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News tips from the journal mBio®, volume 4, issue 1
Date:3/14/2013

he outbreak were very closely related, suggesting that a single introduction became established in Mahajanga and then underwent local cycling and differential. The ultimate extinction of plague in Mahajanga suggests that although plague pathogens' ability to invade port cities has been essential for intercontinental spread, these regions are not a suitable long-term niche. However, the temporary large pathogen population expansion provides the means for plague pathogens to disperse and become ecologically established in more suitable nonurban environments.

http://bit.ly/mbiotip0313b


Gene Library for Staph

To enhance the research capabilities of investigators interested in Staphylococcus aureus, the Nebraska Center for Staphylococcal Research (CSR) has generated a sequence-defined transposon mutant library consisting of 1,952 strains, each containing a single mutation within a nonessential gene of the epidemic community-associated methicillin-resistant S. aureus (CA-MRSA) isolate USA300. Infections caused by S. aureus cause significant morbidity and mortality in both community and hospital environments. Specific-allelic-replacement mutants are required to study the biology of this organism; however, this process is costly and time-consuming. In this paper the researchers describe the construction and validation of a sequence-defined transposon mutant library available for use by the scientific community through the Network on Antimicrobial Resistance in Staphylococcus aureus (NARSA) strain repository. Overall, this library and associated tools will have a significant impact on studies investigating S. aureus pathogenesis and biology and serve as a useful paradigm for the study of other bacterial systems.

http://bit.ly/mbiotip0313c


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Contact: Jim Sliwa
jsliwa@asmusa.org
202-942-9297
American Society for Microbiology
Source:Eurekalert

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