With the increasing threat of epidemic resistant organisms such as Methicillin Resistant Staphylococcus aureus (MRSA) the need for appropriate antibiotic selection is currently of prime importance to both clinical and veterinary science [ 21, 22].
Phylogenetic analysis using SNP data for the core genomes found that this historic Canadian isolate also is not closely related to non-epidemic emm59 GAS organisms isolated in other geographic locations such as the United States, Japan or Spain.
In conclusion, our results suggest that we are dealing with the same LGV variant >25 years later, and the current LGV outbreak in industrialized countries has most likely been a slowly evolving epidemic with an organism that has gone unnoticed in the community for many years and is now being detected by new technologies.
This report describes the trends of nosocomial infections caused by PDRAB in a university hospital and characterizes a hospitalwide epidemic due to these organisms during a 16-month period.
In 1894, during the epidemic in Hong Kong, the organism that causes plague was isolated independently by two bacteriologists, the Frenchman Alexandre Yersin, working for the Pasteur Institute, and the Japanese Kitasato Shibasaburo, a former associate of Koch.
The epidemic potential of the organism is conferred by the production of a potent cholera toxin (CT) and an adhesion factor toxin-co-regulated pilus (TCP).
In the related organism, A. marginale, the genomic repertoire of msp2 pseudogenes has been associated with the ability, or lack of ability, of strains to superinfect and cause epidemic spread of the organism (5 ).
For example, one hypothesis suggests that V. cholerae was introduced into Haiti by infected Nepalese peacekeeping soldiers and that the epidemic spread of the organism was due to poor sanitation (Ceccarelli 2011; Frerichs 2012).
By sequencing the genomes of 601 epidemic, historic, and other emm59 organisms, we discovered that a recently emerged, genetically distinct emm59 clone is responsible for the Canadian epidemic.
Our integrated data analysis strategy permits prompt and accurate mapping of the dissemination of bacterial organisms in an epidemic wave, permitting rapid generation of hypotheses that inform public health and virulence studies.
