Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Bacterial spread all down to chance: some strains ‘just the lucky ones’


Scientists have discovered that factors such as human immunity and drug resistance are less important to the success of bacterial spread than previously thought.

According to research published online this week in Proceedings of the National Academy of Sciences most of the variation in the spread of bacterial pathogens occurs simply by chance.

The team from Imperial College London studied three famously deadly species: Neisseria meningitidis, which causes outbreaks of meningitis; Streptococcus pneumoniae, which kills 1.8 million people around the world every year, and Staphylococcus aureus, which in its drug resistant form is better known as MRSA. They compared the genetic make-up of these bacteria with a computer simulation which allowed them to test various evolutionary scenarios.

They found evidence that bacterial communities mirror the social life of the humans they infect. For example, close family members or friends in the same class at school or nursery are more likely to share an infection due to increased contact. After accounting for these differences in the opportunities for person-to-person spread, the researchers were amazed to find that there was little evidence for differences in the ability of pathogen strains to spread.

Dr Christophe Fraser, from Imperial College London, a Royal Society University Research Fellow and one of the authors, says: “Microbiologists have assumed for some time that some disease strains spread more successfully than others. In fact we found that the variation in the communities we studied could be explained by chance. This was surprising, especially considering all the potential advantages one pathogen can have over another, such as antibiotic resistance and differences in host immunity.”

Dr Bill Hanage, from Imperial College London, and also one of the authors, says: “When we look at a sample and see that some strains are much more common than others, it’s tempting to think that there must be something special about them. In fact, they could just be the lucky ones, and that’s what it looks like here. Most of the variation in the spread of these pathogens can be explained by chance alone.”

Tony Stephenson | alfa
Further information:

More articles from Life Sciences:

nachricht Gene therapy shows promise for treating Niemann-Pick disease type C1
27.10.2016 | NIH/National Human Genome Research Institute

nachricht 'Neighbor maps' reveal the genome's 3-D shape
27.10.2016 | International School of Advanced Studies (SISSA)

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

'Neighbor maps' reveal the genome's 3-D shape

27.10.2016 | Life Sciences

Gene therapy shows promise for treating Niemann-Pick disease type C1

27.10.2016 | Life Sciences

Solid progress in carbon capture

27.10.2016 | Power and Electrical Engineering

More VideoLinks >>>