Whole-Genome SNP Analysis Identifies Putative Mycobacterium bovis Transmission Clusters in Livestock and Wildlife in Catalonia, Spain
Thacker, Tyler C.
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.
619 - Veterinària
Is part of
Perea, Claudia, Giovanna Ciaravino, Tod Stuber, Tyler C. Thacker, Suelee Robbe-Austerman, Alberto Allepuz, and Bernat Pérez de Val. 2021. "Whole-Genome SNP Analysis Identifies Putative Mycobacterium Bovis Transmission Clusters In Livestock And Wildlife In Catalonia, Spain". Microorganisms 9 (8): 1629. doi:10.3390/microorganisms9081629.
Grant agreement number
MINECO/Programa Estatal de fomento de la investigación científica y técnica de excelencia/ AGL2013-49159-C2-1-R/ES/EPIDEMIOLOGIA DE LA TUBERCULOSIS BOVINA EN ANIMALES DOMESTICOS EN ESPAÑA: IMPLICACION DE RESERVORIOS DOMESTICOS Y SILVESTRES Y EVALUACION DE MEDIDAS DE LUCHA/
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- ARTICLES CIENTÍFICS 
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