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Query: UMLS:C0001175 (AIDS)
 120,706 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

As the prevalence of tuberculosis has decreased, diseases due to nontuberculous mycobacteria have assumed a greater importance, and the common occurrence of disseminated M. avium complex disease in AIDS patients has stimulated interest in these organisms. Skin test surveys indicate that infection by these mycobacteria is common, but disease is infrequent, with an estimated prevalence in the United States of approximately 2 per 100,000. The most common forms of disease are chronic pulmonary disease resembling tuberculosis, benign cervical adenopathy in children, skin and soft-tissue infection, and disseminated disease in immunocompromised persons. Recent studies have increased our understanding of the ecology of these organisms, which are found in water, soil, and aerosols. However, much remains to be learned about transmission of infection and pathogenesis of disease. Increased understanding in these areas will be important in the prevention of nosocomially acquired disease and disseminated disease in immunocompromised patients.
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PMID:The epidemiology of nontuberculous mycobacterial disease. 267 49

Clinical studies using 31P and 1H MRS with a whole body 2.0 T MRI/MRS system are described. In most cases, techniques to quantitate absolute molar concentrations of metabolites in various organs were used. In the brain, AIDS, chronic stroke, and white matter lesions were associated with alterations of brain 31P metabolites. Epilepsy was associated with increased pH in the seizure focus. In the heart, dilated cardiomyopathy was associated with increased PDE/ATP while PCr/ATP was unchanged. In the liver, alcoholic hepatitis and cirrhosis were associated with diminished hepatic ATP while alcoholic hepatitis had increased pH and cirrhosis had decreased pH. This allowed differentiation of normal liver, alcoholic hepatitis, and alcoholic cirrhosis without biopsy. In the prostate, malignancy was associated with increased PME/ATP and decreased PCr/ATP. The PME/PCr was greatly increased in malignant prostate with no overlap in normals. Other cancers outside the brain had increased PME and effective treatment was often associated with diminished PME. 1H MRS of the brain was performed using ISIS and outer volume suppression pulses for volume localization. Excellent high resolution 1H water-suppressed spectra were obtained at echo times as short as 30 ms, showing well resolved peaks for lactate, N-acetylaspartate, glutamate, choline, creatinine, and inositol. 1H MRS demonstrated that the uptake of ethanol by the brain was slower than the rise of ethanol in blood. 31P spectroscopic imaging of the brain with resolution of 2.25 x 2.25 x 2.5 cm produced metabolic images and high resolution spectra from desired regions of interest.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Clinical magnetic resonance spectroscopy of brain, heart, liver, kidney, and cancer. A quantitative approach. 270 9

Certain attitudes of healthcare workers toward patients infected with human immunodeficiency virus are inconsistent with medical knowledge and appear unlikely to be changed significantly or quickly by standard educational methods. Such attitudes may be detrimental to the doctor-patient relationship. Also, they detract from the true message that healthcare professionals should be sending to the public: that acquired immunodeficiency syndrome is not spread by casual exposure, such as through food, water, or handling of food by infected persons.
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PMID:Would you eat cookies prepared by an AIDS patient? Survey reveals harmful attitudes among professionals. 274 Feb 72

Carbovir is a novel carbocyclic guanosine derivative that has potent in vitro activity against human immunodeficiency virus, the causative agent of acquired immunodeficiency syndrome (AIDS). Two methods of sample preparation were developed for the analysis of carbovir in rat blood. Solid-phase extraction on C18 extraction columns proved to be the most effective. Whole rat blood (200 microliters) was diluted with 0.8 ml of distilled water containing the internal standard. After two freeze-thaw cycles to lyse the red blood cells and subsequent centrifugation at 13,000 g, the supernatant was loaded on the C18 extraction columns. Carbovir and the internal standard were eluted with methanol-water (60:40). The extract was evaporated and reconstituted in mobile phase and the samples were injected onto a high-capacity reversed-phase column. The compounds were detected at 252 nm. Other nucleosides that could be used in the treatment of AIDS such as zidovudine and acyclovir did not interfere. Standard curves were linear over the concentration range 0.156-28.0 micrograms/ml (r2 greater than 0.99). The within-day coefficient of variation was less than 7.6% at all concentrations (n = 4). The between-day coefficient of variation ranged from 16.7 to 2.0% (n = 14). The limit of sensitivity was 0.05 micrograms/ml with a 200-microliters blood sample and the average extraction recovery was 74%. Carbovir was stable in rat blood for at least 4 h at 37 degrees C. The assay was used to determine the blood levels of carbovir in a rat after a 20 mg/kg intravenous dose.
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PMID:Liquid chromatographic assay of carbovir, a carbocyclic nucleoside active against human immunodeficiency virus. 275 56

Rahnella aquatilis, a rare enteric gram-negative rod which is usually found in fresh water, was isolated from the bronchial washing of a patient with acquired immunodeficiency syndrome. Although few clinical isolates have been reported, this is the second isolation of R. aquatilis from a human in North Carolina. A case report and discussion of R. aquatilis is presented.
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PMID:Rahnella aquatilis, an unusual gram-negative rod isolated from the bronchial washing of a patient with acquired immunodeficiency syndrome. 276 55

The use of aerosolized pentamidine was investigated in ten patients with the acquired immunodeficiency syndrome (AIDS) and Pneumocystis carinii pneumonia (PCP) who had previous or concurrent severe adverse reactions or contraindications to trimethoprim-sulfamethoxazole or parenteral pentamidine. A dose of 600 mg pentamidine in 6 ml sterile water, aerosolized in a small-particle producing jet nebulizer was administered for 25 minutes once daily for an average of 10.5 days to these ten patients. All patients improved their arterial O2 saturation and showed clinical and roentgenographic improvement within six to 21 days of aerosol pentamidine therapy. No adverse systemic reactions occurred. The results of this small open trial indicate that aerosolized pentamidine is effective and can be given safely to AIDS patients with PCP who have had adverse reactions to trimethoprim-sulfamethoxazole or parenteral pentamidine.
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PMID:Aerosolized pentamidine as second line therapy in patients with AIDS and Pneumocystis carinii pneumonia. 278 71

There is now an increased awareness of the risk of transmission of viral infections via blood and saliva after the publicity given to the human immunodeficiency viruses responsible for the acquired immunodeficiency syndrome. The herpesviruses have been found in blood, in blood products, and in saliva, and information with respect to these routes of transmission is convincing. Although hepatitis A virus is spread predominantly by water contaminated with feces (fecal-oral route), the virus is also found in saliva. On these grounds alone, these viruses must be considered a potential hazard in dentistry. Information in regard to the actual risks of their transmission in the context of dental practice is not yet available, primarily because a high proportion of infections are asymptomatic. Serologic studies of their prevalence suggest that all are widespread in the population. They are particularly common in many of the groups known to be at high risk for hepatitis B virus and human immunodeficiency virus, including promiscuous homosexuals, bisexuals, and intravenous drug abusers. In addition, pregnant women and their babies are particularly at risk from the herpesviruses. It is important to identify members of these high-risk groups as a potential source of transmission of infection through dental practice and in addition, it is important to identify them because they are prone to chronic sequelae.
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PMID:Review of the herpesviruses and hepatitis A: the potential hazards in dental care. 282 85

The outer envelope glycoprotein, gp120, has been purified from large volumes (greater than 100 liters) of HTLV-IIIB-infected H9 cell culture fluids using immunoaffinity chromatography resins prepared from immunoglobulins of AIDS patients plasma. By using a single-step immunoaffinity purification, between 7 and 28 micrograms of gp120 was recovered from each liter of culture fluid which represented between 60 and 95% of the total envelope glycoprotein present in the fluid. Envelope glycoprotein in culture media was concentrated more than 10,000 times over the starting material. The water-soluble gp120, containing trace contaminating proteins, was purified to apparent homogeneity by preparative polyacrylamide gel electrophoresis (PAGE). Envelope glycoprotein purified from culture fluids was immunogenic in laboratory animals in both native and PAGE-purified forms and was reactive with AIDS patient sera in immunoassays.
AIDS Res Hum Retroviruses 1987
PMID:Purification of 120,000 dalton envelope glycoprotein from culture fluids of human immunodeficiency virus (HIV)-infected H9 cells. 283 15

Granulomatous amebic encephalitis due to Acanthamoeba spp. usually occurs in chronically ill and debilitated individuals. Some of these patients may have received immunosuppressive therapy. Another infection due to Acanthamoeba spp. has been corneal ulcerations which usually occur after minimal trauma to the corneal epithelium (1). In contrast, primary amebic meningoencephalitis due to Naegleria fowleri usually occurs in healthy, young individuals with a history of swimming in heated swimming pools, in manmade lakes or with recent contact with contaminated water and practising water-related sports. Subclinical infections due to free-living amebas are probably common in healthy individuals with the protozoa living as "normal flora" in the nose and throat. It is possible that in humans, antibodies and cell-mediated immunity protect the host in such ordinary circumstances against invasive infection. In debilitated and chronically ill individuals, depressed cellmediated immunity may allow these protozoa to proliferate, allowing a fulminant "opportunistic" infection to develop. In the case of acanthamoebic keratitis, it is important to keep in mind that the temperature and moist environment of the eye serve as a good medium for the growth and proliferation of the amebas and is not necessarily associated with immunosuppression but rather with trauma. This review confirms that opportunistic free-living amebic infections occur with increased frequency in patients treated with steroids, radiotherapy, chemotherapeutic drugs or with broad-spectrum antibiotics and suggest that the mechanism of such infection may be depressed cell-mediated immunity or some other alteration of the immune system, like acquired immunodeficiency syndrome (AIDS).
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PMID:Acanthamoeba, an opportunistic microorganism: a review. 286 47

10 cm H2O of nasal continuous positive airway pressure (CPAP) was applied in nine subjects with Pneumocystis carinii pneumonia and the acquired immunodeficiency syndrome, all of whom had presented with bilateral pulmonary infiltrates and hypoxaemia. The procedure was tolerated well by eight patients and none of the nine had complications. 20 minutes of nasal CPAP without supplemental oxygen increased mean PaO2 from 55.9 to 68.4 mm Hg and decreased the calculated alveolar-arterial oxygen gradient from 48.3 to 34.3 mm Hg. In one patient who was breathing oxygen at 4 litres per minute, PaO2 increased by 35 mm Hg. Nasal CPAP could be a useful method for augmenting oxygenation in P carinii pneumonia.
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PMID:Nasal continuous positive airway pressure in Pneumocystis carinii pneumonia. 290 34


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