Mycology – Page 12

Cryptococcus: Emerging host risk factors for infection

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This scientific review examines why some people without HIV are getting serious Cryptococcus infections and becoming very sick. Researchers found that people with liver problems, kidney disease, diabetes, cancer, and autoimmune diseases face much higher risk. The review also identifies new drugs and therapies that can surprisingly increase infection risk, highlighting the importance of understanding individual patient factors when treating these dangerous fungal infections.

Clinical Significance and Therapeutic Challenges of Scedosporium spp. and Lomentospora prolificans Isolates in a Single-Center Cohort of Lung Transplant Recipients

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This study examined rare but serious fungal infections caused by Scedosporium and Lomentospora in lung transplant patients. Of 576 transplant recipients, 11 (2%) developed these infections, which are difficult to treat due to natural resistance to most antifungal medications. The infection type greatly influenced outcomes, with disseminated Lomentospora infections causing 100% mortality despite treatment. The research highlights the urgent need for new diagnostic methods and more effective antifungal drugs to combat these emerging pathogens.

Black mold in the bag room: First case of Arthrocladium tropicale peritonitis in a peritoneal dialysis patient

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A peritoneal dialysis patient contracted a rare fungal infection caused by Arthrocladium tropicale, a mold found in damp environments and associated with ant nests. The infection was diagnosed through microscopy and genetic testing, revealing resistance to one antifungal drug but susceptibility to amphotericin B. Treatment with this antibiotic and removal of the dialysis catheter led to full recovery, highlighting the importance of keeping medical equipment storage areas dry and pest-free.

Epidemiology of mucormycosis in COVID-19 patients in northwest Iran: Rhizopus arrhizus as the predominant species

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During the COVID-19 pandemic, a dangerous fungal infection called mucormycosis was found in 63 patients in northwestern Iran. The infection was caused mainly by a fungus called Rhizopus arrhizus and most commonly affected the sinuses and brain. Most patients had been given high-dose steroids to treat their COVID-19, which weakened their immune systems and increased their risk of this serious fungal infection, especially those with diabetes.

Select and Resequence Methods Enable a Genome-Wide Association Study of the Dimorphic Human Fungal Pathogen Coccidioides posadasii

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Scientists developed a new method to understand how different strains of the fungus Coccidioides posadasii, which causes Valley Fever, respond to temperature changes. By mixing multiple fungal strains together and sequencing their DNA after growing them at different temperatures, they identified a gene that helps determine whether the fungus grows better in hot (body temperature) or cool (environmental) conditions. This discovery could help explain how this dangerous fungus adapts to human infection and may lead to better treatments for Valley Fever.

Identification and Biological Characteristics of Alternaria gossypina as a Promising Biocontrol Agent for the Control of Mikania micrantha

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Researchers in China identified a fungus called Alternaria gossypina that causes leaf disease in Mikania micrantha, a highly invasive plant threatening ecosystems worldwide. Through laboratory testing, they confirmed the fungus can effectively damage and control this invasive weed and determined the best growing conditions for mass-producing this beneficial fungus. This discovery offers a promising natural and environmentally friendly solution to control M. micrantha spread, as an alternative to harmful chemical pesticides or labor-intensive manual removal.

Re-Identification of Aspergillus Subgenus Nidulantes Strains and Description of Three Unrecorded Species From Korea

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Researchers in Korea re-examined 53 fungal samples from the Korean Agricultural Culture Collection to accurately identify Aspergillus species. Using genetic analysis and microscopic examination, they confirmed 14 different species, including three that were new to Korea: A. griseoaurantiacus, A. puulaauensis, and A. sublatus. These findings help scientists better understand which fungal species are present in Korea and their potential impacts on food, air quality, and human health.

Convergent evolution links molybdenum insertase domains with organism-specific sequences

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Scientists studied how fungi use a special protein called Mo insertase to create molybdenum cofactor, which is essential for life. By testing different versions of this protein from various organisms, they discovered that fungi have developed a unique version with a special 20-amino acid region that cannot be replaced with versions from plants or animals. This finding shows that evolution has fine-tuned this protein differently in different organisms.

Cell wall remodeling in a fungal pathogen is required for hyphal growth into microspaces

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Researchers discovered how fungi squeeze through tiny spaces inside plant tissues to cause disease. They found that fungi need to soften and remodel their cell walls to reduce their width and fit through spaces that are much narrower than normal fungal filaments. This ability to change shape is critical for the fungus to invade and colonize plants, ultimately causing wilting diseases in crops like tomatoes.

Stonebrood Disease—Histomorphological Changes in Honey Bee Larvae (Apis mellifera) Experimentally Infected with Aspergillus flavus

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Stonebrood is a rare fungal disease of honey bees caused by Aspergillus flavus that can kill bee larvae very quickly. Researchers experimentally infected bee larvae with the fungus and tracked how the disease progressed, finding that larvae died within 48 hours of infection. The study revealed that the fungus likely kills bees by producing toxins rather than by physical damage, and poses a health risk to beekeepers who inhale the fungal spores.

Research Topic: Mycology