A Rare Case of Invasive Mucormycosis in a Diabetic Patient Treated with a Short Course of Dexamethasone

Successful treatment of rhino-cerebral mucormycosis with dual antifungal therapy and minimal surgical debridement

The authors report the case of a 42-year-old female with history of type I diabetes mellitus and recent episode of diabetic ketoacidosis who presented with symptoms of epistaxis, gastrointestinal upset, hyperglycemia, confusion, and a cough. She was found to have rhino-cerebral mucormycosis with associated multi-focal strokes and a left internal carotid artery pseudoaneurysm. Her infection was successfully treated with dual-antifungal therapy consisting of liposomal amphotericin B and isavuconazole, and required only minimal surgical debridement.

Resolving the equation between mucormycosis and COVID-19 disease

The COVID-19 patients, both infected and recovered are rapidly contracting mucormycetes infections due to the 'Mucorales' order, under Zygomycetes class of fungi. The mucorales fungi commonly known to exist in our natural surroundings including soil, but the frequency of incidences was never rampant. This sudden spike in infections, is locally known as 'black fungus,' and is affecting various organs, including- eyes, sinuses, nose, brain, skin, intestine, lungs, etc. The severity of situation is ascertainable from the fact that, in certain cases surgical eye/jaws removal persists as the only viable option to avert mortality, as therapeutic interventions are limited. This epidemic situation intrigued experts to investigate the probable reason behind this unpredicted escalation in reported cases, including in recuperated COVID-19 patients, as person-to-person spread of infection is not common. The comparison of physiological parameters in healthy and COVID-19 afflicted patients highlights that the underlying conditions including diabetes mellitus, steroidal therapy, lymphopenia (decreased CD4+ and CD8+ lymphocytes), deregulated cytokine release storm, elevated free iron levels (hemosiderosis) in blood and insulin insensitivity are playing major roles in deteriorating conditions in rarely pathogenic fungal infections. This review is an attempt to explain the rationalities that makes people vulnerable to mucormycetes infection.

Risk of Mucormycosis in Diabetes Mellitus: A Systematic Review

Hyperglycemia or diabetes mellitus (DM) is a disorder of the endocrine system. In this condition, the body is insulin-deficient or resistant to insulin. Due to insulin deficiency or resistance, the body is unable to process sugar. The worldwide prevalence of diabetes mellitus is rising substantially. Hyperglycemia makes the immune system weak, which increases the risk of infection in a diabetic patient. Fungal infection is more common in DM. Mucormycosis is a rare fungal infection in a healthy individual, but in DM, it can cause severe complications and even be fatal if not treated adequately and timely. In our literature review, a total of 19 published articles from the PubMed database and Google Scholar were included. We combed the PubMed database and Google Scholar by using various inclusion and exclusion criteria. The result of the review study shows the increased risk of mucormycosis in a diabetic patient.