Research Keyword: MIC testing

Feline Cryptococcosis due to Cryptococcus gattii VGII (Recently Renamed as C. deuterogattii) in an FIV-Positive Cat With Demodicosis From Manaus, Central Amazon, Brazil

A 20-month-old cat from Brazil’s Amazon region presented with nasal discharge, skin lesions, and a neck mass and was diagnosed with cryptococcosis caused by a dangerous fungus called C. deuterogattii. The cat was also infected with feline immunodeficiency virus (FIV), which weakened its immune system and made it vulnerable to the fungal infection. Treatment with the antifungal medication fluconazole successfully cured the infection within 8 weeks, and the cat made a full recovery.

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

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.

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The In vitro Effect of Nanoliposomal Amphotericin B Against Rhizopus arrhizus Isolated From COVID-19-Associated Mucormycosis Patients

Scientists tested a new nano-formulation of the antifungal drug amphotericin B against a dangerous fungus (Rhizopus arrhizus) that infected COVID-19 patients with mucormycosis. The nanoliposomal version of the drug worked much better than regular amphotericin B and other antifungal medications currently used, showing much lower concentrations needed to kill the fungus. This research suggests the new nano-formulation could be a more effective treatment option for patients with this serious COVID-19 related fungal infection.

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Phaeoacremonium iranianum – a new corneal pathogen

A 66-year-old man developed a serious eye infection from a fungus called Phaeoacremonium iranianum after his eye was scratched by a leaf. This is the first reported case of this fungus causing a corneal infection. Doctors treated the infection with antifungal eye drops and surgery to remove infected tissue, and the patient’s condition improved over time, though with some permanent scarring of the cornea.

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The transcription factor RttA contributes to sterol regulation and azole resistance in Aspergillus fumigatus

Researchers corrected the mislabeled rttA gene in the dangerous fungus Aspergillus fumigatus and discovered it acts as a master control switch for sterol production and antifungal drug resistance. When this gene is active, it helps fungi survive azole medications by boosting production of ergosterol, a critical component of fungal cell membranes. This discovery reveals how fungi develop resistance to our frontline antifungal treatments and suggests new ways to combat these life-threatening infections.

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