Molecular typing of bacterial isolates provides a powerful approach for distinguishing genotypes. It is known that strain virulence plays a role in prevalence and spread of the disease, suggesting that strain virulence and prevailing genotypes are associated. However, it is not well understood whether strain virulence correlates with particular genotypes.
View Article and Find Full Text PDFThe molecular fingerprints of 878 isolates of Mycobacterium bovis collected from cattle between 2009 and 2010 in different regions of Mexico were used in this study. One hundred and ninety-four spoligotypes were observed in total with a high degree of heterogeneity. Sixty-four percent of the isolates grouped into just nine spoligotypes, and 27% fell into only two spoligotypes: SB0673 and SB0669; 149 were orphan spoligotypes.
View Article and Find Full Text PDFObjective: The purpose of the study was to determine the role of bovine TB in cases of human TB.
Material And Methods: Two-hundred and fifty-five samples from symptomatic patients were included in the study. All samples were cultured in Stonebrink and Lowënstein-Jensen media and analyzed using a nested PCRMPB70.
Tuberculosis (TB) represents a barrier for free trade of livestock between Mexico and the United States of America (US). In spite of efforts from Mexico to export TB-free animals, some of those found with TB lesions in slaughterhouses in the US are traced back to that country. Therefore, the purpose of this study was to determine, through molecular epidemiology, the most probable source of infection for cattle found with TB lesions in the US.
View Article and Find Full Text PDFPolymorphism of the PE domain of PE/PE_PGRS sequences was studied in Mycobacterium bovis isolates from different Mexican states. Samples were analyzed by spolygotyping and RFLP using IS6110 and a 235-bp fragment of the PE domain of PE/PE_PGRS as probes. With the PE probe, three different genotypes were observed, one being predominant in all states.
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