Toronto: DNA sequencing can reconstruct the spread of killer diseases from person to person, besides quickly identifying the origin and movement of pathogens.A team from the British Columbia Centre for Disease Control in Vancouver, Canada, used whole-genome sequencing to analyse the bacterial DNA in samples from 36 of 41 infected individuals in a tuberculosis (TB) outbreak.They were able to track the pathogen`s movements through the community in British Columbia, including where it started and who infected whom.From this, they could identify key persons, places, and behaviours that contributed to the spread of the disease.They showed how the social structure of a community contributed to the rapid spread of TB and that a rise in crack cocaine use in the area may have triggered the outbreak, according to a British Columbia Centre statement.
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