1
|
Comín J, Madacki J, Rabanaque I, Zúñiga-Antón M, Ibarz D, Cebollada A, Viñuelas J, Torres L, Sahagún J, Klopp C, Gonzalo-Asensio J, Brosch R, Iglesias MJ, Samper S. The MtZ Strain: Molecular Characteristics and Outbreak Investigation of the Most Successful Mycobacterium tuberculosis Strain in Aragon Using Whole-Genome Sequencing. Front Cell Infect Microbiol 2022; 12:887134. [PMID: 35685752 PMCID: PMC9173592 DOI: 10.3389/fcimb.2022.887134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 04/11/2022] [Indexed: 11/13/2022] Open
Abstract
Since 2004, a tuberculosis surveillance protocol has been carried out in Aragon, thereby managing to detect all tuberculosis outbreaks that take place in the community. The largest outbreak was caused by a strain named Mycobacterium tuberculosis Zaragoza (MtZ), causing 242 cases as of 2020. The main objective of this work was to analyze this outbreak and the molecular characteristics of this successful strain that could be related to its greater transmission. To do this, we first applied whole-genome sequencing to 57 of the isolates. This revealed two principal transmission clusters and six subclusters arising from them. The MtZ strain belongs to L4.8 and had eight specific single nucleotide polymorphisms (SNPs) in genes considered to be virulence factors [ptpA, mc3D, mc3F, VapB41, pks15 (two SNPs), virS, and VapC50]. Second, a transcriptomic study was carried out to better understand the multiple IS6110 copies present in its genome. This allowed us to observe three effects of IS6110: the disruption of the gene in which the IS6110 is inserted (desA3), the overexpression of a gene (ppe38), and the absence of transcription of genes (cut1:Rv1765c) due to the recombination of two IS6110 copies. Finally, because of the disruption of ppe38 and ppe71 genes by an IS6110, a study of PE_PGRS secretion was carried out, showing that MtZ secretes these factors in higher amounts than the reference strain, thereby differing from the hypervirulent phenotype described for the Beijing strains. In conclusion, MtZ consists of several SNPs in genes related to virulence, pathogenesis, and survival, as well as other genomic polymorphisms, which may be implicated in its success among our population.
Collapse
Affiliation(s)
- Jessica Comín
- Grupo de Genética de Micobacterias, Instituto Aragonés de Ciencias de la Salud, Zaragoza, Spain
| | - Jan Madacki
- Unit for Integrated Mycobacterial Pathogenomics, Institut Pasteur, Université de Paris, CNRS UMR 3525, Paris, France
| | - Isabel Rabanaque
- Departamento de Geografía y Ordenación del Territorio, Universidad de Zaragoza, Zaragoza, Spain.,Instituto Universitario de Investigación en Ciencias Ambientales de Aragón, Zaragoza, Spain.,Fundación Instituto de Investigación Sanitaria (IIS) Aragón, Zaragoza, Spain
| | - María Zúñiga-Antón
- Departamento de Geografía y Ordenación del Territorio, Universidad de Zaragoza, Zaragoza, Spain.,Instituto Universitario de Investigación en Ciencias Ambientales de Aragón, Zaragoza, Spain.,Fundación Instituto de Investigación Sanitaria (IIS) Aragón, Zaragoza, Spain
| | - Daniel Ibarz
- Grupo de Genética de Micobacterias, Facultad de Medicina, Universidad de Zaragoza, Zaragoza, Spain
| | - Alberto Cebollada
- Unidad de Biocomputación, Instituto Aragonés de Ciencias de la Salud, Zaragoza, Spain
| | - Jesús Viñuelas
- Hospital Universitario Miguel Servet, Zaragoza, Spain.,Grupo de Estudio de Infecciones por Micobacterias (GEIM), Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica, Madrid, Spain
| | | | - Juan Sahagún
- Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain
| | | | - Jesús Gonzalo-Asensio
- Grupo de Genética de Micobacterias, Facultad de Medicina, Universidad de Zaragoza, Zaragoza, Spain
| | - Roland Brosch
- Unit for Integrated Mycobacterial Pathogenomics, Institut Pasteur, Université de Paris, CNRS UMR 3525, Paris, France
| | - María-José Iglesias
- Fundación Instituto de Investigación Sanitaria (IIS) Aragón, Zaragoza, Spain.,Grupo de Genética de Micobacterias, Facultad de Medicina, Universidad de Zaragoza, Zaragoza, Spain.,Centro de Investigación Biomédica en Red (CIBER) de Enfermedades Respiratorias, Madrid, Spain
| | - Sofía Samper
- Grupo de Genética de Micobacterias, Instituto Aragonés de Ciencias de la Salud, Zaragoza, Spain.,Fundación Instituto de Investigación Sanitaria (IIS) Aragón, Zaragoza, Spain.,Centro de Investigación Biomédica en Red (CIBER) de Enfermedades Respiratorias, Madrid, Spain
| |
Collapse
|