous mycobacteria such as M. avium-intracellulare in human immunodeficiency virus-infected persons. Cerebral tuberculosis is diagnosed based on clinical features, cerebrospinal fluid studies combined with radiological images. Early diagnosis, prompt institution of anti-tubercular treatment, and the clinical stage at which the patient presents are important and deciding factors for final outcome. The present review highlights the pathogenesis, recent strides made in diagnosis, including sensitive and specific molecular diagnostic (immunologic and polymerase chain reaction) tests, treatment, and outcome aspects of cerebral tuberculosis.
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PMID:Pathogenesis, diagnosis, treatment, and outcome aspects of cerebral tuberculosis. 1532 98

Bacillus Calmette-Guerin (BCG) intravesical instillation has been adopted in the treatment of patients with superficial bladder cancer. BCG-induced disseminated infection, though rare, has been associated with the histological finding of epithelioid granulomas in different organs, including the liver. We report the case of an adult patient with multi-organ failure, who developed sepsis, acute respiratory failure and acute hepatic failure with encephalopathy whose liver biopsy confirmed the presence of atypical, granulomatous-like lesions. Recovery was observed only after empirical therapy for Mycobacterium bovis with isoniazid, rifampicin, ethambutol and steroids was introduced. This case highlights the importance of a thorough patient assessment in order to exclude other more common causes of hepatic granulomas and to confirm diagnosis. Histological findings may be non-specific when the liver is involved in BCG-induced disseminated infection.
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PMID:Multi-organ failure with atypical liver granulomas following intravesical Bacillus Calmette-Guerin instillation. 2148 39


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