Corporate Banner
Satellite Banner
Scientific Community
Become a Member | Sign in
Home>News>This Article

Single Animal to Human Transmission Event Responsible for 2014 Ebola Outbreak

Published: Saturday, August 30, 2014
Last Updated: Saturday, August 30, 2014
Bookmark and Share
NIH-funded scientist uses latest genomic technology to make discovery.

Scientists used advanced genomic sequencing technology to identify a single point of infection from an animal reservoir to a human in the current Ebola outbreak in West Africa. This research has also revealed the dynamics of how the Ebola virus has been transmitted from human to human, and traces how the genetic code of the virus is changing over time to adapt to human hosts. Pardis Sabeti, M.D., Ph.D, a 2009 National Institutes of Health Director’s New Innovator awardee and her team carried out the research.

“Dr. Sabeti’s research shows the power of using genomic analysis to track emerging viral outbreaks,” said NIH Director Francis S. Collins, M.D., Ph.D. “This ability produces valuable information that can help inform public health decisions and actions.”

The 2014 Ebola outbreak is now the largest outbreak in history, with current estimates of 2,473 infections and 1350 deaths since it began in late December 2013 according to the World Health Organization. This outbreak is also the first in West Africa and the first to affect urban areas. There are no approved drugs for Ebola virus disease, though prompt diagnosis and aggressive supportive care can improve survival. The disease is characterized by high fever, headache, body aches, intense weakness, stomach pain, and lack of appetite. This is followed by vomiting, diarrhea, rash, impaired kidney and liver function and in some cases, internal and external bleeding.

To better understand why this outbreak is larger than previous outbreaks, Dr. Sabeti, senior associate member of the Broad Institute, Cambridge, Massachusetts, led an extensive analysis of the genetic makeup of Ebola samples from patients living in affected regions. Joined by an international team of scientists, Dr. Sabeti used advanced technology to analyze the genetics of the Ebola samples extremely rapidly and with high levels of accuracy. Using this technology, the researchers pinpointed a single late 2013 introduction from an unspecified animal reservoir into humans. Their study showed that the strain responsible for the West African outbreak separated from a closely related strain found in Central Africa as early as 2004, indicating movement from Central to West Africa over the span of a decade. Studying RNA changes occurring over the span of the outbreak suggests that the first human infection of the outbreak was followed by exclusive human to human transmissions.

While analyzing the genetic makeup of the Ebola samples, Dr. Sabeti and colleagues discovered a number of mutations that arose as the outbreak spread. Some of these mutations, termed nonsynonymous mutations, alter the biological state of the virus and may allow it to continually and rapidly adapt to human immune defenses as the outbreak continues. This feature points to the need for improved methods that will allow for close monitoring of changes in the viral genome and the impact on vaccine targets. Such monitoring, called genomic surveillance, can provide important insights into the biology of how the Ebola virus spreads and evolves. It may also allow scientists to develop improved methods to detect infection, and point the way to new and improved drug and vaccines.

Dr. Sabeti’s New Innovator Award is designed to support exceptionally creative new investigators conducting innovative and high-impact research, as part of the NIH Common Fund’s High-Risk, High-Reward program. The original focus of her research was on Lassa fever, a related but distinct hemorrhagic disease. When the Ebola outbreak began, she shifted her research focus to address this pressing challenge.

“Dr. Sabeti’s New Innovator Award provided flexibility to quickly adjust her research when the 2014 Ebola outbreak began,” said James M. Anderson M.D., Ph.D. director of the Division of Program Coordination, Planning and Strategic Initiatives at NIH. “This exemplifies how the High-Risk, High- Reward program allows researchers to tackle the most challenging and urgent scientific questions.”

The NIH Common Fund supports a series of exceptionally high impact research programs that are broadly relevant to health and disease. Common Fund programs are designed to overcome major research barriers and pursue emerging opportunities for the benefit of the biomedical research community at large. The research products of the Common Fund programs are expected to catalyze disease-specific research supported by the NIH Institutes and Centers.

Further Information
Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 2,700+ scientific posters on ePosters
  • More than 3,800+ scientific videos on LabTube
  • 35 community eNewsletters

Sign In

Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

NIH Breast Cancer Research to Focus On Prevention
A new phase of the Breast Cancer and the Environment Research Program (BCERP), focused on prevention, is being launched at the National Institutes of Health.
Friday, October 09, 2015
NIH Grantees Win 2015 Nobel Prize in Chemistry
The 2015 Nobel Prize in chemistry has been awarded to NIH grantees Paul Modrich, Ph.D., of the Howard Hughes Medical Institute and the Duke University School of Medicine, Durham, N.C.; and Aziz Sancar, M.D., Ph.D., of the University of North Carolina, Chapel Hill, N.C.,.
Thursday, October 08, 2015
New Gene Therapy for Vision Loss From a Mitochondrial Disease
NIH-funded study shows success in targeting mitochondrial DNA in mice.
Tuesday, October 06, 2015
NIH Funding Targets Gaps in Biomedical Research
New awards support emerging issues in cutting-edge biomedical research fields.
Tuesday, October 06, 2015
Scientists Test New Gene Therapy for Vision Loss from a Mitochondrial Disease
NIH-funded study shows success in targeting mitochondrial DNA in mice.
Tuesday, October 06, 2015
Dormant Viral Genes May Awaken to Cause ALS
NIH human and mouse study may open an unexplored path for finding treatments.
Thursday, October 01, 2015
Scientists Create World’s Largest Catalog of Human Genomic Variation
An international team of scientists from the 1000 Genomes Project Consortium has created the world’s largest catalog of genomic differences among humans, providing researchers with powerful clues to help them establish why some people are susceptible to various diseases.
Thursday, October 01, 2015
Genetic Adaptations to Diet and Climate
Researchers found genetic variations in the Inuit of Greenland that reflect adaptations to their specific diet and climate.
Tuesday, September 29, 2015
Grants to Help Identify Variants in the Genome’s Regulatory Regions
New computational approaches needed to wade through millions of inherited DNA differences to find which ones matter.
Thursday, September 24, 2015
Grants Awarded to Explore the Genome’s Regulatory Regions that Affect Disease Risk
New computational approaches needed to wade through millions of inherited DNA differences to find which ones matter.
Tuesday, September 22, 2015
NIH Framework Points The Way Forward For Developing The President’s Precision Medicine Initiative
The NIH Advisory Committee to the Director has presented to NIH Director Francis S. Collins, M.D., Ph.D., a detailed design framework for building a national research participant group, called a cohort, of 1 million or more Americans to expand our knowledge and practice of precision medicine.
Monday, September 21, 2015
Diet, Exercise, Smoking Habits and Genes Interact To Affect and Risk
NIH-funded study points to converging factors that drive disease-related inflammation.
Thursday, September 17, 2015
NIH Grants Seek Best Ways To Combine Genomic Information and EHRs
Researchers seek to better understand genomic basis of disease, provide tailored care to patients.
Friday, September 04, 2015
Cellular Factors that Shape the 3D Landscape of the Genome Identified
Researchers have identified 50 cellular factors required for the proper 3D positioning of genes by using novel large-scale imaging technology.
Tuesday, August 18, 2015
Nuclear Process in the Brain That May Affect Disease Uncovered
Scientists have shown that the passage of molecules through the nucleus of a star-shaped brain cell, called an astrocyte, may play a critical role in health and disease.
Tuesday, August 18, 2015
Scientific News
Gene Editing Could Enable Pig-To-Human Organ Transplant
The largest number of simultaneous gene edits ever accomplished in the genome could help bridge the gap between organ transplant scarcity and the countless patients who need them.
Antioxidants Cause Malignant Melanoma to Metastasize Faster
Fresh research at Sahlgrenska Academy has found that antioxidants can double the rate of melanoma metastasis in mice.
UC San Diego Team Up with Illumina to Speed-Read Your Microbiome
Data analysis app accelerates studies aimed at using microbes to predict, diagnose and treat human diseases.
Paving the Way for Diamonds to Trace Early Cancers
Researchers from the University of Sydney reveal how nanoscale 'diamonds' can light up early-stage cancers in MRI scans.
Researchers Develop Classification Model for Cancers Caused by KRAS
Most frequently mutated cancer gene help oncologists choose more effective cancer therapies.
Chromosomal Chaos
Penn study forms basis for future precision medicine approaches for Sezary syndrome
Shaking Up the Foundations of Epigenetics
Researchers at the Centre for Genomic Regulation (CRG) and the University of Barcelona (UB) published a study that challenges some of the current beliefs about epigenetics.
Genetic Defences of Bacteria Don’t Aid Antibiotic Resistance
Genetic responses to the stresses caused by antibiotics don’t help bacteria to evolve a resistance to the medications, according to a new study by Oxford University researchers.
Tolerant Immune System Increases Cancer Risk
Researchers have found that individuals with high immunoCRIT ratios may have an increased risk of developing certain cancers.
Developing a Gel that Mimics Human Breast for Cancer Research
Scientists at the Universities of Manchester and Nottingham have been funded to develop a gel that will match many of the biological structures of human breast tissue, to advance cancer research and reduce animal testing.
Skyscraper Banner

Skyscraper Banner
Go to LabTube
Go to eposters
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
2,700+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
3,800+ scientific videos