Publications by authors named "Jossue Ortiz-Alvarez"

Introduction: Myroides is a bacterial genus of opportunistic bacteria responsible for diverse infections including in the skin and soft tissues, urinary tract, cardiovascular system, and bacteremia, although the incidence of its reported infections is low, it is increasing, likely due the use of better bacterial identification methods, but also perhaps due an increase in its prevalence. In addition, their pathogenic role is limited in terms of reporting their microbial physiology, so the present work provides information in this regard in addition to the information that is available in the international literature.

Objective: To describe the microbiological and genetic characteristics of seven different Myroides spp.

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is a native perennial plant used in traditional Mexican medicine. In June 2022, leaf blight symptoms were observed in a wild population of plants. Disease incidence was 80% and disease intensity reached up to 5% of the leaf area.

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Acinetobacter baumannii belongs to the ESKAPE group. It is classified as a critical priority group by the World Health Organization and a global concern on account of its capacity to acquire and develop resistance mechanisms to multiple antibiotics. Data from the United States indicates 500 deaths annually.

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Background: Infections caused by Stenotrophomonas maltophilia and related species are increasing worldwide. Unfortunately, treatment options are limited, whereas the antimicrobial resistance is increasing.

Methods: We included clinical isolates identified as S.

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The genomes of species belonging to the genus Colletotrichum harbor a substantial number of cytochrome P450 monooxygenases (CYPs) encoded by a broad diversity of gene families. However, the biological role of their CYP complement (CYPome) has not been elucidated. Here, we investigated the putative evolutionary scenarios that occurred during the evolution of the CYPome belonging to the Colletotrichum Graminicola species complex (s.

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The increasing number of infections caused by antimicrobial multi-resistant microorganisms has led to the search for new microorganisms capable of producing novel antibiotics. This work proposes sp. nov.

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Article Synopsis
  • * Researchers isolated various Bacillus strains from mine tailings in Zacatecas, Mexico, which can tolerate heavy metals and enhance soil quality by producing beneficial compounds like siderophores and IAA, and by solubilizing phosphates.
  • * The adaptations found in these Bacillus species, including specific genes for nutrient fixation and toxicity resistance, suggest they play a crucial role in helping ecosystems recover from mining impacts and could aid in phytoremediation efforts.
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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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Due to the emergence of multidrug-resistant strains of yeasts belonging to the Candida genus, there is an urgent need to discover antifungal agents directed at alternative molecular targets. The aim of the current study was to evaluate the capacity of three different series of synthetic compounds to inhibit the Candida glabrata enzyme denominated 3-hydroxy-methyl-glutaryl-CoA reductase and thus affect ergosterol synthesis and yeast viability. Compounds 1c (α-asarone-related) and 5b (with a pyrrolic core) were selected as the best antifungal candidates among over 20 synthetic compounds studied.

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Cytochrome P450s from the CYP52 family participate in the assimilation of alkanes and fatty acids in fungi. In this work, the evolutionary history of a set of orthologous and paralogous CYP52 proteins from Saccharomycetales yeasts was inferred. Further, the phenotypic assimilation profiles were related with the distribution of cytochrome CYP52 members among species.

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Article Synopsis
  • 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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The aim of this study was to examine four strains of two yeast species in relation to their capability for assimilating alkanes in the presence of heavy metals (HMs). The four strains tested were Candida pseudoglaebosa ENCB-7 and Kodamaea ohmeri ENCB-8R, ENCB-23, and ENCB-VIK. Determination was made of the expression of CYP52 genes involved in alkane hydroxylation.

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The aim of this study was to examine four strains of two yeast species in relation to their capability for assimilating alkanes in the presence of heavy metals (HMs). The four strains tested were Candida pseudoglaebosa ENCB-7 and Kodamaea ohmeri ENCB-8R, ENCB-23, and ENCB-VIK. Determination was made of the expression of CYP52 genes involved in alkane hydroxylation.

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Due to increasing resistance of Candida species to antifungal drugs, especially azoles, new drugs are needed. The proposed compounds 3 and 4 are analogous to α-asarone (2), a naturally occurring potent inhibitor of HMGR with hypolipidemic and antifungal activity. We used the recombinant enzyme 3-hydroxy-3-methylglutaryl coenzyme A reductase of Candida glabrata (CgHMGR) as a model to test the effectiveness of the test compounds.

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