A Review on: Mucormycosis -from the Pathogens to the Disease

Mucormycosis, a rare but life-threatening fungal infection, is caused by molds from the order Mucorales. This infection primarily affects immunocompromised individuals, such as those with diabetes, hematologic malignancies, or those undergoing organ transplantation. The clinical manifestations vary depending on the site of infection, with common forms including rhinocerebral, pulmonary, gastrointestinal, and cutaneous mucormycosis. Diagnosis is challenging, as there are no reliable circulating biomarkers. Definitive diagnosis relies on tissue sampling through biopsy or surgical debridement, with histopathological examination identifying broad, non-septate hyphae typical of Mucorales. Direct microscopic examination of fresh tissue, enhanced by optical brighteners and fluorescence microscopy, can aid in early diagnosis. Staining methods like Grocott methenamine silver (GMS) and periodic acid Schiff (PAS) are also helpful. Due to the invasive nature of brain biopsies and the potential for neurological damage, central nervous system mucormycosis is often diagnosed indirectly through identification of the pathogen in the sinuses or lungs. Early diagnosis and prompt antifungal treatment are crucial, as mucormycosis has a high mortality rate. Surgical debridement is often required alongside antifungal therapy. Prevention focuses on controlling risk factors such as blood glucose levels and optimizing immune function in at-risk patients.