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Microsporidium-associated sinusitis

R B Moss1, L M Beaudet, B M Wenig

  • 1Allergic Disease Section, NIAID, NIH, Bethesda, Maryland, USA.

Ear, Nose, & Throat Journal
|February 1, 1997
PubMed
Summary
This summary is machine-generated.

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Two HIV-positive patients developed chronic sinusitis caused by Microsporidium Septata intestinalis. Local CD4-positive cell deficiency in nasal mucosa may predispose individuals to such opportunistic infections.

Area of Science:

  • Immunology
  • Infectious Diseases
  • Microbiology

Background:

  • Chronic sinusitis is a common condition, but Microsporidium-associated cases are rare, particularly in immunocompromised individuals.
  • Human immunodeficiency virus (HIV) seropositivity is associated with a weakened immune system, increasing susceptibility to opportunistic infections.

Observation:

  • Two HIV-seropositive patients presented with biopsy-proven chronic sinusitis.
  • Microsporidium Septata intestinalis spores were identified in nasal mucosa samples using light and electron microscopy.
  • Immunohistochemical analysis revealed severe deficiencies of CD4-positive cells in the nasal mucosa of both patients.

Findings:

  • This study reports two new cases of Septata intestinalis-associated sinusitis, adding to the limited existing literature.

Related Experiment Videos

  • The findings suggest a link between Microsporidium infection and CD4-positive cell depletion in the nasal mucosa of HIV-positive individuals.

    • Implications:

    • The observations support the hypothesis that impaired local mucosal immunity contributes to opportunistic infections in HIV-seropositive patients.
    • Further research into mucosal immunity defects in HIV may help in preventing and treating opportunistic infections like Microsporidium sinusitis.