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  • Acquired immunodeficiency syndrome and AIDS related complex patients  (1)
  • Acquired immunodeficiency syndrome patients  (1)
  • Antiretroviral therapy  (1)
  • 1
    ISSN: 1432-1440
    Keywords: Primary human cytomegalovirus infection ; IgE antibody capture enzyme-linked immunosorbent assay ; Renal transplant recipients ; Acquired immunodeficiency syndrome patients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An antibody capture assay using an enzyme-linked human cytomegalovirus (HCMV) antigen for the detection of specific immunoglobulin E (IgE) was established. IgG, M, and E responses to HCMV were studied in 497 sera obtained from 44 renal transplant recipients and 51 acquired immunodeficiency syndrome (AIDS) patients. The results were compared with those obtained from 58 HCMV-seropositive healthy individuals. HCMV-specific IgE was detected in 11 (91.7%) renal transplant recipients with primary HCMV infection. In contrast, antibodies of the IgG and IgM classes were detected in only 6 (50.0%) of these patients. Specific IgE was detected in 10 (90.9%) out of 11 renal allograft recipients suffering from secondary HCMV infection. Significant IgG titer rises and IgM were detected in 2 (18.2%) and 6 (54.6%) of these patients, respectively. IgG titer rises and IgM and IgE antibodies were seen in 5 (12.2%), 1 (2.4%) and 18 (43.9%) AIDS patients respectively. All healthy immunocompetent HCMV-seropositive individuals were tested IgE negative. The results obtained in our study indicate that IgE against HCMV is a more reliable serologic marker for primary and secondary HCMV infection than IgM in immunocompromised individuals, especially in organ transplant recipients, since it is not affected by the prophylactic application of HCMV hyperimmune globulin preparations.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Human cytomegalovirus ; Neonates ; Acquired immunodeficiency syndrome and AIDS related complex patients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The present retrospective study compares the laboratory diagnosis of cytomegalic inclusion disease (CID) by the use of “shell vial culture” [i.e., immunoperoxidase staining of human cytomegalovirus (HCMV) early antigen in human fibroblasts 24 h postinoculation] to the results of serology (i.e. immunoglobulins IgG, IgM, and IgA HCMV antibody testing) in 21 infants with congenital or postnatally acquired HCMV infection, 5 patients with lymphoproliferative disorders, 35 human immunodeficiency virus (HIV)-seropositive patients who met the Centers for Disease Control (CDC) criteria for stages IVA and IVB of HIV infection, and 115 patients suffering from the acquired immunodeficiency syndrome, AIDS (stages IVC-IVE according to CDC criteria). HCMV infection was diagnosed by means of the shell vial culture inoculated with patient samples (e.g., urine, bronchoalveolar lavage, induced sputum, etc.) and serology in 163 (92.6%) and 65 (36.9%) patients, respectively. Viral shedding was detected by shell vial culture in 100% of the neonates, 80% of the patients suffering from lymphoproliferative disorders, 100% of the AIDS related complex (ARC) and 89.6% of the AIDS patients. In contrast, serologic testing for HCMV-specific antibodies was positive in only 28.6%, 42.9%, and 34.8% of the neonates, ARC, and AIDS patients, respectively. In lymphoma patients, serologic testing gave identical results (80%) to the shell vial culture technique. With the use of the shell vial procedure, active HCMV infection in immunocompromised subjects and neonates can be recognized more reliably than by serologic testing. Nevertheless, in a low percentage of patients (7.4%), virus isolation by the shell vial culture may fail to detect HCMV infection.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1439-0973
    Keywords: Key Words Cellular resistance ; TK1 activity ; HIV-1 ; Zidovudine ; Antiretroviral therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cellular cytoplasmatic thymidine kinase 1 (TK1) catalyzes the intracellular phosphorylation of anti-HIV-1 nucleoside analogs zidovudine (AZT) and stavudine (d4T) to the corresponding monophosphate form. In HIV-1-infected patients, treated with combination therapy including one of these compounds for more than 1 year, enzymatic activity of TK1 in peripheral blood mononuclear cells (PBMC) was determined by radioactive assay. TK1 activity in PBMC of HIV-1-infected patients correlated with CD4 cell count (r = 0.4, p 〈 0.05) and HIV-1 RNA copy number (r = 0.4, p 〈 0.05), being lower in patients with decreased CD4 cell count and high viral load. Furthermore, TK1 activity differs between HIV-1-infected individuals treated for more than 6 months (13.5 pmol/mg/h) compared to patients treated for less than 6 months (28.1 pmol/mg/h; p 〈 0.05) with chemotherapeutic agents including thymidine analogs. The results demonstrate that TK1 deficiency in PBMC of HIV-1 infected patients may develop due to continuous treatment with thymidine analogs and correlates with a more progressed stage of disease expressed as diminished CD4 cell count and increased viral load.
    Type of Medium: Electronic Resource
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