True about mucormycosis is?
**Core Concept**
Mucormycosis is a rare but life-threatening fungal infection caused by fungi of the order Mucorales, typically affecting immunocompromised individuals, diabetics, and those with neutropenia. These fungi are ubiquitous in the environment and can cause opportunistic infections in susceptible hosts.
**Why the Correct Answer is Right**
Mucormycosis primarily affects the sinuses, brain, and lungs, with the most common form being rhino-cerebral mucormycosis. The infection typically occurs when spores are inhaled, and the fungus colonizes the nasal mucosa. The pathogenesis involves the production of toxins that inhibit endothelial cell function, leading to vascular invasion and tissue necrosis. Mucormycosis is often associated with high morbidity and mortality rates due to its aggressive nature and resistance to antifungal therapy.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because mucormycosis is not typically caused by exposure to contaminated soil or plants. While environmental exposure is a risk factor, it is not the primary mode of transmission.
**Option B:** Incorrect because antifungal therapy is not always effective against mucormycosis. The fungus has a high degree of resistance to many antifungal agents, making treatment challenging.
**Option C:** Incorrect because mucormycosis is not typically associated with HIV infection. While HIV/AIDS increases susceptibility to opportunistic infections, mucormycosis is more commonly seen in patients with neutropenia, diabetes, and other immunocompromising conditions.
**Clinical Pearl / High-Yield Fact**
Mucormycosis is often referred to as the "black fungus" due to the characteristic black eschar that forms in infected tissues. This clinical finding is a key diagnostic clue for healthcare providers.
**Correct Answer: A, Amphotericin B is the treatment of choice for mucormycosis.**