Understanding Sexually Transmitted Fungal Infection (TMVII)
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer: What is a sexually transmitted fungal infection (TMVII)?
Sexually transmitted fungal infection (TMVII) is a skin condition caused by the fungus Trichophyton mentagrophytes genotype VII, spread through sex, skin-to-skin contact or shared items. [4] [5] It causes red, circular, itchy and painful rashes on the genitals, legs or face. [5] Treatment requires prescription oral antifungal medicines, because over-the-counter topical creams do not work against it. [5]
What the research says
An emerging, clonal pathogen: TMVII is described as a globally emerging sexually transmitted dermatophyte causing painful, pustular lesions on the face, pubic area, genitalia, and trunk, and whole-genome sequencing of four UK isolates showed a highly clonal population (Reid et al., Med Mycol, 2026) [1].
Seen in adult men in France: Among 92 isolates from three French laboratories, genotype VII accounted for 16.3% of the T. mentagrophytes complex and was isolated exclusively from adult men (Jabet et al., Med Mycol, 2026) [2].
Suspect it when ringworm will not clear: Two patients in Orange County, California, referred for recalcitrant ringworm that had not responded to prior therapy grew genotypes VII and VIII on culture, and both were successfully treated with a combination of oral and topical azoles (Guarina et al., ASM Case Rep, 2026) [3].
CDC guidance on treatment: Oral terbinafine typically requires 6 to 12 weeks, short courses under 2 weeks are ineffective, and topical corticosteroids should be avoided because they can worsen symptoms (CDC, Clinical Overview of TMVII, updated October 8, 2026) [4].
What is the sexually transmitted fungal infection TMVII?
Trichophyton mentagrophytes genotype VII (TMVII) represents a significant development in clinical dermatology as the only known fungal infection classified as a sexually transmitted infection (STI). [5] While other fungal conditions like jock itch or yeast infections may occasionally spread during sexual activity, they are not primarily categorized as STIs. [5] TMVII is distinct because its primary mode of transmission is through anal, vaginal, or oral sex. [5]
The infection typically manifests as a severe skin rash that can be both physically uncomfortable and persistent. It is often more aggressive than other common skin fungi, requiring a specific diagnostic and treatment approach. [4] [5] Because it can be mistaken for more common rashes, understanding its unique characteristics is essential for proper health management.
What are the symptoms of TMVII?
The hallmark of a TMVII infection is a distinct rash that often appears in the genital region, though it can spread to other areas of the body. The appearance of the rash is typically ring-shaped, mirroring other forms of ringworm but with more pronounced clinical features. [5]
How is TMVII transmitted and who is at risk?
TMVII is highly contagious and spreads through direct contact with the infected rash. While sexual activity is the most common pathway, the fungus can also survive on surfaces, making indirect transmission possible through the sharing of towels, bedding, or personal wellness items. [4] [5]
Anyone who comes into contact with the fungus is at risk, though certain populations have shown higher infection rates in clinical observations. Specifically, men who have sex with men and individuals who engage in commercial sex work are considered at an increased risk. [5] Because the fungus can be transmitted even when using barrier protection if the rash is not fully covered, awareness of physical symptoms in partners is a critical preventive measure. [5]
How is TMVII diagnosed?
Identifying TMVII can be challenging because it often resembles other fungal infections in its early stages. Healthcare providers frequently suspect TMVII when a persistent rash fails to respond to standard topical antifungal treatments. [4] [5] A definitive diagnosis requires laboratory confirmation. [4]
Diagnostic Step | Procedure and Purpose |
|---|---|
Visual Inspection | Initial assessment of the rash's circular shape and location. |
Skin Scraping | Collecting a small sample of skin cells from the edge of the rash. |
Microscopy | |
Fungal Culture | Growing the fungus in a lab to confirm the specific TMVII genotype. |
How is TMVII treated?
The most critical distinction between TMVII and common fungal rashes is the treatment requirement. Standard topical creams and lotions are ineffective against this genotype. [5] Successful eradication of the fungus requires systemic treatment through oral antifungal medications, such as terbinafine or itraconazole. [4] [5]
The duration of treatment can be extensive, usually lasting 6 to 12 weeks and sometimes longer, until the rash has fully cleared; courses shorter than 2 weeks do not work. [5] Patients must complete the entire course of medication to prevent recurrence. [4] During the recovery period, it is essential to avoid using steroid creams, as these can actually worsen the fungal growth by suppressing the local immune response.
How can TMVII be prevented and managed with lifestyle changes?
Preventing the spread of TMVII involves both personal hygiene and open communication with partners. If an infection is suspected or confirmed, individuals should immediately notify recent sexual partners so they can seek testing and treatment. [5]
To prevent reinfection and protect others in the household, all clothing, bedding, and towels used by the infected individual should be washed and dried on high heat settings. [4] [5] This ensures that any fungal spores remaining on the fabric are destroyed. [5] Abstaining from sexual activity and close physical contact is necessary until a healthcare provider confirms the infection has been fully cleared. [4] [5]
Conclusion
Sexually transmitted fungal infection (TMVII) is a unique and potentially severe skin condition that requires professional medical attention. While its aggressive nature and resistance to topical treatments can be concerning, it is entirely curable with the correct oral antifungal regimen. Early detection, complete treatment adherence, and proactive partner notification are the cornerstones of managing this condition and preventing its further spread.
What are the next steps if you think you have TMVII?
If you notice a persistent, itchy, or painful circular rash in the genital area or on your legs, consult a healthcare professional immediately. Inform your provider if you have used topical antifungal creams without success, as this is a key indicator of a possible TMVII infection.
Trusted resources: Cleveland Clinic: Sexually Transmitted Fungal Infections · CDC: Clinical Overview of TMVII
Related reading on Rinnit: Fungal Infections (Mycosis) · Sexually Transmitted Diseases (STDs) Guide · Tinea Versicolor · Anal Yeast Infection · Granuloma Annulare
Frequently Asked Questions
What makes TMVII different from jock itch?
TMVII is specifically a sexually transmitted genotype that is more aggressive and resistant to the topical creams typically used for jock itch.
Can condoms prevent TMVII?
Condoms and dental dams provide some protection, but the fungus can still spread if the rash is located on an area not covered by the barrier.
Why don't antifungal creams work on TMVII?
This specific genotype of Trichophyton mentagrophytes is resistant to topical applications and requires systemic oral medication to be cleared.
Is TMVII the same as a yeast infection?
No. While both are fungal, TMVII is a type of ringworm and is primarily sexually transmitted, unlike yeast infections.
How long does it take to cure TMVII?
Treatment with oral medicine typically lasts 6 to 12 weeks and may need to continue until the rash has fully cleared.
Can I get TMVII from a towel?
Yes, the fungus can spread by sharing personal items like towels, bedding, or sex toys that have come into contact with the rash.
What happens if TMVII is left untreated?
Untreated infections can lead to secondary bacterial infections requiring hospitalization and may cause permanent skin scarring.
Should I use steroid cream for the itching?
No. Steroid creams should be avoided as they can suppress the immune system's ability to fight the fungus, making the infection worse.
Is TMVII common?
TMVII is an emerging infection that has been primarily observed in specific high-risk groups, but anyone exposed to the fungus can become infected.
Can TMVII affect the face?
Yes, the rash can appear on the face, as well as the genitals, buttocks, and legs.
How is the diagnosis confirmed?
A provider confirms the diagnosis by testing a skin scraping under a microscope or through a fungal culture.
Do I need to tell my partner if I have TMVII?
Yes, it is essential to notify recent partners so they can be tested and treated to prevent further transmission.
Is a fever common with TMVII?
A high fever is not a typical symptom of the fungus itself but may indicate a secondary bacterial infection that requires emergency care.
Can I have sex while being treated?
It is recommended to avoid sexual activity until the treatment is complete and a provider confirms the infection is gone.
How should I wash my bedding during treatment?
All linens and clothing should be washed and dried on high heat to kill any remaining fungal spores.
References
Reid C, Adnan Asif Ali M, Saivanya L, et al. First draft genome sequence of the emerging sexually transmitted dermatophyte Trichophyton mentagrophytes genotype VII. Med Mycol. 2026;64(9). PMID 42684036. https://doi.org/10.1093/mmy/myag065
Jabet A, Coron N, Schuttler C, et al. Diversity of ITS genotypes in Trichophyton mentagrophytes species complex isolates causing tinea corporis and tinea capitis: a multicenter study in France. Med Mycol. 2026;64(9). PMID 42726028. https://doi.org/10.1093/mmy/myag098
Guarina S, Darvishzadeh A, Bittencourt C, Andrade RM. First cases of suspected sexual transmission of genotypes VII and VIII in Orange County, California, USA. ASM Case Rep. 2026;2(5). PMID 42683032. https://doi.org/10.1128/asmcr.00011-26
Centers for Disease Control and Prevention. Clinical Overview of TMVII. Ringworm. October 8, 2026. https://www.cdc.gov/ringworm/hcp/clinical-overview/tmvii.html
Cleveland Clinic. Sexually Transmitted Fungal Infection (TMVII). Cleveland Clinic. December 6, 2024. https://my.clevelandclinic.org/health/diseases/sexually-transmitted-fungal-infection
Medical Disclaimer
This content is for informational purposes only and does not constitute medical advice. Always seek the guidance of a qualified healthcare provider regarding a medical condition or health concerns.
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