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South African Scientists Crack Code of Drug-resistant TB
They hope the information will contribute to developing better diagnostics and treatments for the disease.
The bacteria analysed were taken from a patient in Durban's King Edward VIII Hospital in KwaZulu Natal, science site SciDev.Net reported.
Scientists from the Nelson R. Mandela School of Medicine at the University of KwaZulu Natal, and the National Genomics Platform sequenced the genome 20 times to distinguish mutations from sequencing errors and provide a reference for further sequencing projects of XDR and multi-drug resistant TB.
James Sakwa, manager of the National Genomics Platform, told SciDev.Net that the next step would be to develop a diagnostic kit that can quickly and efficiently diagnose this strain of XDR-TB. Currently, diagnosis can take up to a month, he said.
In a statement read by medical school spokesperson Mary Ann Francis, Willem Sturm, dean of the School of Medicine and head of the research team, said the sequencing of the genome was "a major breakthrough".
"The successful sequencing has, in a short space of time, led to a focus on drug and vaccine development which will enable clinicians to treat the disease," Sturm added.
Sakwa says the breakthrough was achieved by using "pyro-sequencing" technology, where massive amounts of information are produced in parallel.
"This enabled us to sequence the whole genome within a week," he said. If the scientists had used older technologies, it would have taken about a year to achieve the same result.
Proposals for the sequencing of other TB strains are currently being considered by the National Genomics Platform. "The truth is we don't know how many mutations of XDR-TB there are," Sakwa said.
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