Publications by authors named "Jesus Resendiz-Sanchez"

Fusarium species represent an opportunistic fungal pathogen. The data in Mexico about Fusarium infections in humans are scarce. Here, we present a retrospective series of patients with a confirmed diagnosis of fusariosis in eight different hospitals in Mexico from January 2010 to December 2019.

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  • Invasive infections from filamentous fungi, particularly Aspergillus terreus, have risen due to weakened immune responses, and this fungus shows resistance to common treatments like amphotericin B, leading to higher mortality rates.
  • The study identifies a clinical strain of A. terreus and examines its ability to form biofilms using advanced microbiological techniques, revealing important stages of biofilm development through SEM-HR (Scanning Electron Microscopy in High Resolution).
  • Additionally, the research characterizes the biofilm's structure and chemical composition, identifying key components like proteins, carbohydrates, nucleic acids, and notably, lipid components, marking the first report of lipid-type biofilms in this fungal species.
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Magnusiomyces capitatus (also denominated “Geotrichum capitatum” and “the teleomorph stage of Saprochaete capitata”) mainly affects immunocompromised patients with hematological malignancies in rare cases of invasive fungal infections (IFIs). Few cases have been reported for pediatric patients with acute lymphoblastic leukemia (ALL), in part because conventional diagnostic methods do not consistently detect M. capitatus in infections.

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The CSP (cell surface protein) microsatellite marker is useful for typing isolates and determining relationships at the subpopulation level because it has shown high discriminatory power. In the present study, 90 isolates from Mexico (MX), Argentina (AR), France (FR), and Peru (PE) were identified through a phylogenetic analysis using the gene fragment and were typed with the CSP microsatellite, and the types were identified using the nomenclature recommended in the literature. Genetic variability was analyzed through haplotype diversity, nucleotide diversity, polymorphic sites, and nucleotide differences between pairs of sequences.

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  • Candida haemulonii is a multi-resistant yeast that can be misidentified, making timely DNA-based identification and antifungal susceptibility testing crucial for effective treatment.
  • A case involving a pediatric patient in Mexico City showed that caspofungin effectively treated a bloodstream infection caused by this yeast after accurate identification through molecular techniques.
  • The study emphasizes the importance of quickly identifying C. haemulonii as a significant opportunistic pathogen related to C. auris, which can enhance understanding of its epidemiology and improve patient outcomes.
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Background: Mucormycosis is a fungal infection caused by species of the Mucorales order. These microorganisms are angioinvasive, with rapid disease progression and potentially lethal in its rhinocerebral form.

Case Report: We present the case of a 12-year-old female with trisomy 21, acute lymphoblastic leukemia and diabetes, with fever and neutropenia who developed rhinocerebral mucormicosis.

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Background: Patients receiving allogeneic hematopoietic stem cell transplantation (alloHSCT) are at high risk of invasive fungal infections (IFIs), which are associated with high mortality and economic burden. The cost-effectiveness of prophylaxis for the prevention of IFIs in alloHSCT recipients in Mexico has not yet been assessed.

Methods: This analysis modeled a hypothetical cohort of 1,000 patients to estimate costs and outcomes for patients receiving prophylaxis for IFIs following alloHSCT, from the perspective of institutional payers in Mexico.

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Metabolic control improves outcomes associated with mucormycosis. The aim of this study was to compare the in vitro proliferation of Rhizopus oryzae in blood of individuals with and without diabetes at different glycaemic levels. Ninety-five individuals were included.

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A case of disseminated infection caused by Penicillium chrysogenum in a 10-year-old boy with a history of Henoch-Schönlein purpura and proliferative glomerulonephritis, treated with immunosuppressors, is reported herein. The patient had a clinical picture of 2 weeks of fever that did not respond to treatment with broad-spectrum antibiotics and amphotericin B. Computed tomography imaging showed diffuse cotton-like infiltrates in the lungs, hepatomegaly, mesenteric lymphadenopathy, and multiple well-defined round hypodense lesions in the spleen.

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  • A 3-year-old girl was diagnosed with a rare foot abscess caused by the bacterium Brucella melitensis, despite initial tests showing no microorganisms present.
  • After culturing the material from the abscess for seven days, small colonies of Gram-negative cocobacilli were identified.
  • The case highlights the need to consider Brucella as a potential cause of foot abscesses in regions where brucellosis is common.
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Mucormycosis (zygomycosis) normally occurs among individuals with predisposing factors such as prematurity, use of broad spectrum antibiotics, metabolic acidosis or advanced stages of immunosuppression. There have been reports of sporadic cases of cutaneous mucormycosis related to predisposing skin lesions and contact with contaminated material such as adhesive bandages and tongue depressors placed close to intravenous catheter insertion sites. We report successful treatment of a case of Absidia corymbifera infection with the combination of amphotericin B and surgical debridement of the affected area.

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