dermatophyte infections

Rediscovery of viomellein as an antibacterial compound and identification of its biosynthetic gene cluster in dermatophytes

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Researchers discovered that skin-infecting fungi called dermatophytes produce a red pigment called viomellein that kills bacteria. By studying the genes responsible for making viomellein, scientists found that this compound may help dermatophytes establish infections by eliminating competing bacteria on the skin. This discovery could explain how these fungi successfully colonize human skin and may lead to new treatment strategies for stubborn fungal infections.

Epidemiology of Onychomycosis in the United States Characterized Using Molecular Methods, 2015–2024

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This large study examined over 710,000 nail samples to identify which fungi cause nail infections in the United States. Using modern molecular testing combined with microscopic analysis, researchers found that while the fungus T. rubrum is most common, other molds and yeasts cause many infections too. Importantly, women and older adults are more likely to have infections from these other organisms, which are often harder to treat with standard antifungal medications.

Genome characterization of Trichophyton mentagrophytes genotype VII strain PG12DES from Italy

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Researchers in Italy analyzed the genetic makeup of a fungus called Trichophyton mentagrophytes that causes skin infections and appears to spread between people through sexual contact. The fungal strain studied was susceptible to all tested antifungal medications and shared similarities with a strain previously found in Moldova. This study helps doctors understand how this emerging fungal infection spreads globally and whether it’s developing resistance to treatments.

Synthesis, Physicochemical Properties and Anti-Fungal Activities of New Meso-Arylporphyrins

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Researchers created three new porphyrin compounds that effectively kill fungal infections like Candida and athlete’s foot fungi. These compounds can also generate singlet oxygen when exposed to light, making them potentially useful for photodynamic therapy treatments. Testing showed they inhibited fungal growth at relatively low concentrations, suggesting they could become new antifungal medications.

Spread of Antifungal-Resistant Trichophyton indotineae, United Kingdom, 2017–2024

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A dangerous fungal infection called Trichophyton indotineae is rapidly spreading across the United Kingdom, particularly among people with connections to South Asia. This infection causes stubborn skin rashes that don’t respond well to common antifungal treatments like terbinafine. The number of cases has skyrocketed, making up 38% of all dermatophyte infections by 2024, and doctors need to be aware of this emerging threat.

Single-center retrospective analysis of 454 culture-positive patients with tinea capitis and measurement of pathogens regarding thermal tolerance at 37°C

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Tinea capitis, commonly known as scalp ringworm, is a fungal infection that primarily affects children but can also occur in adults, especially postmenopausal women. This study of 454 patients in Hangzhou, China found that the most common cause is Microsporum canis (a fungus from cats and dogs), representing a shift from previous decades when different fungi were dominant. Researchers tested how well these fungi grow at human body temperature (37°C) versus room temperature, finding that most fungi adapt well to the warmer temperature, particularly Nannizzia gypsea, which grew equally well at both temperatures. Treatment typically involves oral antifungal medications like terbinafine or itraconazole, sometimes combined with topical treatments or steroids for inflammatory cases.

Emergence of resistant dermatophytosis caused by Trichophyton indotineae: First case series in Thailand

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Doctors in Thailand have identified a new drug-resistant fungal infection caused by Trichophyton indotineae, a fungus that doesn’t respond to common antifungal medication terbinafine. Five patients were diagnosed with this resistant skin infection that caused rashes on various body parts and failed to improve with standard treatments. The research shows that a simple urease test can help doctors quickly identify this resistant fungus, and a different drug called itraconazole appears to work better for treatment. This is the first time this resistant fungus has been confirmed in Thailand, suggesting it is spreading globally.

Spread of Antifungal-Resistant Trichophyton indotineae, United Kingdom, 2017–2024

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A highly resistant fungal infection called Trichophyton indotineae is rapidly spreading throughout the United Kingdom. Originally from southern Asia, this fungus causes difficult-to-treat skin infections, particularly in the groin area, and resists standard antifungal medications in about three-quarters of cases. Since 2023, cases have spread from London to other parts of the UK and Ireland, and experts predict it will soon become the leading cause of ringworm in the country.

Synergistic effects of Cyp51 isozyme-specific azole antifungal agents on fungi with multiple cyp51 isozyme genes

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This study found that different azole antifungal drugs work better against different versions of an enzyme (Cyp51) that fungi need to survive. By combining two azole drugs that each target different enzyme versions, researchers achieved stronger antifungal effects than either drug alone. This discovery suggests a new strategy for treating stubborn fungal infections by carefully selecting drug combinations based on which enzyme versions the fungus possesses.

Safety and Efficacy of a 48-Month Efinaconazole 10% Solution Treatment/Maintenance Regimen: 24-Month Daily Use Followed by 24-Month Intermittent Use

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Researchers studied a 4-year treatment plan for toenail fungal infections using efinaconazole, an antifungal solution applied daily for 2 years, then 2-3 times weekly for another 2 years. The treatment was safe and effective, with all patients who achieved a cure maintaining it through the maintenance phase, and even some non-cured patients improving further. The study included many elderly patients, showing the treatment is safe across all age groups and could help prevent infection relapse.

Research Keyword: dermatophyte infections