Oral candidiasis presents with white patch in all except?
**Core Concept**
Oral candidiasis, also known as oral thrush, is a fungal infection caused by Candida species, particularly Candida albicans. It typically presents with white patches on the mucous membranes of the oral cavity, which can be wiped off, leaving behind a red, bleeding surface.
**Why the Correct Answer is Right**
The characteristic white patches in oral candidiasis are composed of yeast cells and hyphae that adhere to the mucosal surface. This adherence is facilitated by the production of adhesins, which interact with host cell receptors, such as integrins. The white patches can be easily wiped off, revealing a red, bleeding surface underneath, indicating the presence of an infection.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because oral candidiasis can present with white patches, which are a hallmark of the disease.
**Option B:** This option is incorrect because oral candidiasis can occur in immunocompromised patients, such as those with HIV/AIDS, diabetes, or taking immunosuppressive medications.
**Option C:** This option is incorrect because oral candidiasis can be caused by Candida species other than Candida albicans, such as Candida glabrata or Candida tropicalis.
**Clinical Pearl / High-Yield Fact**
Oral candidiasis can be treated with antifungal medications, such as fluconazole or nystatin, and the condition is often associated with denture stomatitis in patients who wear dentures.
**Correct Answer:** D.