Navigation Links
Tuberculosis strain spread by the fur trade reveals stealthy approach of epidemics
Date:4/11/2011

irtually exterminated by then. Other principal food sources, such as other animals, wild plants and fish, were also severely depleted and attempts to provide famine relief fell woefully short.

Housing was also of low quality, with too many people living in close quarters, often lacking adequate ventilation or protection against the elements.

"With tuberculosis, even such simple things as having windows that open can actually make quite a large difference in terms of the risk of transmission," Pepperell said. "Any situation where there is poor ventilation, it is dark and it is crowded is perfect for transmitting TB."

Pepperell, a physician and an instructor in the division of infectious diseases at Stanford's School of Medicine, is the lead author of a paper about the study published online by Proceedings of the National Academy of Sciences this week.

"Up to now, it has been relatively hard to define the locations of origin of a strain of tuberculosis more precisely than a continent," said Marcus Feldman, professor of biology and a co-author of the paper. By looking at large numbers of bacterial samples and integrating genetic analysis with the work of fur trade historians, the researchers gained insight into how this particular strain must have spread.

They worked with archived M. tuberculosis bacterial samples from indigenous communities across Alberta, Saskatchewan and Ontario that had been previously collected by provincial health authorities. All the analyses were done on bacteria, not people. The scientists found a single strain of tuberculosis, characterized by a specific mutation, dominated in every community.

Earlier research had established that the same strain was also dominant among French Canadian residents of Quebec.

"The tuberculosis strains from Quebec are missing a specific piece of DNA; that's how you can track them back to Quebec," Feldman said.

Tuberculosis can only be
'/>"/>

Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. 2 in 1: Multi-tasking protein provides new approaches for anti-tuberculosis drugs
2. Gates Foundation continues funding of tuberculosis research at Weill Cornell
3. TB-drugome provides new targets for anti-tuberculosis drug discovery
4. New tool in the fight against tuberculosis
5. Study finds possible persistence switch for tuberculosis
6. Bodys own proteins may lead the way in global fight against tuberculosis
7. Genome of bacteria responsible for tuberculosis of olive tree sequenced
8. Immune evasion common in many viruses, bacteria and parasites is uncommon in M. tuberculosis
9. Scientists take step toward simple and portable tuberculosis tests for developing world
10. Iowa State University researcher uncovers potential key to curing tuberculosis
11. In India: A search for more effective tuberculosis drugs
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Tuberculosis strain spread by the fur trade reveals stealthy approach of epidemics
(Date:12/11/2014)... 2014  That blood pressure plays a role in human ... the medical term for high blood pressure – was first ... inflatable cuff that,s used in measuring blood pressure was invented ... new about hypertension, its triggers and its effects. In fact, ... and the best ways to treat it. For ...
(Date:12/10/2014)... 2014  Valencell, a leader in performance biometric data ... demand from its licensees for highly accurate, clinically validated ... solely coming from fitness and health sectors, but first ... wearable is only as useful as the biometric data ... driver in long-term mass consumer adoption of wearable products," ...
(Date:12/10/2014)... --Research and Markets ( http://www.researchandmarkets.com/research/xclcvw/biometrics_market ) ... Market in Japan 2014-2018" report to their ... The integration of biometrics and smart ... upgradation of the driver,s license is one of ... the aforementioned projects, biometrics is being used as ...
Breaking Biology News(10 mins):Research points to need for new approaches to treatment of high blood pressure 2Research points to need for new approaches to treatment of high blood pressure 3Research points to need for new approaches to treatment of high blood pressure 4Wearable Technology Products Demand Highly Accurate Biometric Technology 2Biometrics Market in Japan 2014-2018: Key Vendors are DDS, Fujitsu, Hitachi and NEC 2
... holes in the limestone of the ocean floor using teeth ... their secrets, which might give engineers insights into creating ever-sharp ... fit their globular bodies using their five teeth, which, like ... continue to grow on the other end throughout the animals, ...
... Many proteins do not function by themselves as ... larger structures called protein complexes. The May issue ... ) features a set of methods that can be ... article details the generation of viral vectors for gene ...
... Fla. (May 4, 2009) The American Society for ... April 30 May 2 in Clearwater Beach, Florida, has ... to Howard J. Federoff, MD, PhD, Executive Vice President for ... at Georgetown University. , The Award is named for Bernard ...
Cached Biology News:True grit 2Protein analysis methods, viral vectors featured in Cold Spring Harbor Protocols 2Georgetown University's Howard J. Federoff, M.D., Ph.D. receives Bernard Sanberg Memorial Award 2
(Date:12/19/2014)... December 19, 2014 In contrast to ... LEDs with various colors, Valoya uses proprietary LED technology ... offers best possible uniformity which is critical in low ... high spectral accuracy throughout its lifetime which is up ... tubes. , "The investment cost was clearly higher ...
(Date:12/19/2014)... 2014 Egenix, Inc. is pleased to announce that ... the Board, to succeed Donald Fresne ; Mr. Fresne ... as a member of the Board.  In recognition of the ... company over almost twenty years, the Board designated Mr. Fresne ... has established a Search Committee to find a suitable replacement ...
(Date:12/17/2014)... Based on the revenues gained from surgical ... dominated by four major players contributing to approximately ... include GE Healthcare (U.K.), Siemens AG (Germany), Philips ... Report Copy at http://www.marketsandmarkets.com/Market-Reports/surgical-imaging-market-210534462.html , The ... to its strong product portfolio, which includes its ...
(Date:12/17/2014)... Long Beach, CA (PRWEB) December 17, 2014 ... Technology, Inc. to provide a larger packaged waste water ... district in King Abdullah Economic City (KAEC). Two years ... for EMAAR’s Jeddah Gate Development, serving two residential towers ... plant capacity is over a quarter million gallons per ...
Breaking Biology Technology:Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 2Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 3Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 4
... drug for kidney-disease patients, is being acquired for $600 million. ... Angel Network gives entrepreneurs and angel investors a new way ... Original air date: Saturday, May 7, 2005 ... more about the big acquisition ...
... Marshfield Clinic has embarked on a novel project ... factors that may contribute to the disease. , ,The ... than 18,000 DNA samples Marshfield Clinic has gathered for ... largest bio-banking efforts. Capitalizing on Marshfield's extensive database of ...
... — One computer just isn't enough. Researchers at ... turning to big groups of tightly networked computers that ... ,UW-Madison professors Wesley Smith and David Schwartz are working ... make their data-crunching tasks manageable. The system used is ...
Cached Biology Technology:Marshfield study mixes DNA into electronic medical record to screen for Alzheimer's 2Marshfield study mixes DNA into electronic medical record to screen for Alzheimer's 3
... SpeedVac™ Concentrators set the standard for sample concentration ... with large chamber uses a combination of centrifugal ... in a single run. , SC210A comes equipped ... for long lasting chemical compatibility ...
Digital display of time, vacuum and temperature , Dual vacuum control of ramping rate and ultimate level , Comes complete with RH40-12 (40 x 1.5 ml) Rotor and (2) Glass Condensation Flasks. ...
... series of vacuum concentrators/centrifugal evaporators offers a ... to rapid and safe concentration of heat-labile ... with oil-free or high vacuum pumps, a ... selection of rotors (eliminating sample loss by ...
... George Paxinos Affiliation: School of Psychology, The University ... Affiliation: Curtin University of Technology, Perth, Australia This ... of the rat brain. It is a ... revison and extension of the compact 3rd edition. ...
Biology Products: