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Intracranial bacterial infections in patients with AIDS
1Division of Neuroradiology, Department of Radiology, University of Washington School of Medicine, Seattle, Washington 98104-2499, USA.
Abstract:
Nontuberculous, nonsyphilitic intracranial bacterial infections in HIV-positive individuals may be nonspecific presentations of unusual organisms, such as R. equi, B. henselae, Nocardia sp. or L. monocytogenes. In addition, more common organisms, such as Staphylococcus, Streptococcus, or Salmonella sp. may cause an unusually severe infection. In general, the imaging appearance of these bacterial infections is similar to that in immunocompetent individuals.
Insights
Intracranial bacterial infections in individuals with human immunodeficiency virus (HIV) can present with unusual organisms or severe common infections. Imaging findings are typically similar to those in immunocompetent individuals.
Area of Science:
- Neuroinfectious diseases
- Immunocompromised hosts
- Bacteriology
Background:
- HIV-positive individuals are susceptible to various opportunistic infections.
- Intracranial bacterial infections in this population can be challenging to diagnose.
- Nonsyphilitic and nontuberculous infections require specific consideration.
Purpose of the Study:
- To describe the spectrum of nontuberculous, nonsyphilitic intracranial bacterial infections in HIV-positive individuals.
- To highlight common and unusual bacterial pathogens involved.
- To correlate imaging findings with clinical presentations.
Main Methods:
- Review of medical literature on intracranial bacterial infections in HIV.
- Analysis of case reports and series detailing specific organisms.
- Comparison of imaging characteristics between HIV-positive and immunocompetent patients.
Main Results:
- Unusual organisms (e.g., Rhodococcus equi, Bartonella henselae, Nocardia spp., Listeria monocytogenes) can cause infections.
- Common bacteria (e.g., Staphylococcus, Streptococcus, Salmonella spp.) may lead to severe disease.
- Radiological appearances are generally similar to those in immunocompetent individuals.
Conclusions:
- Intracranial bacterial infections in HIV are diverse, involving both rare and common pathogens.
- Clinical and microbiological awareness is crucial for timely diagnosis and treatment.
- Imaging plays a role in detection but is often nonspecific.