Publications by authors named "Wiederhold N"

We investigated the activity of the tuberculosis drug SQ109 against sixteen fungal pathogens: , , , , , , , , , spp., spp., spp.

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Candida species are the predominant cause of fungal infections in patients treated in hospital, contributing substantially to morbidity and mortality. Candidaemia and other forms of invasive candidiasis primarily affect patients who are immunocompromised or critically ill. In contrast, mucocutaneous forms of candidiasis, such as oral thrush and vulvovaginal candidiasis, can occur in otherwise healthy individuals.

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We report disseminated mycosis in a Belgian Malinois caused by . The dog presented for progressive hindlimb weakness after diagnosis of suspected bacterial discospondylitis. Magnetic resonance imaging combined with radiographs revealed multifocal discospondylitis, osteomyelitis, and spondylitis with epidural empyema.

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Unlabelled: Rapid and accurate identification of cultured molds is important to determine clinical significance and therapeutic decision-making. Conventional mold identification uses phenotypic macroscopic and microscopic characterization; however, this can take days or weeks for colony maturity and definitive microscopic structure formation, be limited to genus-level identification, and be misidentified due to morphologic mimics or similarities between closely related species. Matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) revolutionized bacterial and yeast identification but remains uncommon for molds in part because of limited reference libraries.

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Phaeohyphomycosis is an uncommon disease caused by dematiaceous fungi that is almost exclusively found in immunocompromised dogs. Here we describe the case of a dog treated with prednisone (1.1 mg/kg/day) and cyclosporine (11.

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Many microbial pathogens form biofilms, assemblages of polymeric compounds that play a crucial role in establishing infections. The biofilms of species also contribute to high antifungal resistance. Using our collection of 29 clinical isolates, we focused on characterizing differences in thermotolerance, anaerobic growth, and biofilm formation across four species complexes commonly found in clinical settings.

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Article Synopsis
  • Olorofim was tested against various species and showed strong effectiveness, with a minimum inhibitory concentration (MIC) range between 0.008 and 0.06 µg/mL.
  • Olorofim maintained its potent activity even against strains that had high fluconazole resistance (MICs of 16 µg/mL or more).
  • The overall geometric mean MIC for olorofim across all isolates was very low, at 0.010 µg/mL, indicating its potential as a valuable treatment option.
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Objectives: Reported amphotericin B resistance rates for Candida auris vary considerably. This may reflect clinically relevant differences in susceptibility, technical issues with testing, or adoption of a clinical breakpoint that bisects the wild-type population. We compared reference methods and two gradient diffusion strips using a shared C.

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A 2-y-old, intact female, mixed-breed dog was presented to the veterinary hospital with abdominal distension, anemia, and lethargy following a chronic history of nonspecific gastrointestinal signs. CBC and serum biochemistry revealed moderate nonregenerative anemia with neutrophilia, hypoalbuminemia, hyperglobulinemia, hypoglycemia, decreased urea and creatinine, and hypercholesterolemia. Abdominal radiographs and ultrasound revealed a large heterogeneous mesenteric mass and ascites.

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A 6-year-old male neutered boxer mix canine was presented for a one-month history of dyschezia, hematochezia, and constipation. Colonoscopy and endoscopic biopsies revealed non-specific lymphoplasmacytic, eosinophilic colitis. Despite pursuing various therapies over a 3.

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  • The study investigated nikkomycin Z's effectiveness in treating central nervous system coccidioidomycosis in mice, showing significant improvements in survival and reduction of brain fungal burden compared to control.
  • Mice were given nikkomycin Z at doses of 50, 100, and 300 mg/kg three times daily, or fluconazole, starting two days post-inoculation with the fungus.
  • Nikkomycin Z targets fungal cell walls, making it a potentially safer treatment option than traditional antifungals, which can have adverse effects due to interactions with human enzymes.
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  • - This mini-review analyzes the clinical outcomes and antifungal susceptibility of three new antifungals: fosmanogepix, ibrexafungerp, and rezafungin, based on isolates from clinical trial patients.
  • - Antifungal susceptibility data primarily comes from the CLSI broth microdilution method or a combination of CLSI and EUCAST methodologies, with specific in vitro results reported for fosmanogepix, ibrexafungerp, and rezafungin.
  • - Overall, the findings provide insights into the effectiveness of these antifungals against various fungal species, although not all clinical isolates have corresponding MIC (minimum inhibitory concentration) data available.
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Choanephora infundibulifera is a member of the Mucorales order of fungi. The species is associated with plants as a saprophyte or parasite and may be responsible for spoilage or disease but is an uncommon cause of human infection. We describe C.

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Background: Lagenidium deciduum is an oomycete that can cause infections in mammals that present similarly to pythiosis and mucormycosis. Most of the existing case reports have occurred in canines and have been fatal. In animals, medical therapy has not been successful, so surgical excision is the mainstay of treatment.

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Unlabelled: Invasive mold infections (IMIs) are associated with high morbidity, particularly in immunocompromised patients, with mortality rates between 40% and 80%. Early initiation of appropriate antifungal therapy can substantially improve outcomes, yet early diagnosis remains difficult to establish and often requires multidisciplinary teams evaluating clinical and radiological findings plus supportive mycological findings. Universal digital high-resolution melting (U-dHRM) analysis may enable rapid and robust diagnoses of IMI.

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Article Synopsis
  • Fungal infections are becoming more common because more people are at risk and climate change is affecting health.
  • There are only a few types of antifungal medicines available, and they have problems like resistance from fungi and side effects that need close monitoring.
  • Scientists are exploring new antifungal options, including inhaled treatments and ways to boost the immune system, to better fight these infections and understand issues like drug resistance.
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Ibrexafungerp (formerly SCY-078) is the first member of the triterpenoid class that prevents the synthesis of the fungal cell wall polymer β-(1,3)-D-glucan by inhibiting the enzyme glucan synthase. We evaluated the efficacy of ibrexafungerp against pulmonary mucormycosis using an established murine model. Neutropenic mice were intratracheally infected with either or .

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Key Clinical Message: We report on a dog with immune-mediated hemolytic anemia (IMHA) treated with immunomodulatory therapy that developed phaeohyphomycosis and infections. This is the first reported case of in dogs. It details cytological and microbiological findings leading to diagnosis and highlights the importance of investigating new lesions in immunocompromised patients.

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Coccidioidomycosis is caused by () and (), which have a 4-5% difference in their genomic sequences. There is an urgent need to develop a human vaccine against both species. A previously created recombinant antigen (rCpa1) that contains multiple peptides derived from isolate C735 is protective against the autologous isolate.

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Background: Invasive mold infections (IMIs) such as aspergillosis, mucormycosis, fusariosis, and lomentosporiosis are associated with high morbidity and mortality, particularly in immunocompromised patients, with mortality rates as high as 40% to 80%. Outcomes could be substantially improved with early initiation of appropriate antifungal therapy, yet early diagnosis remains difficult to establish and often requires multidisciplinary teams evaluating clinical and radiological findings plus supportive mycological findings. Universal digital high resolution melting analysis (U-dHRM) may enable rapid and robust diagnosis of IMI.

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Article Synopsis
  • Previous attempts at creating safer antifungal treatments were based on an outdated model, focusing on how they damage fungal cell membranes.
  • Researchers discovered that the key to the antifungal action of amphotericin B, a potent but kidney-damaging drug, lies in its ability to form sponge-like aggregates that extract crucial components from fungi.
  • By modifying amphotericin B to selectively extract ergosterol without harming human kidneys, scientists developed a new polyene compound, AM-2-19, which shows promise as a safer and effective treatment against various fungal infections.
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  • - The frequent renaming of medically significant fungi is complicating the work of clinical labs and healthcare providers, highlighting the need for better communication and resources in this area.
  • - Different factors drive name changes at the species and genus levels, prompting the authors to suggest maintaining larger genera and providing diagnostic markers for new classifications to help simplify identification.
  • - The authors call for an open-access online database to track these changes, recommending a committee to regularly review new names so that clinicians can access consistent and validated information about fungal species.
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The clinical utility of Coccidioides species antifungal susceptibility testing (AST) remains unclear. This study describes the clinical course of eight patients with severe or chronic coccidioidomycosis and subsequent Coccidioides AST. We present the clinical manifestations, antifungal treatment regimens, and clinical outcomes for these patients.

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