Widespread (disseminated) mucormycosis typically occurs in people who are already sick from other medical conditions, so it can be difficult to know which symptoms are related to mucormycosis. People with disseminated infection in the brain can develop changes in mental status or lapse into a coma. Cause
Mucormycosis is a fungal infection caused by fungi in the order Mucorales. In most cases it is due to an invasion of the genera Rhizopus and Mucor, common bread molds. Most fatal infections are caused by Rhizopus oryzae. It is less likely due to Lichtheimia, and rarely due to Apophysomyces. Others include Cunninghamella, Mortierella, and Saksenaea.The fungal spores are in the environment, can be found on, for instance, moldy bread and fruit, and are breathed in frequently, but cause disease only in some people. In addition to being breathed in to be deposited in the nose, sinuses and lungs, the spores can also enter the skin via blood or directly through a cut or open wound, or grow in the intestine if eaten. Once deposited, the fungus grows branch-like filaments which invade blood vessels, causing clots to form and surrounding tissues to die. Other reported causes include contaminated wound dressings. Mucormycosis has been reported following the use of elastoplast and the use of tongue depressors for holding in place intravenous catheters. Outbreaks have also been linked to hospital bed sheets, negative-pressure rooms, water leaks, poor ventilation, contaminated medical equipment, and building works.
A confirmed case was defined as 1) necrotizing soft-tissue infection requiring antifungal treatment or surgical debridement in a person injured in the tornado, 2) with illness onset on or after May 22 and 3) positive fungal culture or histopathology and genetic sequencing consistent with a mucormycete. No additional cases related to that outbreak were reported after June 17. Ten people required admission to an intensive-care unit, and five died.In 2014, details of a lethal mucormycosis outbreak that occurred in 2008 emerged after television and newspaper reports responded to an article in a pediatric medical journal. Contaminated hospital linen was found to be spreading the infection. A 2018 study found many freshly laundered hospital linens delivered to U.S. transplant hospitals were contaminated with Mucorales. Another study attributed an outbreak of hospital-acquired mucormycosis to a laundry facility supplying linens contaminated with Mucorales. The outbreak stopped when major changes were made at the laundry facility. The authors raised concerns on the regulation of healthcare linens. Other animals
Mucormycosis in other animals is similar, in terms of frequency and types, to that in people. Cases have been described in cats, dogs, cows, horses, dolphins, bison, and seals. References
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