Minnesota Becomes Ground Zero for Rare STD Outbreak

Minnesota is experiencing the largest outbreak of trichophyton mentagrophytes genotype VII (TMVII), a rare sexually transmitted fungal infection, in the United States. Since last July, more than 30 cases have been identified in the Twin Cities area.

Outbreak Details

The fungal infection was first detected in New York City in early 2024, but Minnesota's cluster is the largest recorded so far. Health experts note that TMVII appears most frequently among men who have sex with men, especially those using anonymous dating apps or with a history of STIs.

Unique Characteristics and Challenges

TMVII is distinguished as the only known sexually transmitted fungal infection, causing painful and itchy coin-sized rashes often misdiagnosed as eczema or psoriasis. If untreated, it can progress to open sores and severe inflammation. It spreads through genital contact but can also affect other body parts.

Treating the infection requires weeks to months of oral medication, as it resembles other strains making diagnosis difficult without specialized tests. Over-the-counter steroid creams worsen TMVII, according to doctors' warnings.

Prevention and Recommendations

To prevent further spread, experts advise transparency with partners and isolation if new rashes appear. Avoid sharing towels, clothing, or razors due to resilient spores. Covering rashes with bandages and washing hands post-contact help contain the infection.

Laundry washed on high heat is recommended to eliminate spores from bedding and clothes at home. The public health risk remains low but higher for certain groups such as MSM and those with STI histories.