antifungal susceptibility – Page 5

ESCMID-EFISG Survey on Diagnostic and Therapeutic Capacity for Invasive Fungal Infections in Belgium, the Netherlands, and Luxembourg: A Focus on High Azole Resistance

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This survey examined how well hospitals in Belgium, the Netherlands, and Luxembourg can diagnose and treat serious fungal infections, which are particularly dangerous for people with weakened immune systems. The researchers found that while most hospitals can test fungal samples, not all have access to all necessary diagnostic tools, especially tests for detecting resistant fungi and identifying fungal co-infections. Many hospitals outsource their testing to other facilities, which can delay diagnosis and treatment, and some hospitals lack access to all recommended antifungal medications.

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

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Researchers in Thailand identified five patients with a new type of fungal skin infection caused by Trichophyton indotineae, a species that resists the common antifungal drug terbinafine. These infections appeared as rashes on various parts of the body and required treatment with alternative medications like itraconazole. The findings represent the first confirmed cases in Thailand and suggest this resistant fungus may be spreading globally. The study also showed that a simple urease test could help doctors identify this resistant strain quickly without waiting for complex genetic testing.

Prevalence of Candida and Other Yeasts in Vulvovaginal Infections during Pregnancy: A 10-Year Serbian Survey

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This 10-year study from Serbia examined vaginal yeast infections in nearly 2,200 pregnant women. Researchers found that yeast infections occurred in about 48% of symptomatic pregnant women, with Candida albicans being the most common cause. Importantly, the study discovered that other yeast species are increasingly important in these infections, and new identification methods (MALDI-TOF MS) revealed these species are often misidentified by traditional laboratory methods. The findings suggest that accurate yeast identification is essential for choosing the right treatment during pregnancy.

Evaluation of the Cytotoxicity and Antifungal Efficacy of Crocus sativus (saffron) Petals on Clinical Isolates of Candida albicans

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Researchers tested saffron petals as a natural antifungal treatment against Candida albicans, a common fungal infection. While the saffron extract was less potent than the standard drug fluconazole, it showed promise as a safer alternative with minimal toxicity to human cells. The findings suggest saffron petals could be a cost-effective herbal option for treating fungal infections, especially as resistance to conventional antifungals increases.

Fungal Keratitis Caused by Humicola sardiniae

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A 78-year-old man developed a serious fungal eye infection caused by Humicola sardiniae, a fungus rarely seen in humans. The infection was difficult to treat because the fungus was resistant to most antifungal medications, and continued use of steroid eye drops worsened the condition. After switching to appropriate antifungal treatment and stopping the steroids, the patient’s cornea eventually healed over four months, though this was the first documented case of this particular fungus infecting a human.

Loss of the Aspergillus fumigatus spindle assembly checkpoint components, SldA or SldB, generates triazole heteroresistant conidial populations

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This research reveals that disabling certain cell division checkpoint proteins in the fungus Aspergillus fumigatus creates populations resistant to triazole antifungal drugs. The resistant fungal cells appear to have abnormal amounts of genetic material, suggesting that loss of these checkpoint controls allows cells with extra chromosomes to survive drug exposure. This discovery provides new insight into how dangerous fungal infections can develop resistance to our most important antifungal treatments.

Clinico-mycological study of superficial mycoses and correlation with anti-fungal susceptibility among the Candida isolates in a teaching institution of Western India

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This study examined fungal skin infections in 330 patients in Western India, identifying which fungi cause these infections and which antifungal drugs work best. Researchers found that Candida yeasts were especially common in nail infections while Trichophyton fungi were more common in skin infections. The antifungal drug caspofungin was most effective against Candida, while the commonly used drug fluconazole showed increasing resistance.

Isavuconazole: Need for therapeutic drug monitoring and CYP polymorphism testing

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A patient with a serious fungal infection of the sinuses caused by Rhizopus arrhizus received the antifungal drug isavuconazole. However, blood tests showed the drug was building up to dangerously high levels in her body. Genetic testing revealed she had a mutation that made her body unable to break down the drug normally. The doctors had to give her much smaller and less frequent doses while carefully monitoring her drug levels to keep her safe.

Host-induced climate change: Carbon dioxide tolerance as a Cryptococcus neoformans virulence trait

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When fungi like Cryptococcus neoformans infect humans, they face dramatically higher levels of carbon dioxide in the body compared to the environment. This research shows that the ability to tolerate this higher CO2 is a key virulence factor that helps the fungus cause disease. Scientists discovered that clinical isolates from infected patients are generally better at tolerating CO2 than environmental strains, and this tolerance correlates with how severe infections become.

Recalcitrant dermatophytosis due to Trichophyton indotineae: A case series from Sarawak, Malaysia

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Three patients in Malaysia had persistent skin fungal infections caused by Trichophyton indotineae that did not respond to standard antifungal treatments. Genetic testing revealed these fungal strains carried a specific mutation making them resistant to terbinafine, the typical first-line treatment. While azole-based antifungals showed variable effectiveness depending on the specific drug and dose used, one patient achieved complete cure with voriconazole therapy. The study highlights the growing problem of drug-resistant fungal infections and the importance of targeted treatment based on laboratory testing.

Research Keyword: antifungal susceptibility