Antigen-specific oligoclonal IgG in AIDS-related cytomegalovirus and toxoplasma encephalitis

D. Franciotta, E. Zardini, G. Bono, R. Brustia, L. Minoli, V. Cosi

Research output: Contribution to journalArticlepeer-review


Objective - We retrospectively studied serum and cerebrospinal fluid (CSF) specimens from AIDS patients with either cytomegalovirus (2 cases) or Toxoplasma gondii (5 cases) encephalitis. The samples, which had previously proved to be negative for total IgG oligoclonal bands (OCBs), were investigated for antigen-specific OCBs directed to the disease-related opportunistic agent. Material and methods - Paired serum and CSF samples from the given AIDS patients were considered. We undertook affinity immunoblotting of either virus- or protozoan-specific IgG onto antigen-coated nitrocellulose paper after protein separation by agarose isoelectric focusing (IEF). Results - Antigen-specific OCBs to the disease-related opportunistic agent were detected in serum and in CSF samples from all the patients. Conclusions - During overt AIDS, routine IEF methods may fail to detect OCBs, probably because nonspecific polyclonal hypergammaglobulinemia, which is typical of this disease, reduces their visibility. Our LEF/immunoblotting profiles are characterized by identical serum and CSF bands. The detection of antigen-specific OCBs may support the diagnosis of some opportunistic infections of the central nervous system in AIDS.

Original languageEnglish
Pages (from-to)215-218
Number of pages4
JournalActa Neurologica Scandinavica
Issue number3
Publication statusPublished - 1996


  • AIDS-related opportunistic infections
  • Cerebrospinal fluid
  • Diagnostic tests
  • IgG bands
  • Oligoclonal IgG

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)


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