Navigation Links
NIH-supported scientists investigate a newly emerging staph strain
Date:2/28/2012

Using genome sequencing and household surveillance, National Institutes of Health (NIH) scientists and their colleagues from Columbia University Medical Center and St. George's University of London have pieced together how a newly emerging type of Staphylococcus aureus bacteria has adapted to transmit more easily among humans. Their new study underscores the need for vigilance in surveillance of S. aureus.

A methicillin-resistant S. aureus (MRSA) strain known as livestock-associated (LA)-ST398 is a cause of severe infections in people in Europe who have close contact with swine, but the bacterium does not transmit well from person to person. More recently, a variant of LA-ST398 that presently is susceptible to methicillin has emerged as a significant cause of community-associated infections in several countries, including the United States, Canada and China. The new strain primarily infects the skin and soft tissue, but it can cause more severe disease.

Based on samples from 332 households in northern Manhattan, New York, scientists have determined that this new strain, named ST398-NM, efficiently transmits from person to personin contrast to the transmission characteristics of the livestock-associated strain.

By analyzing and comparing the genomes of LA-ST398 and ST398-NM, the study, led by Anne-Catrin Uhlemann, M.D., Ph.D., at Columbia, charted several ways in which the bacterium has adapted to its hosts. For example, they learned that the human-adapted strain (ST398-NM) contains human-specific immune evasion genes, whereas the livestock-adapted strain does not. They also found that ST398-NM adheres well to human skin, thus increasing its ability to colonize and infect people.

The study authors say it is possible that the ST398-NM strain emerging in northern Manhattan could acquire genes making it resistant to methicillin. Scientists at the NIH National Institute of Allergy and Infectious Diseases and their colleagues plan to continue global surveillance of ST398, paying close attention to its molecular adaptations. Their work promises to inform the development of new diagnostic and surveillance strategies against this emerging pathogen.

This study on the human-adapted variant of ST398 strain complements a study that a different group of scientists published in mBio on Feb. 21. That study, also supported by NIH, focused on the evolution of the ST398 strain in livestock, including the effect of antibiotic use. Lance Price, Ph.D., and Paul Keim, Ph.D., at the Translational Genomics Research Institute in Flagstaff, Ariz., led that study with colleagues from around the world.


'/>"/>

Contact: Ken Pekoc
kpekoc@niaid.nih.gov
301-402-1663
NIH/National Institute of Allergy and Infectious Diseases
Source:Eurekalert

Related medicine news :

1. CROI -- Day 3: Selected highlights of NIH-supported research
2. CROI -- Day 2: Selected highlights of NIH-supported research
3. NIH-supported finding on cocaine addiction: Tiny molecule, big promise
4. Scripps Florida scientists uncover inflammatory circuit that triggers breast cancer
5. UCLA scientists report link between traumatic brain injury, post-traumatic stress disorder
6. Scientists make strides toward fixing infant hearts
7. Scripps research scientists demonstrate effective new biopsy in a blood test to detect cancer
8. Scientists May Be Closer to Developing Red Wine Drug
9. Scientists Use Brain Waves to Eavesdrop on the Mind
10. Scripps research scientists illuminate cancer cells survival strategy
11. Scientists report first step in strategy for cell replacement therapy in Parkinsons disease
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... ... Global Healthcare Management’s 4th Annual Kids Fun Run brought out many kids ... sponsored by Global Healthcare Management’s CEO, Jon Letko, is aimed at getting kids excited ... all ages; it is a non-competitive, non-timed event, which is all about having fun ...
(Date:10/13/2017)... ... October 13, 2017 , ... “America On The Brink”: the ... “America On The Brink” is the creation of published author, William Nowers. Captain ... As a WWII veteran, he spent thirty years in the Navy. Following his ...
(Date:10/12/2017)... Fla. (PRWEB) , ... October 12, 2017 , ... IsoComforter, ... therapy products, announced today the introduction of an innovative new design of the shoulder ... pad so you get maximum comfort while controlling your pain while using cold therapy. ...
(Date:10/12/2017)... PA (PRWEB) , ... October 12, 2017 , ... ... is the recipient of a 2017 Folio Magazine Eddie Digital Award for ‘Best B-to-B ... York City on October 11, 2017. , The annual award competition recognizes editorial and ...
(Date:10/12/2017)... BALTIMORE (PRWEB) , ... October 12, 2017 , ... ... average of $3,296 in property taxes a year. In some states—like New York, ... higher. , By contrast, many overseas retirement havens have extremely low property-tax rates, ...
Breaking Medicine News(10 mins):
(Date:9/22/2017)... DIEGO , Sept. 22, 2017 AVACEN ... medical device is now successfully helping those with the ... Fibromyalgia diagnosed Amanda in Essex, ... dressed and washing my hair, experiencing no sleep at ... in painful spasm… I cannot recommend [the AVACEN 100] ...
(Date:9/19/2017)... ZirMed Inc ., a recognized leader in cloud-based revenue cycle ... ranked #1 by its users for the seventh consecutive year ... ZirMed was recognized as the top-ranked end-to-end revenue cycle management ... 200 beds and holds one of the longest #1 ranking ... ...
(Date:9/18/2017)... R.I. , Sept. 18, 2017 /PRNewswire/ ... the fields of bioinformatics and immune engineering, ... a protective avian influenza A (H7N9) vaccine. ... distantly related to seasonal influenza and presents ... rely on prior exposure to be effective. ...
Breaking Medicine Technology: