Spotlight on the Mucormycosis Outbreak: A Deadly Fungal Infection That Followed the COVID-19 Pandemic.

Abstract

The COVID-19 pandemic along with its treatment has brought myriad potential complications including the heightened risk of secondary fungal infections like mucormycosis. Mucormycosis is a rare angioinvasive fungal infection that has traditionally been highly fatal despite surgical intervention and antifungal medications. To re-evaluate the risk factors, epidemiology, and possible COVID-19-associated conditions on a larger sample size than the existing data. We studied the possible risk factors, clinical presentations, treatment, and outcome of 203 patients with mucormycosis in a single-center retrospective-prospective observational study for three months at a tertiary care hospital after obtaining due permission from the institutional ethics committee. The mean age of patients was 52 ± 11.5 years, and 92.61% had a history of COVID-19 infection. Around 86.7% of patients were suffering from diabetes mellitus with 50% being already known cases whereas the other 50% developed post-COVID-19 infection; 65.02% of patients were administered corticosteroids during their COVID-19 treatment. About 51.72% of patients required hospital admission and among them, 16.25% of patients required ICU support. The mean oxygen saturation (SpO2) levels on admission were 84.61 ± 12.96%, and 38.92% of patients required mechanical respiratory support. The mean duration between COVID-19 infection and the onset of mucormycosis was 18.80 ± 16.61 days. The most common clinical presentations were facial pain and swelling (26.6%) and ophthalmic symptoms including eye swelling, pain, and ptosis (25.12%). Antifungal treatment was given to all the patients and 89.36% of the patients underwent surgical debridement of fungal mass. At the end of three months,60.59% of the 188 patients survived with improvement, 13.30% had no improvement and/or deterioration of health, and 18.72% succumbed to mucormycosis. Intracranial involvement and leukocytosis were positively associated with mortality whereas surgical intervention was significant forpositive outcomes at the end of three months in patients with mucormycosis(p<0.05). The sudden rise of mucormycosis during the second wave of COVID-19 can be attributed to uncontrolled blood sugar levels along with high corticosteroid usage as well as various nosocomial factors during the COVID-19 treatment. Early and aggressive treatment with surgical intervention and antifungal drugs can improve disease outcomes.