Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Drug-resistant MRSA bacteria — here to stay in both hospital and community (PLoS Pathogens)

18.03.2013
The drug-resistant bac­te­ria known as MRSA, once con­fined to hos­pi­tals but now wide­spread in com­mu­ni­ties, will likely con­tinue to exist in both set­tings as sep­a­rate strains, accord­ing to a new study.
The pre­dic­tion that both strains will coex­ist is reas­sur­ing because pre­vi­ous pro­jec­tions indi­cated that the more inva­sive and fast-growing com­mu­nity strains would over­take and elim­i­nate hos­pi­tal strains, pos­si­bly pos­ing a threat to pub­lic health.

Researchers at Prince­ton Uni­ver­sity used math­e­mat­i­cal mod­els to explore what will hap­pen to com­mu­nity and hos­pi­tal MRSA strains, which dif­fer genet­i­cally. Orig­i­nally MRSA, which is short for methicillin-resistant Staphy­lo­coc­cus aureus, was con­fined to hos­pi­tals. How­ever, community-associated strains emerged in the past decade and can spread widely from per­son to per­son in schools, ath­letic facil­i­ties and homes.

Both com­mu­nity and hos­pi­tal strains cause dis­eases rang­ing from skin and soft-tissue infec­tions to pneu­mo­nia and sep­ticemia. Hos­pi­tal MRSA is resis­tant to numer­ous antibi­otics and is very dif­fi­cult to treat, while com­mu­nity MRSA is resis­tant to fewer antibiotics.

The new study found that these dif­fer­ences in antibi­otic resis­tance, com­bined with more aggres­sive antibi­otic usage pat­terns in hos­pi­tals ver­sus the com­mu­nity set­ting, over time will per­mit hos­pi­tal strains to sur­vive despite the com­pe­ti­tion from com­mu­nity strains. Hospital-based antibi­otic usage is likely to suc­cess­fully treat patients infected with com­mu­nity strains, pre­vent­ing the new­comer strains from spread­ing to new patients and gain­ing the foothold they need to out-compete the hos­pi­tal strains.

The researchers made their pre­dic­tions by using math­e­mat­i­cal mod­els of MRSA trans­mis­sion that take into account data on drug-usage, resis­tance pro­files, person-to-person con­tact, and patient age.

Pub­lished Feb­ru­ary 28 in the jour­nal PLOS Pathogens, the study was con­ducted by post­doc­toral researcher Roger Kouyos, now a scholar at the Uni­ver­sity of Zurich, and Eili Klein, a grad­u­ate stu­dent who is now an assis­tant pro­fes­sor in the Johns Hop­kins School of Med­i­cine. They con­ducted the work under the advise­ment of Bryan Gren­fell, Princeton’s Kathryn Briger and Sarah Fen­ton Pro­fes­sor of Ecol­ogy and Evo­lu­tion­ary Biol­ogy and Pub­lic Affairs at Princeton’s Woodrow Wil­son School of Inter­na­tional and Pub­lic Affairs.

Read the arti­cle (open access).

Kouyos R., Klein E. & Gren­fell B. (2013). Hospital-Community Inter­ac­tions Fos­ter Coex­is­tence between Methicillin-Resistant Strains of Staphy­lo­coc­cus aureus. PLoS Pathogens, 9 (2) e1003134. PMID: 23468619

RK was sup­ported by the Swiss National Sci­ence Foun­da­tion (Grants PA00P3_131498 and PZ00P3_142411). EK was sup­ported by Prince­ton Uni­ver­sity (Harold W. Dodds Fel­low­ship), as well as the Mod­els of Infec­tious Dis­ease Agent Study (MIDAS), under Award Num­ber U01GM070708 from the National Insti­tute of Gen­eral Med­ical Sci­ences. BG was sup­ported by the Bill and Melinda Gates Foun­da­tion; the Research and Pol­icy for Infec­tious Dis­ease Dynam­ics (RAPIDD) pro­gram of the Sci­ence and Tech­nol­ogy Direc­torate, Depart­ment of Home­land Secu­rity; and the Fog­a­rty Inter­na­tional Cen­ter, National Insti­tutes of Health.

Catherine Zandonella | EurekAlert!
Further information:
http://www.princeton.edu

More articles from Health and Medicine:

nachricht Potential seen for tailoring treatment for acute myeloid leukemia
10.12.2018 | University of Washington Health Sciences/UW Medicine

nachricht UC San Diego researchers develop sensors to detect and measure cancer's ability to spread
06.12.2018 | University of California - San Diego

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Researchers develop method to transfer entire 2D circuits to any smooth surface

What if a sensor sensing a thing could be part of the thing itself? Rice University engineers believe they have a two-dimensional solution to do just that.

Rice engineers led by materials scientists Pulickel Ajayan and Jun Lou have developed a method to make atom-flat sensors that seamlessly integrate with devices...

Im Focus: Three components on one chip

Scientists at the University of Stuttgart and the Karlsruhe Institute of Technology (KIT) succeed in important further development on the way to quantum Computers.

Quantum computers one day should be able to solve certain computing problems much faster than a classical computer. One of the most promising approaches is...

Im Focus: Substitute for rare earth metal oxides

New Project SNAPSTER: Novel luminescent materials by encapsulating phosphorescent metal clusters with organic liquid crystals

Nowadays energy conversion in lighting and optoelectronic devices requires the use of rare earth oxides.

Im Focus: A bit of a stretch... material that thickens as it's pulled

Scientists have discovered the first synthetic material that becomes thicker - at the molecular level - as it is stretched.

Researchers led by Dr Devesh Mistry from the University of Leeds discovered a new non-porous material that has unique and inherent "auxetic" stretching...

Im Focus: The force of the vacuum

Scientists from the Theory Department of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science (CFEL) in Hamburg have shown through theoretical calculations and computer simulations that the force between electrons and lattice distortions in an atomically thin two-dimensional superconductor can be controlled with virtual photons. This could aid the development of new superconductors for energy-saving devices and many other technical applications.

The vacuum is not empty. It may sound like magic to laypeople but it has occupied physicists since the birth of quantum mechanics.

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

New Plastics Economy Investor Forum - Meeting Point for Innovations

10.12.2018 | Event News

EGU 2019 meeting: Media registration now open

06.12.2018 | Event News

Expert Panel on the Future of HPC in Engineering

03.12.2018 | Event News

 
Latest News

Small but ver­sat­ile; key play­ers in the mar­ine ni­tro­gen cycle can util­ize cy­anate and urea

10.12.2018 | Life Sciences

New method gives microscope a boost in resolution

10.12.2018 | Physics and Astronomy

Carnegie Mellon researchers probe hydrogen bonds using new technique

10.12.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>