Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0019693 (HIV)
 170,526 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

OBJECTIVES: To compare the diagnostic usefulness in tuberculosis of the serodiagnostic enzyme-linked immunosorbent assay (ELISA) kit A60 (Anda Biologicals, Strasbourg, France) and of our domestic ELISA based on three purified cell wall glycolipid antigens. METHODS: The presence and concentrations of IgG and IgM anti-A60 antibodies and anti-LOS, anti-DAT and anti-PGLTb1 antibodies against the glycolipid antigens were determined by ELISA in 50 HIV-seronegative and 46 HIV-seropositive patients, with documented active tuberculosis. The specificity of these ELISAs was determined with use of sera from 50 healthy blood donors, 29 patients with non-mycobacterial pulmonary diseases and 24 HIV-positive patients with disseminated Mycobacterium avium infection. RESULTS: With a calculated cut-off for each antigen and immunoglobulin that gave a specificity higher than or equal to 98%, the cumulative ELISA results showed that only 36.5% of the patients with tuberculosis had a positive response in the A60 test, as compared with 84.4% who showed a response to the three glycolipid antigens (p<0.001). This striking difference persisted when the cumulative sensitivities were calculated according to the HIV status of the patients and the localization of tuberculosis. The anti-A60 antibody (IgG and IgM) levels and the degree of sensitivity of the ELISA for detection of A60 antigen were always lower in HIV-positive patients with pulmonary and extrapulmonary tuberculosis than in HIV-negative patients with tuberculosis. The sensitivity of A60 ELISA was further decreased in HIV-positive patients with low CD4+ lymphocytes counts, in contrast to the results with the three glycolipid antigens. CONCLUSIONS: These results show the limitations of the A60 ELISA, and confirm the potencies of the glycolipid antigens in serodiagnosis of tuberculosis in HIV-positive and HIV-negative patients.
 ...
PMID:Comparison of A60 and three glycolipid antigens in an ELISA test for tuberculosis. 1186 46

Tuberculosis is a chronic bacterial infection caused by Mycobacterium tuberculosis. It continues as an important cause of morbidity and mortality worldwide, especially in impoverished countries and where human immunodeficiency virus infection is endemic. The modern treatment of tuberculosis is based on the administration of effective drugs. Regimens do not differ for pulmonary and extra-pulmonary tuberculosis. In order to prevent the emergence of drug-resistant organisms, which is present initially in very small numbers, at least two effective drugs are always required. Short-course therapy has been developed to mitigate the consequences of patient default. It is best considered as consisting of two phases. An initial 2-month intensive phase of daily therapy should include isoniazid, rifampin, ethambutol and pyrazinamide. A consolidation phase of daily therapy with isoniazid and rifampin should be continued for an additional 4 months, preferably more for special clinical circumstances. This standardized drug strategy is successful only if the resources conserved by shortening treatment are used to maintain patient compliance. Completely supervised regimens have been also developed with success. Defaults lead not only to treatment failure but also the emergence and transmission of drug-resistant organisms. Treatment of confirmed or suspected drug-resistant tuberculosis is difficult and should only be made on experts consultation. More difficult to use and/or less effective than first line drugs, second line drugs could be chosen and associated. However drug toxicities should be monitored, with greatest concern to hepatitis. Follow-up of patients must be organised until 2 years after the completion of therapy to detect relapses. Treatment includes prophylactic measures which are a major modality for decreasing the spread of infection.
 ...
PMID:[Treatment of tuberculosis infection]. 1203 94

Based on analysis of data collected from the national tuberculosis prevention program in Djibouti between 1990 and 1996, the authors analyzed the relationship between HIV infection and tuberculosis. The study cohort comprised a total of 22,000 patients including 14,000 with documented HIV infection. Although HIV infection probably worsened the situation, it was neither the only nor the main factor involved in the resurgence of tuberculosis. Demographic growth, higher population density, and increasing poverty as well as the quality of the national tuberculosis prevention program must be taken into account. The incidence of smear-negative tuberculosis was not significantly higher in HIV-infected patients (incidence of smear positive cases, > 92%). Extrapulmonary tuberculosis especially of pleural involvement was more common (15% versus 9.4%). Treatment was effective in HIV-infected patients. If directly observed (DOT) therapy was used, there was no risk of emergence of multidrug-resistant tuberculosis strains. Drug side-effects associated with the protocols used in Djibouti were not greater in HIV-infected patients. Most additional mortality observed in HIV-infected tuberculosis patients (10.5% versus 2%) was due to progression of HIV infection.
 ...
PMID:[Tuberculosis and HIV infection: experience of the national tuberculosis prevention program in Djibouti: 1990-1996]. 1219 16

A three-staged prospective study involving 430 patients with tuberculosis was conducted at the Tuberculosis Institute, Baghdad during 1996-98. Of the 430 patients, 270 were males, 370 patients were diagnosed as pulmonary tuberculosis and 60 patients had extrapulmonary tuberculosis. Considering some risk factors for human immunodeficiency virus (HIV) infection, 11 patients had tattoos, 13 were prisoners and 5 were barbers. All the patients were tested for HIV infection and all were negative.
 ...
PMID:HIV infection in patients with tuberculosis in Baghdad (1996-98). 1219 34

Tuberculosis is one of the leading infectious diseases globally besides HIV/AIDS and malaria. Around 8 million people per year develop active tuberculosis, of whom 2 million eventually die of the disease. Of special importance to Germany is the epidemiologic situation in the former Soviet Union, where new infections are rising steeply. This region is also a hot spot for the development of multidrug-resistant tuberculosis. In 2000, the WHO registered already 273 000 cases of multidrug-resistant tuberculosis worldwide. In Germany the tuberculosis situation is stable. 9 064 persons (910 less than 1999) had tuberculosis in the year 2000. 5 271 cases were tuberculosis of the respiratory tract with detection of Mycobacteria tuberculosis. In 2 264 cases registered as tuberculosis of the respiratory tract, Mycobacteria tuberculosis could not be detected. 1 529 persons developed extrapulmonary tuberculosis. The highest incidences were found among the elderly. One third of the tuberculosis patients were born outside Germany. Resistance to antituberculous drugs also increased slowly in Germany. A study of the DZK, although with small numbers, demonstrated an increase of multidrug-resistant tuberculosis from 1.2 % (1996) to 1.7 % (2000), which also influenced the treatment outcome. With rising resistance rates, the treatment success decreased from 77.5 % in fully susceptible to 59.5 % in multidrug-resistant cases.
 ...
PMID:[The state of tuberculosis in Germany in 2000]. 1221 14

381 HIV serodiagnostic tests were carried out between August 1989 and June 1992 at the Roosevelt Hospital in Guatemala. 80 were positive, and 45 of those met the US Centers for Disease Control clinical criteria for AIDS. 80% of the patients were from Guatemala City. 80% of the subjects underwent testing for some clinical indication. All tests were anonymous, confidential, and voluntary. 34 of the 45 patients with AIDS were male. Over 85% were aged between 21 and 40 years. All the women and 48.5% of the men with AIDS reported they were heterosexual. 45.5% of the men were bisexual and 6% homosexual. Extrapulmonary tuberculosis, cryptosporidium, cryptococcosis, esophageal candidiasis, and chronic herpes were the most common opportunistic infections. 44% of the patients with AIDS had died and 8% did not return for follow-up after testing. Average survival after diagnosis was 6.5 +or- 1.3 months.
 ...
PMID:[AIDS: clinical experiences in Roosevelt Hospital]. 1229 Jun 20

Paradoxical deterioration during antituberculosis therapy, defined as the clinical or radiological worsening of pre-existing tuberculous lesions or the development of new lesions in a patient who initially improves, remains a diagnostic dilemma. Although different clinical presentations of paradoxical response have been described, a systematic analysis of the entity in non-HIV-infected patients is lacking. Reported here are two cases of paradoxical deterioration in which sequential changes in lymphocyte counts and tuberculin skin test results are emphasized. In addition, 120 episodes of paradoxical response after antituberculosis treatment were reviewed. Of the total 122 episodes, 101 (82.8%) were associated with extrapulmonary tuberculosis. The median time from commencement of treatment to paradoxical deterioration was 60 days. The median time to onset of central nervous system manifestations (63 days) was longer than the time to onset of manifestations at other sites (56 days) ( P=0.02). Development of new lesions in anatomical sites other than those observed at initial presentation was observed in 31 (25.4%) episodes. A surge in the lymphocyte count, accompanied by an exaggerated tuberculin skin reaction, was observed in our patients during the paradoxical deterioration, analogous to the findings in HIV-positive patients. Treatment of the paradoxical response included surgical intervention (60.7%) and administration of steroids (39.3%). The use of steroids appeared to be safe in this series, as 95% of the Mycobacterium tuberculosis isolates were susceptible to first-line antituberculosis therapy.
 ...
PMID:Clinical spectrum of paradoxical deterioration during antituberculosis therapy in non-HIV-infected patients. 1246 90

In the Orenburg Region, HIV-infected individuals fall ill with tuberculosis tens time more frequently than uninfected ones. Thirty five HIV-infected patients with tuberculosis and 32 patients without immunodeficiency (a control group) were examined and treated. Of the clinical forms of tuberculosis, infiltrative tuberculosis was predominant, tissue destruction being seen in half the cases. Extrapulmonary tuberculosis was revealed in 11.4% of the patients. Multidrug resistance was ascertained in 20% of cases. The efficiency of treatment in patients with double HIV/tuberculosis infection was 10-15% lower than that in those without HIV infection.
 ...
PMID:[Clinical picture and treatment of tuberculosis in HIV-infected patients]. 1250 90

A case of multifocal vertebral tuberculosis with lytic involvement of multiple ribs and cold abscess is presented. The lungs were normal and the radiographic appearance of the skeletal lesions mimicked secondary metastasis of unknown primary site, malignant lymphoma and multiple myeloma. HIV serology was negative. Tuberculosis should be high in the differential diagnosis of multiple destructive bone lesions especially in patients from regions where tuberculosis is endemic. The patient's response to standard antituberculous treatment was favorable. Medline data base search revealed that multifocal osteoarticular tuberculosis is not associated with HIV infection unlike other forms of extrapulmonary tuberculosis.
 ...
PMID:Multifocal vertebral tuberculosis with the involvement of the ribs case report. 1259 59

The number of people infected with human immunodeficiency virus (HIV) is gradually increasing in Japan, and the morbidity rate from tuberculosis in the Japanese people is high. Accordingly, the number of cases with both infections is considered to increase in the future. Our hospital has already encountered 31 cases of HIV associated tuberculosis. HIV infects mainly CD4-positive cells. The extreme decrease in the cell count results in serious cellular immunological disorder. CD4-positive cell disorder induces disorders of B lymphocytes, cytotoxic T cells, natural killer cells, and macrophage functions. These destructive conditions show the state of immunodeficiency including macrophage that are most important for defense of acid-fast bacterial infection. Migration and activation of macrophages with cytokines derived from T cells are impaired to induce the following phenomena: hypoplasia of granuloma, failure of tubercule bacillus suppression, the spread to regional lymph nodes (hilar or mediastinal lymph nodes), and hematogenous dissemination. On this occasion, caseous necrosis and cavitation are unlikely to occur, and false-negative tuberculin reaction is often observed. The incidence of severe cases, which include miliary tuberculosis, tuberculous meningitis, etc., and extrapulmonary tuberculosis, are high among acquired immunodeficiency syndrome (AIDS)-associated tuberculosis cases. HIV-infected tuberculosis cases are generally regarded as endogenous exacerbation, but they include primary infection and reinfection as well. Even during the treatment for drug-sensitive strains particularly, some cases may have reinfection with multidrug-resistant bacteria, suggesting that caution should be taken against this point. Conversely, the association of tuberculosis is a factor for the poor prognosis of HIV infection, since it facilitates the development of HIV infection. If the bacteria belong to a drug-sensitive strain, the infection with them responds well to antituberculous drugs, the same as in tuberculosis cases without HIV infection, showing a favorable prognosis. However, the mortality rate of infection with multi-drug-resistant tuberculosis is extremely high. The combined use of a protease inhibitor, i.e., anti-HIV drug, with rifampicin is regarded as contraindication for the treatment because rifampicin strongly induces hepatic cytochrome P-450 and increases the metabolism of protease inhibitors and nonnucleoside reverse transcriptases to markedly decrease the blood concentrations. Accordingly, the treatment for tuberculosis should take priority over that for HIV infection in HIV-infected tuberculosis, and highly active antiretroviral therapy (HAART) may be administered after the treatment of tuberculosis. When HAART is necessary for the treatment during the tuberculosis treatment, rifampicin had better be exchanged to rifabutin because the effect of rifabutin to induce cytochrome P-450 is less potent than that of rifampicin. A report has recently shown that the exacerbation of pyrexia and chest X-ray findings was transiently observed approximately 2 weeks after potent anti-HIV therapy for HIV-infected tuberculosis, which included a protease inhibitor. The reason for the exacerbation has been believed to be that the impaired function of CD4-positive cells is improved by the administration of anti-HIV drugs to raise temporarily the reaction of the vital part to M. tuberculosis. A tuberculin skin test (TST) reaction size of > or = 5 mm of induration is considered positive (i.e., indicative of M. tuberculosis infection) in persons who are infected with HIV. Persons with a TST reaction size > or = 5 mm who have not previously received treatment for M. tuberculosis infection should receive tuberculosis preventive treatment. Prevention by BCG vaccination is regarded as contraindications for HIV-infected patients, because disseminated M. bovis infection may be associated with them. Many HIV-positive patients infected with tuberculosis show uneventful healing, when M. tuberculosis is the sensitive strain. However, since some patients show the rapid course of tuberculosis, clinical physicians keep the early detection of tuberculosis for HIV-infected patients and the association of HIV infection for tuberculosis patients in their mind, respectively.
 ...
PMID:[HIV infection and tuberculosis]. 1265 6


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>