Opportunistic infections

Emergence of Rhodotorula mucilaginosa among pet animals: a possible public health risk on the move

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Researchers discovered that a fungus called Rhodotorula mucilaginosa is increasingly infecting pet dogs and cats, particularly in their ears and nasal passages. This yeast was previously thought to be harmless but is now recognized as a disease-causing pathogen that shows resistance to many common antifungal medications. The study raises important concerns about the potential transmission of this infection from pets to their human caregivers, suggesting pet owners should be aware of this emerging health risk.

The 2025 EQUAL Pneumocystis Score—an ECMM tool to measure QUALity in Pneumocystis pneumonia management

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Pneumocystis pneumonia is a serious lung infection that affects people with weakened immune systems, including those with HIV and transplant patients. Doctors use different guidelines to diagnose and treat this infection, but these guidelines are complex and can be hard to follow consistently. Researchers created a new scoring system called the EQUAL Pneumocystis Score that helps doctors follow the best treatment recommendations by assigning points for different diagnostic tests, medications, and follow-up strategies.

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.

Disseminated mucormycosis leading to a fatal gastrointestinal perforation in a pediatric case of EBV-associated Hemophagocytic lymphohistiocytosis

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A 12-month-old girl with a severe immune system disorder (HLH) triggered by Epstein-Barr virus developed a life-threatening fungal infection (mucormycosis) that spread throughout her digestive system. Despite aggressive treatment with multiple antifungal medications and emergency surgery, the infection caused her intestines to perforate, leading to her death. The case highlights the difficulty in recognizing fungal infections early in immunocompromised children and the need for heightened clinical awareness.

The dimorphic fungus Talaromyces marneffei: An opportunistic killer in Southeast Asia

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Talaromyces marneffei is a dangerous fungus found in Southeast Asian soils that causes serious lung infections when people breathe in its spores. The fungus has a clever trick: it transforms into different forms depending on temperature and hides inside immune cells by tricking them. People with weak immune systems, particularly those with advanced HIV/AIDS or certain genetic conditions, are most vulnerable to severe disease.

Population structure in a fungal human pathogen is potentially linked to pathogenicity

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Aspergillus flavus is a common fungal infection found in both hospitals and the environment. Researchers studied the genetic makeup of 300 fungal samples from patients and the environment across multiple countries. They discovered that clinical isolates cluster into specific genetic groups, with one group containing most patient-derived samples. This finding suggests that certain genetic populations of this fungus may be better adapted to infecting humans than others.

Sarocladium implicatum: an unusual agent of opportunistic infection in a COVID-19 patient

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A patient hospitalized with severe COVID-19 developed an unusual infection caused by a mold called Sarocladium implicatum, which typically affects plants. Due to weakened immune system from his illness and medications, the fungus spread to his bloodstream and lungs, causing persistent fever and a cavity in his lung. After molecular testing identified the fungus, he was treated with an antifungal medication called voriconazole, which successfully cured the infection.

Invasive Trichoderma longibrachiatum breakthrough infection in a hematology patient

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A 61-year-old woman with blood cancer developed a severe and unusual double fungal infection caused by two mold species while being treated for a known fungal infection. Despite receiving multiple antifungal medications, her condition worsened and she ultimately died from multiple organ failure. The case is important because it demonstrates how Trichoderma fungi are becoming dangerous pathogens in very sick, immunocompromised patients, and a new drug called olorofim showed promising activity against this infection in laboratory tests.

Access to diagnostic testing for invasive fungal diseases and other opportunistic infections in Mexican health care centers caring for patients living with HIV

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This study examined the availability of diagnostic tests for fungal and other serious infections in Mexican HIV clinics. Researchers found that most clinics, especially smaller primary care facilities, lack modern rapid testing equipment needed to quickly diagnose dangerous infections like cryptococcosis and histoplasmosis. These infections are common in people with advanced HIV and can be life-threatening, making access to rapid diagnosis crucial for treatment and survival.

Research Topic: Opportunistic infections