opportunistic infection

Pathogenic potential of polyextremotolerant fungi in a warming world

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Certain fungi can survive extremely harsh conditions like extreme temperatures and dry environments, and many of these same species can cause infections in humans. As the planet warms due to climate change, these fungi are becoming better adapted to higher temperatures, which makes them more dangerous as human pathogens. Scientists are working to better understand these fungi and develop new treatments and vaccines to protect people from fungal infections.

Humans vs. Fungi: An Overview of Fungal Pathogens against Humans

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Fungal infections are serious health threats that kill approximately 1.5 million people annually worldwide. This comprehensive review identifies over 280 different fungal species that can infect humans, with Aspergillus being the most dangerous genus. The study provides updated information on how these infections are diagnosed through various methods including cultures, microscopy, and molecular testing, as well as treatment options ranging from traditional antifungal drugs to newer therapies like nanotechnology-based formulations.

Mediastinal cryptococcoma as part of disseminated cryptococcosis in HIV-negative pregnant woman with Myasthenia Gravis: Autopsy case report

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A 29-year-old pregnant woman with myasthenia gravis, a condition requiring long-term immune-suppressing medications, died from a widespread fungal infection caused by Cryptococcus. Despite being HIV-negative, her weakened immune system made her vulnerable to this serious infection. An autopsy revealed the infection had spread throughout her body, including her heart, brain, lungs, and kidneys. This case highlights how fungal infections like cryptococcosis can affect people without HIV when their immune systems are compromised by other conditions or medications.

Differential composition of the pulmonary microbiome in HIV-positive versus HIV-negative patients with Pneumocystis jirovecii

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This study compared lung infections in HIV-positive and HIV-negative patients who both had Pneumocystis jirovecii. Researchers found that HIV-positive patients had more diverse microorganisms in their lungs, particularly viruses, yet generally did better. HIV-negative patients had fewer types of microorganisms but worse outcomes. The findings suggest that the way a person’s immune system is weakened matters more than just having many germs present.

Three new species of Talaromyces sect. Talaromyces discovered in China

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Scientists in China discovered three new species of Talaromyces fungi in soil samples using a combination of physical observation and genetic analysis. These fungi are important because they help break down plant material, produce useful enzymes for industry, and create compounds with potential medical value. The research adds to our understanding of fungal diversity and demonstrates how traditional isolation methods remain crucial for discovering new microorganisms and their applications.

Timely diagnosis and management of Quambalaria cyanescens-induced peritoneal dialysis peritonitis: A rare case highlighting the role of galactomannan testing

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A 53-year-old man on peritoneal dialysis developed a rare fungal infection caused by Quambalaria cyanescens. Doctors used a special blood test (galactomannan testing) to quickly identify it as a fungal infection rather than a bacterial one, leading to timely removal of his dialysis catheter on day 5. After treatment with antifungal medications, he recovered completely with no relapses over two years of follow-up. This case shows the importance of proper hygiene during dialysis and using advanced diagnostic tools for rare infections.

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.

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.

Large language models and their performance for the diagnosis of histoplasmosis

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Researchers tested whether artificial intelligence chatbots like ChatGPT and Microsoft Copilot could help doctors diagnose histoplasmosis, a serious fungal infection affecting people with HIV/AIDS that is often missed. They presented 20 real patient case descriptions to different AI systems and found that Microsoft Copilot performed best, correctly identifying histoplasmosis in 90% of cases—about as good as laboratory tests. While the AI showed promise as a helpful tool to suggest this neglected disease during diagnosis, doctors would still need to verify findings with actual tests.

Geographical distribution of Cryptococcus neoformans in Iran, pathogenic factors, and antifungal susceptibility profile

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Researchers tested pigeon droppings from across Iran to find a dangerous fungus called Cryptococcus neoformans that can cause serious lung infections. They found this fungus in about 8.6% of samples, with more present in some provinces than others. The fungus showed concerning resistance to some common antifungal medications but remained sensitive to others like voriconazole, which could help guide treatment decisions.

Research Keyword: opportunistic infection