Which fungi are commonly involved in allergic sinus disease in the immunocompetent?

Which fungi are commonly involved in allergic sinus disease in the immunocompetent?

• A. Dematiaceous fungi
• B. Candida albicans
• C. Aspergillus fumigatus
• D. Dematiaceous fungi or Alternaria species

Answer: (D)

Allergic fungal sinusitis in people with a normal immune system is driven by an allergic reaction to environmental molds, particularly pigmented (dematiaceous) ones. The presence of pigment is a helpful clue that these are dematiaceous fungi, which are the usual triggers of this condition. Among these, Alternaria species are among the most common culprits, making them a characteristic cause of allergic sinus disease in immunocompetent hosts. This form is driven by an immune response rather than invasive infection, so you see eosinophilic mucin and nasal polyps rather than tissue invasion. Candida albicans isn’t typically associated with allergic sinusitis; it more often causes mucosal candidiasis in other settings. Aspergillus fumigatus can cause various sinus diseases, especially in different contexts (invasive disease in immunocompromised patients or allergic syndromes in some circumstances), but the classic allergic sinusitis in immunocompetent individuals is linked to dematiaceous molds, with Alternaria being a key example.

Allergic fungal sinusitis in people with a normal immune system is driven by an allergic reaction to environmental molds, particularly pigmented (dematiaceous) ones. The presence of pigment is a helpful clue that these are dematiaceous fungi, which are the usual triggers of this condition. Among these, Alternaria species are among the most common culprits, making them a characteristic cause of allergic sinus disease in immunocompetent hosts. This form is driven by an immune response rather than invasive infection, so you see eosinophilic mucin and nasal polyps rather than tissue invasion.

Candida albicans isn’t typically associated with allergic sinusitis; it more often causes mucosal candidiasis in other settings. Aspergillus fumigatus can cause various sinus diseases, especially in different contexts (invasive disease in immunocompromised patients or allergic syndromes in some circumstances), but the classic allergic sinusitis in immunocompetent individuals is linked to dematiaceous molds, with Alternaria being a key example.