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Title: Whole-Genome SNP Analysis Identifies Putative Mycobacterium bovis Transmission Clusters in Livestock and Wildlife in Catalonia, Spain

Journal Article · · Microorganisms
ORCiD logo [1]; ; ORCiD logo [2];  [2]; ORCiD logo [2];  [3]; ORCiD logo [4]
  1. US Dept. of Agriculture (USDA), Ames, IA (United States). National Veterinary Services Laboratories; OSTI
  2. US Dept. of Agriculture (USDA), Ames, IA (United States). National Veterinary Services Laboratories
  3. Univ. Autonoma de Barcelona (Spain); Centre de Recerca en Sanitat Animal (CReSA), Bellaterra (Spain); OIE Collaborating Centre for the Research and Control of Emerging and Re-Emerging Swine Diseases in Europe, Bellaterra (Spain)
  4. Centre de Recerca en Sanitat Animal (CReSA), Bellaterra (Spain); OIE Collaborating Centre for the Research and Control of Emerging and Re-Emerging Swine Diseases in Europe, Bellaterra (Spain)

The high-resolution WGS analyses of MTBC strains have provided useful insight for determining sources of infection for animal tuberculosis. In Spain, tuberculosis in livestock is caused by Mycobacterium bovis and Mycobacterium caprae, where wildlife reservoirs play an important role. We analyzed a set of 125 M. bovis isolates obtained from livestock and wildlife from Catalonia to investigate strain diversity and identify possible sources and/or causes of infection. Whole-genome SNP profiles were used for phylogenetic reconstruction and pairwise SNP distance analysis. Additionally, SNPs were investigated to identify virulence and antimicrobial resistance factors to investigate clade-specific associations. Putative transmission clusters (≤12 SNPs) were identified, and associated epidemiological metadata were used to determine possible explanatory factors for transmission. M. bovis distribution was heterogeneous, with 7 major clades and 21 putative transmission clusters. In order of importance, the explanatory factors associated were proximity and neighborhood, residual infection, livestock-wildlife interaction, shared pasture, and movement. Genes related to lipid transport and metabolism showed the highest number of SNPs. All isolates were pyrazinamide resistant, and five were additionally resistant to isoniazid, but no clade-specific associations could be determined. Our findings highlight the importance of high-resolution molecular surveillance to monitor bovine tuberculosis dynamics in a low-prevalence setting.

Research Organization:
Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States)
Sponsoring Organization:
Ministerio de Ciencia e Innovación; USDOE Office of Science (SC)
Grant/Contract Number:
SC0014664
OSTI ID:
1904918
Journal Information:
Microorganisms, Journal Name: Microorganisms Journal Issue: 8 Vol. 9; ISSN 2076-2607; ISSN MICRKN
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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