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upstart writes:

The newly emerging fungal pathogen is often misidentified in common lab tests:

A dermatologist in New York City has reported the country's first known cases of highly contagious ringworm infections that are resistant to common anti-fungal treatments—and caused by a newly emerging fungus that is rapidly outstripping other infectious fungi around the world.

In February, the dermatologist reported two cases to health officials in the state, which are described in a brief case study published Thursday in the Centers for Disease Control and Prevention's Morbidity and Mortality Weekly Report.

[...] Ringworm—aka tineas, dermatophytosis, jock itch, and athlete's foot—is a superficial fungal infection of the skin that causes red, itchy, sometimes scaly circular rashes. There are more than 40 different species of fungi that can cause the infection, which spreads from infected people and animals and also lurks in environments and on common household items, like towels. Ringworm is extremely common and can strike anyone. Usually, it's treatable with over-the-counter creams.

[...] While alarming, the identification of cases in the US is not surprising. The fungus behind the infections is Trichophyton indotineae (previously described as Trichophyton mentagrophytes type VIII), which is a newly emerging fungus globally. Though genetic studies date isolates back to at least 2008 in Australia, a multidrug-resistant lineage seemed to erupt in India between 2017 and 2018. Since then, it has reached epidemic proportions in the subcontinent, replacing other common causes of ringworm, and the pathogen has rapidly emerged in many countries throughout Asia and Europe, and Canada.

[...] The rise of T. indotineae is linked to the abuse of topical treatments that contain egregiously large combinations of steroids and antifungal/antibacterial agents, spurring the development of resistance. This is particularly a problem in India.

Original Submission