Officials from the U.S. Health Department said that they have now found evidence of an untreatable form of fungus in two nursing homes and two hospitals.

The “superbug” outbreaks were reported in a Washington, D.C., nursing home and at two Dallas-area hospitals, the Centers for Disease Control and Prevention reported. A few patients were diagnosed with invasive fungal infections which were resistant to all three major medications.

“This is the first time that we’ve seen clustering of resistance,” Dr. Meghan Lyman, CDC, stated. Patients seemed to be sharing the infection with each other.

Candida auris is a dangerous form of yeast and is considered to be dangerous for patients in nursing homes and hospitals with serious medical conditions. It can be fatal when it gets into the bloodstream, heart, or brain. The fungus can spread from patient contact to contaminated surfaces, causing outbreaks in hospitals and health care facilities.

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After seeing superbugs infected with common drugs, health officials have raised alarms about this bug for many years. Three cases of superbug infection were diagnosed in New York by doctors in 2019. They were resistant to an echinocandin class of drugs that was considered the last line of defense.

These cases did not show evidence of infection spreading from patient to patient. Scientists concluded that resistance developed during treatment.

According to the CDC, there was no spread of these new cases.