antifungal susceptibility – Page 4

Trichosporon Urinary Tract Infections: A Hidden Menace Revealed

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Trichosporon is a fungus that causes urinary tract infections primarily in hospitalized patients and those with weakened immune systems. This review found that Trichosporon asahii is the most common species responsible for these infections, especially in patients with prolonged hospital stays or using immunosuppressive medications. The drug voriconazole works best against this fungus, while some common antifungal medications like amphotericin B are less effective. Accurate identification using modern laboratory techniques is crucial for proper treatment.

Olorofim activity against multidrug-resistant Fusarium unveils intra-species and inter-species variability

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Researchers tested a new antifungal drug called olorofim against 253 different Fusarium fungi that infect humans. Fusarium is particularly dangerous for people with weakened immune systems and resists most common antifungals. The study found that olorofim works, but its effectiveness varies significantly depending on which type of Fusarium is present. While these lab results are promising, additional testing in animal models is needed before it can be used clinically.

Infection caused by a cryptic fungal species, Blastomyces gilchristii, in a tiger

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A tiger in Tennessee became ill with a serious fungal infection caused by a lesser-known fungus called Blastomyces gilchristii. While blastomycosis is typically caused by a different fungus species, this case represents the first detection of this particular cryptic fungal species in the southeastern United States. Scientists used advanced genetic sequencing to identify the fungus when standard laboratory methods failed. This discovery suggests that this dangerous fungus is spreading to areas where it was not previously thought to exist.

Pathogenic characterization of Phialophora submersa, a new black yeast isolated from freshwater sediments in Spain

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Scientists discovered a new black yeast fungus called Phialophora submersa in Spanish river sediments and tested whether it could infect humans. Using laboratory macrophage (immune cell) models, they found that this environmental fungus exhibits pathogenic potential similar to known disease-causing Phialophora species, though at intermediate levels. The fungus showed resistance to some antifungal drugs and displayed strain-dependent ability to survive various stress conditions. This research suggests that environmental fungal species may pose unexpected health risks despite not being able to grow at normal human body temperature.

Utility of MALDI-ToF MS for Recognition and Antifungal Susceptibility of Nannizzia, an Underestimated Group of Dermatophytes

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Nannizzia species are soil-dwelling fungi that increasingly cause stubborn skin, nail, and hair infections in humans and animals. This study tested two laboratory methods for identifying these fungi and measured their sensitivity to eight antifungal drugs. The faster liquid-based method was slightly more accurate (67%) than the traditional culture method (62%), though neither method could identify six very rare species. Terbinafine emerged as the most effective antifungal treatment in laboratory tests.

First isolation of Prototheca bovis from a bottlenose dolphin (Tursiops truncatus)

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A 13-year-old bottlenose dolphin at a Japanese aquarium developed a stomach infection caused by Prototheca bovis, a type of alga rarely found in marine animals. The dolphin initially received treatment with itraconazole for a suspected fungal infection, but this was ineffective. When doctors identified the actual culprit as P. bovis through genetic testing, they switched to fos-ravuconazole, which successfully resolved the infection and returned the dolphin to good health.

Genome characterization of Trichophyton mentagrophytes genotype VII strain PG12DES from Italy

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Researchers in Italy studied a fungal strain that causes skin infections, particularly ringworm and related conditions. This strain is spreading globally and can potentially be transmitted through sexual contact. The study found that the Italian strain is closely related to another strain found in Moldova and is susceptible to currently used antifungal medications. Understanding this fungus at the genetic level helps doctors monitor its spread and identify if it develops resistance to treatments.

Occurrence of Pathogenic and Allergenic Molds in the Outdoor and Indoor Environment of a Major Hospital and Molecular Epidemiology of Aspergillus fumigatus in Kuwait

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Researchers in Kuwait found many types of mold in and around a hospital, with some being resistant to common antifungal medications. They discovered that the same mold species were found both outdoors and in the hospital environment, suggesting patients could catch infections from the surrounding air. The study identified molds that could cause serious infections in vulnerable patients and found that about 10% of environmental samples contained drug-resistant strains that were also found in sick patients.

Research Topic: antifungal susceptibility