{"title":"哥伦比亚耐药金黄色念珠菌分离株的基因组流行病学研究。","authors":"Maira Lyseth Alvarado Casas, Jeisson Alejandro Triana Díaz, Efrain Montilla-Escudero, Diego Andrés Prada Cardozo, Patricia Escandón Hernández","doi":"10.1128/aac.00725-25","DOIUrl":null,"url":null,"abstract":"<p><p>Since 2016, <i>Candida auris</i> has been subject to mandatory reporting in Colombia due to its critical public health implications. In this context, a genomic characterization of clinical <i>C. auris</i> isolates collected between 2018 and 2024 through national surveillance led by the Instituto Nacional de Salud (INS) was conducted. Twenty-seven isolates from hospitalized patients across 14 departments were analyzed using next-generation sequencing (NGS) and bioinformatics tools (MycoSNP-nf v1.5, TheiaEuk BLAST, Python script, and MUSCLE, snp_phylogeny) to identify mutations associated with antifungal resistance. The patient group was predominantly male <i>n</i> = 18 (66.7%), with 48% (<i>n</i> = 13) for the older adult age group (>60 years of age). Antifungal susceptibility testing (anidulafungin, fluconazole, and amphotericin B) revealed that five isolates (18.5%) were resistant to a single antifungal, while 22 (81.5%) were resistant to two. All isolates belonged to clade IV (South America) and exhibited genetic divergence ranging from 5 to 127 single-nucleotide polymorphisms (SNPs). Mutations in the <i>ERG11</i> gene were identified in 16 isolates, including Y132F (<i>n</i> = 11), G459S (<i>n</i> = 1), K143R (<i>n</i> = 2), and F444L (<i>n</i> = 1), along with a novel mutation, G445D (<i>n</i> = 1). Four of these 16 isolates also harbored mutations in the <i>TAC1B</i> gene (P595H, <i>n</i> = 3; S611P, <i>n</i> = 1), and one isolate carried a single <i>TAC1B</i> mutation (S195G). Additionally, three isolates presented the S639F mutation in the <i>FKS1</i> gene. Notably, seven isolates showed phenotypic resistance without any known resistance mutations. These findings are concerning, as the antifungals involved are critical for treating invasive <i>Candida</i> infections. The study highlights the need for ongoing genomic surveillance to complement phenotypic testing and enhance strategies for antifungal resistance control, ultimately informing therapeutic decision-making and drug development.</p>","PeriodicalId":8152,"journal":{"name":"Antimicrobial Agents and Chemotherapy","volume":" ","pages":"e0072525"},"PeriodicalIF":4.5000,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Genomic epidemiology of Colombian resistant <i>Candida auris</i> isolates.\",\"authors\":\"Maira Lyseth Alvarado Casas, Jeisson Alejandro Triana Díaz, Efrain Montilla-Escudero, Diego Andrés Prada Cardozo, Patricia Escandón Hernández\",\"doi\":\"10.1128/aac.00725-25\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Since 2016, <i>Candida auris</i> has been subject to mandatory reporting in Colombia due to its critical public health implications. In this context, a genomic characterization of clinical <i>C. auris</i> isolates collected between 2018 and 2024 through national surveillance led by the Instituto Nacional de Salud (INS) was conducted. Twenty-seven isolates from hospitalized patients across 14 departments were analyzed using next-generation sequencing (NGS) and bioinformatics tools (MycoSNP-nf v1.5, TheiaEuk BLAST, Python script, and MUSCLE, snp_phylogeny) to identify mutations associated with antifungal resistance. The patient group was predominantly male <i>n</i> = 18 (66.7%), with 48% (<i>n</i> = 13) for the older adult age group (>60 years of age). Antifungal susceptibility testing (anidulafungin, fluconazole, and amphotericin B) revealed that five isolates (18.5%) were resistant to a single antifungal, while 22 (81.5%) were resistant to two. All isolates belonged to clade IV (South America) and exhibited genetic divergence ranging from 5 to 127 single-nucleotide polymorphisms (SNPs). Mutations in the <i>ERG11</i> gene were identified in 16 isolates, including Y132F (<i>n</i> = 11), G459S (<i>n</i> = 1), K143R (<i>n</i> = 2), and F444L (<i>n</i> = 1), along with a novel mutation, G445D (<i>n</i> = 1). Four of these 16 isolates also harbored mutations in the <i>TAC1B</i> gene (P595H, <i>n</i> = 3; S611P, <i>n</i> = 1), and one isolate carried a single <i>TAC1B</i> mutation (S195G). Additionally, three isolates presented the S639F mutation in the <i>FKS1</i> gene. Notably, seven isolates showed phenotypic resistance without any known resistance mutations. These findings are concerning, as the antifungals involved are critical for treating invasive <i>Candida</i> infections. The study highlights the need for ongoing genomic surveillance to complement phenotypic testing and enhance strategies for antifungal resistance control, ultimately informing therapeutic decision-making and drug development.</p>\",\"PeriodicalId\":8152,\"journal\":{\"name\":\"Antimicrobial Agents and Chemotherapy\",\"volume\":\" \",\"pages\":\"e0072525\"},\"PeriodicalIF\":4.5000,\"publicationDate\":\"2025-10-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Antimicrobial Agents and Chemotherapy\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1128/aac.00725-25\",\"RegionNum\":2,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MICROBIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Antimicrobial Agents and Chemotherapy","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1128/aac.00725-25","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MICROBIOLOGY","Score":null,"Total":0}
Genomic epidemiology of Colombian resistant Candida auris isolates.
Since 2016, Candida auris has been subject to mandatory reporting in Colombia due to its critical public health implications. In this context, a genomic characterization of clinical C. auris isolates collected between 2018 and 2024 through national surveillance led by the Instituto Nacional de Salud (INS) was conducted. Twenty-seven isolates from hospitalized patients across 14 departments were analyzed using next-generation sequencing (NGS) and bioinformatics tools (MycoSNP-nf v1.5, TheiaEuk BLAST, Python script, and MUSCLE, snp_phylogeny) to identify mutations associated with antifungal resistance. The patient group was predominantly male n = 18 (66.7%), with 48% (n = 13) for the older adult age group (>60 years of age). Antifungal susceptibility testing (anidulafungin, fluconazole, and amphotericin B) revealed that five isolates (18.5%) were resistant to a single antifungal, while 22 (81.5%) were resistant to two. All isolates belonged to clade IV (South America) and exhibited genetic divergence ranging from 5 to 127 single-nucleotide polymorphisms (SNPs). Mutations in the ERG11 gene were identified in 16 isolates, including Y132F (n = 11), G459S (n = 1), K143R (n = 2), and F444L (n = 1), along with a novel mutation, G445D (n = 1). Four of these 16 isolates also harbored mutations in the TAC1B gene (P595H, n = 3; S611P, n = 1), and one isolate carried a single TAC1B mutation (S195G). Additionally, three isolates presented the S639F mutation in the FKS1 gene. Notably, seven isolates showed phenotypic resistance without any known resistance mutations. These findings are concerning, as the antifungals involved are critical for treating invasive Candida infections. The study highlights the need for ongoing genomic surveillance to complement phenotypic testing and enhance strategies for antifungal resistance control, ultimately informing therapeutic decision-making and drug development.
期刊介绍:
Antimicrobial Agents and Chemotherapy (AAC) features interdisciplinary studies that build our understanding of the underlying mechanisms and therapeutic applications of antimicrobial and antiparasitic agents and chemotherapy.