A New Sexually Transmitted Fungal Infection, Trichophyton Mentagrophytes Type VII (TMVII), Has Been Reported For The First Time

The realm of sexually transmitted infections (STIs) has long been dominated by discussions surrounding viral and bacterial pathogens, but a new threat is emerging – ...

by Arie Jansen

A New Sexually Transmitted Fungal Infection, Trichophyton Mentagrophytes Type VII (TMVII), Has Been Reported For The First Time

The realm of sexually transmitted infections (STIs) has long been dominated by discussions surrounding viral and bacterial pathogens, but a new threat is emerging – sexually transmitted fungal infections.

Recent reports have highlighted the rise of a rare and highly contagious fungal infection known as Trichophyton mentagrophytes type VII (TMVII), which has been identified for the first time in the United States. This development has raised concerns among public health officials and medical professionals, as TMVII has the potential to spread rapidly and can be challenging to diagnose and treat effectively.

What Is TMVII?

TMVII, also known as Tungsten Molybdenum Vanadium alloy, is a type of high-temperature alloy used in various industrial applications. It is a refractory metal alloy, characterized by its exceptional high-temperature strength, resistance to thermal shock, and excellent corrosion resistance.

TMVII is often used in the production of heat exchangers, furnace components, and other high-temperature equipment due to its ability to withstand extreme temperatures up to 2,300°F (1,260°C). Its unique properties make it an ideal material for applications where high-temperature resistance and corrosion resistance are critical, such as in the aerospace, chemical processing, and power generation industries.

Additionally, TMVII is also used in the production of cutting tools, wear-resistant parts, and other components that require high-temperature resistance. Overall, TMVII is a versatile alloy that offers a unique combination of properties, making it an essential material in various industrial applications.

The First Case In The United States

The first confirmed case of TMVII in the United States was reported in June 2024 by a man in his 30s from New York City. The patient had developed a severe case of ringworm on his genital area, buttocks, and limbs after engaging in sexual activity with multiple partners during recent trips to England, Greece, and California. Initially, the condition was misdiagnosed as eczema, but further testing revealed the presence of the TMVII fungus.

Symptoms And Transmission

TMVII manifests as a highly contagious skin infection that can cause intense itching, inflamed circular patterns on the skin, hair and nail issues, and athlete’s foot-like symptoms. The infection is primarily transmitted through sexual contact, including vaginal, anal, and oral sex, but it can also spread through skin-to-skin contact or sharing of personal items like towels and clothing.

  • Weakness and numbness of the limbs
  • Deficits in sensation and motor skills
  • Dysfunctional urethral and anal sphincter activities
  • Dysfunction of the autonomic nervous system, which can lead to episodes of high blood pressure
  • Sensory symptoms may include a sensation of pins and needles traveling up from the feet
  • The degree and type of sensory loss will depend upon the extent of the involvement of the various sensory tracts
  • Back pain can occur at the level of any inflamed segment of the spinal cord
  • The exact cause of TMVII is unknown, but it is believed to be triggered by various infections, immune system disorders, or damage to nerve fibers
  • Viral, bacterial, and fungal infections, as well as autoimmune diseases, are known to trigger the condition
  • TMVII can also occur without any known underlying cause or trigger
  • The condition is rare, with approximately 1 to 8 new cases per 1 million people per year in the US
  • There is no known way to transmit TMVII from person to person, as it is not contagious

Global Spread And Implications

While TMVII is a newly identified threat in the United States, it has been reported in several countries around the world, particularly among men who have sex with men and travelers who have visited Southeast Asia. In France, 13 cases were reported among men who have sex with men, while in Germany, 37 cases were identified over an 18-month period, with only a small proportion of cases associated with travel outside the country.

The global spread of TMVII highlights the potential for this infection to become a significant public health concern. Its contagious nature, combined with the potential for misdiagnosis and difficulty in treatment, creates a perfect storm for rapid transmission and widespread impact.

Trichophyton indotinea

Trichophyton indotinea is a newly identified dermatophyte species that has been found in a near-epidemic form on the Indian subcontinent. This fungus is identical to genotype VIII within the T. mentagrophytes/T. interdigital species complex, which was described in 2019 by sequencing the Internal Transcribed Spacer (ITS) region of ribosomal DNA of the dermatophyte.

Trichophyton indotinea causes inflammatory and itchy, often widespread, dermatophytosis affecting the groins, gluteal region, trunk, and face. Patients of all ages and genders are affected. The fungus has largely displaced other previously prevalent dermatophytes on the Indian subcontinent and has spread to several countries worldwide.

Its emergence has led to a significant increase in cases of recalcitrant dermatophytosis, particularly in India and neighboring countries. The fungus is predominantly transmitted from person to person and often leads to refractory dermatophytosis. The most efficacious drug currently available for this terbinafine-resistant dermatophytosis is itraconazole.

Sexually Transmitted Infections (STIs)

Sexually transmitted infections (STIs), previously known as sexually transmitted diseases, involve the transmission of an organism between sexual partners through different routes of sexual contact, either oral, anal, or vaginal.

STIs affect all people and can be prevented with proper education and barrier control. STIs are caused by pathogens transmitted from person to person through sexual contact and can be caused by bacteria, viruses, or parasites. They have a devastating impact on adults and infants, affecting millions of people in the United States annually.

Symptoms of STIs can include unusual discharge from the vagina, penis, or anus, and some STIs may have no symptoms at all. STIs are preventable, and knowing how to protect oneself and one’s sex partner(s) is crucial. Treatment of STIs typically involves antibiotics, antiviral medications, or other medications, and prompt treatment can help prevent long-term health complications and reduce the risk of transmission to others.

Treatment Challenges

One of the most concerning aspects of TMVII is the challenge it poses in terms of treatment. While the infection responds to standard antifungal therapies like terbinafine, it can take several months for the infection to fully clear up, even with proper treatment. This prolonged duration of treatment can lead to compliance issues, as patients may become frustrated with the slow progress and discontinue their medication prematurely, leading to a relapse of symptoms.

Additionally, the misdiagnosis of TMVII as a more common skin condition like eczema can delay proper treatment, allowing the infection to spread further before appropriate measures are taken.

Public Health Response

In light of the emergence of TMVII in the United States, public health officials and medical professionals have called for a coordinated response to address this growing threat. Several key recommendations have been made:

Physician Awareness And Education

Healthcare providers must be made aware of the signs and symptoms of TMVII, as well as its potential for sexual transmission. They should be trained to ask patients about rashes around the groin and buttocks, especially for those who are sexually active, have recently traveled abroad, and report itchy areas elsewhere on the body. Proper diagnosis through laboratory testing is crucial to ensure timely and appropriate treatment.

Public Awareness Campaigns

Public awareness campaigns can play a vital role in educating individuals about the risks and symptoms of TMVII. By raising awareness, people can be encouraged to seek medical attention promptly if they experience any unusual skin conditions, particularly after engaging in sexual activity or traveling to areas where TMVII has been reported.

Promoting Safe Sexual Practices

As TMVII is primarily transmitted through sexual contact, promoting safe sexual practices is essential. Public health campaigns should emphasize the importance of using condoms and dental dams, as well as encouraging open communication between partners about their sexual health histories.

Surveillance And Reporting

Robust surveillance systems and reporting mechanisms must be put in place to track the spread of TMVII and other emerging sexually transmitted fungal infections. This data can inform public health policies and resource allocation to effectively combat these threats.

Research And Development

Continued research into the epidemiology, transmission patterns, and treatment options for TMVII and other sexually transmitted fungal infections is crucial. Developing new diagnostic tools and more effective antifungal therapies can help improve patient outcomes and reduce the burden on healthcare systems.

Sum up

The emergence of TMVII in the United States serves as a stark reminder that the fight against sexually transmitted infections is an ever-evolving battle. While viral and bacterial pathogens have long been the focus of public health efforts, the rise of sexually transmitted fungal infections like TMVII highlights the need for a comprehensive and coordinated response.

By raising awareness among healthcare professionals and the general public, promoting safe sexual practices, and investing in research and surveillance, we can address the threat posed by TMVII and protect public health. It is essential that we remain vigilant and adaptable, as the landscape of sexually transmitted infections continues to evolve, presenting new challenges that require swift and effective action.


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