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

Patience may be a virtue in a person, but in an infectious disease, it is insidious. Witness tuberculosis, which can lie dormant in a human host for decades before bursting forth into infection. TB's stealthy nature has made it difficult to decipher how it spreads, seriously hampering efforts to control it. The World Health Organization estimates that a third of the people on Earth are infected.

Now, a study led by Stanford scientists has provided new insights into the behavior of tuberculosis by tracing the travels of a particular strain of the disease that was unintentionally spread among the indigenous peoples of western Canada by French Canadian voyageurs during the fur trade era. Although the disease was probably brought into the native populations repeatedly from about 1710 to 1870, it didn't spark an epidemic until the fur trade had largely ended, more than 150 years from when it was first introduced.

"We found there was this widespread, low-level dispersal of tuberculosis that did not become obvious until environmental changes occurred that created conditions conducive to epidemics," said Caitlin Pepperell, an infectious diseases specialist at Stanford.

The process, she said, resembles the way a smoldering fire can spread underground, through the roots of trees and brush, then burst into fire without warning.

"Tuberculosis epidemics are the outcomes of a process that has effectively been occurring underground," she said unlike smallpox, which quickly escalates into epidemics.

"This helps explain why it has been so extraordinarily difficult to eradicate TB."

The conditions that finally triggered epidemics in Canada in the late 1800s likely resulted from the relocation of native peoples onto reservations, where health conditions were often abysmal.

The biggest factor, she said, was probably malnutrition. The buffalo, once a dietary mainstay of indigenous peoples on the prairie, had been v
'/>"/>

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:12/17/2014)... Valencell, a leader in performance biometric data ... industry leaders such as Intel, Jabra, Atlas, and Scosche ... products. These products will be showcased at CES 2015, ... . "Our partners choose PerformTek ... – with the clinical data to back it up," ...
(Date:12/11/2014)... Dec. 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the ... APAC Region 2015-2019"  report to their offering. ... market is advances in technology. With continuous advances ... solutions to the latest standard that meets the ...
(Date:12/10/2014)... -- You,ve been here before: you desperately need to sign ... site key or the answer to your secret question. What,s ... Today, Hoyos Labs , a digital infrastructure ... put an end to the frustration that comes with usernames, ... leverages a user,s smartphone to acquire his or her biometrics ...
Breaking Biology News(10 mins):Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 3
... NEW YORK (January 14, 2008) Outbreaks of the notorious ... richest center of coral reef biodiversity on Earth, according to ... ARC Centre of Excellence for Coral Reef Studies. The ... its stomach over them and using digestive enzymes to liquefy ...
... Service Weekly PressPac with news from ACS 36 peer-reviewed journals ... the American Chemical Society as the source for this information. ... which is embargoed for 9 A. M., Eastern Time, Jan. ... Seagull blood shows promise for monitoring pollutants ...
... ARBOR, Mich.---An international study of 20,000 people found seven ... factor in heart disease, and confirmed 11 other genes ... international study led by researchers from the University of ... or confirm genetic variants that influence lipid levels, and ...
Cached Biology News:Starfish outbreak threatens corals 2American Chemical Society's weekly PressPac -- Jan. 9, 2008 2American Chemical Society's weekly PressPac -- Jan. 9, 2008 3American Chemical Society's weekly PressPac -- Jan. 9, 2008 4American Chemical Society's weekly PressPac -- Jan. 9, 2008 5American Chemical Society's weekly PressPac -- Jan. 9, 2008 6American Chemical Society's weekly PressPac -- Jan. 9, 2008 7American Chemical Society's weekly PressPac -- Jan. 9, 2008 8American Chemical Society's weekly PressPac -- Jan. 9, 2008 9Study locates cholesterol genes; finds surprises about good, bad cholesterol 2
(Date:12/19/2014)... iLab Solutions, the global leader in ... Bryant as the new Director of Institutional Implementations and ... These two new leadership positions were created to support ... that iLab continues to meet the needs of its ... iLab has been deployed at over 450 core facilities ...
(Date:12/19/2014)... MILLBROOK, N.Y. , Dec. 18, 2014 Egenix, ... has been elected Chairman of the Board, to succeed ... President and CEO, but will continue as a member of ... that he has added to the company over almost twenty ... The Board of Directors has established a Search ...
(Date:12/17/2014)... December 16, 2014 “Never say, ... Philipps- Universität Marburg’s Department of Physics, advises young ... the newly released SPIE Women in Optics ... too shy to ask questions.” , In the ... and mathematics) occupations ranging from university professor and ...
(Date:12/17/2014)... Xeno Diagnostics has again received ... recent COLA inspection. Xeno has met all criteria ... accreditation organization. Accreditation is earned only by laboratories ... operations, demonstrate continued accuracy in the performance of ... survey. , While the Laboratory Excellence ...
Breaking Biology Technology:iLab Solutions Announces Two New Leadership Positions to Meet the Needs of Its Growing Customer Base 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 3Xeno Diagnostics Receives 3rd Award for Laboratory Excellence 2
... Call on Thursday, November 5, 2009 at 4:30 p.m. ... /PRNewswire-FirstCall/ - OncoGenex Pharmaceuticals, Inc. ("OncoGenex" or the "Company") ... for the third quarter and nine months ended September ... third quarter of 2009. , The following consolidated results ...
... Wound Management Technologies, Inc., (WNDM), announced today that it has ... assets of Virtual Health Technologies, Inc. (OTC Bulletin Board: VHGI). ... cash and debt, 4,000,000 shares of WNDM and a royalty ... being acquired from VHGI. WNDM closed at $2.00 ...
... Nov. 5 /PRNewswire-Asia-FirstCall/ -- BMP Sunstone,Corporation (Nasdaq: BJGP ) ... to release third quarter 2009 financial results on,Monday, November 9, ... The Company will hold a conference call at 5:00 pm ... Listeners may access the call by,dialing 1-888-713-4211 or 1-617-213-4864 ...
Cached Biology Technology:OncoGenex Reports Third Quarter 2009 Financial Results 2OncoGenex Reports Third Quarter 2009 Financial Results 3OncoGenex Reports Third Quarter 2009 Financial Results 4OncoGenex Reports Third Quarter 2009 Financial Results 5OncoGenex Reports Third Quarter 2009 Financial Results 6OncoGenex Reports Third Quarter 2009 Financial Results 7OncoGenex Reports Third Quarter 2009 Financial Results 8OTCBB-WNDM Announces LOI to Acquire VHGI Assets for $10 Million Cash/Stock 2OTCBB-WNDM Announces LOI to Acquire VHGI Assets for $10 Million Cash/Stock 3BMP Sunstone to Report Third Quarter 2009 Financial Results 2
... the consumable measurement plate for ... individually controlled measurement sites. Each ... liquid flow channel system that ... solution and compound applications necessary ...
This bispecific antibody complex has been tested for efficient depletion of CD41+ cells using the StemSep ; negative immunomagnetic cell separation system....
... Caliper's iLink makes it easy to supply ... instruments. Developed with operator convenience in mind, ... shoot' ease of use. The iLink software ... for assays or sub-assays, that can be ...
No-Weigh Dithiothreitol (DTT) ,7.7 mg DTT/Tube x 48 tubes...
Biology Products: