Featured Research

from universities, journals, and other organizations

Bacterial Spread All Down To Chance: Some Strains 'Just The Lucky Ones'

Date:
February 7, 2005
Source:
Imperial College London
Summary:
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.

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

Related Articles


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."


Story Source:

The above story is based on materials provided by Imperial College London. Note: Materials may be edited for content and length.


Cite This Page:

Imperial College London. "Bacterial Spread All Down To Chance: Some Strains 'Just The Lucky Ones'." ScienceDaily. ScienceDaily, 7 February 2005. <www.sciencedaily.com/releases/2005/02/050204212755.htm>.
Imperial College London. (2005, February 7). Bacterial Spread All Down To Chance: Some Strains 'Just The Lucky Ones'. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2005/02/050204212755.htm
Imperial College London. "Bacterial Spread All Down To Chance: Some Strains 'Just The Lucky Ones'." ScienceDaily. www.sciencedaily.com/releases/2005/02/050204212755.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Christmas Kissing Good for Health

Christmas Kissing Good for Health

Reuters - Innovations Video Online (Dec. 22, 2014) Scientists in Amsterdam say couples transfer tens of millions of microbes when they kiss, encouraging healthy exposure to bacteria. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Brain-Dwelling Tapeworm Reveals Genetic Secrets

Brain-Dwelling Tapeworm Reveals Genetic Secrets

Reuters - Innovations Video Online (Dec. 22, 2014) Cambridge scientists have unravelled the genetic code of a rare tapeworm that lived inside a patient's brain for at least four year. Researchers hope it will present new opportunities to diagnose and treat this invasive parasite. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Earthworms Provide Cancer-Fighting Bacteria

Earthworms Provide Cancer-Fighting Bacteria

Reuters - Innovations Video Online (Dec. 21, 2014) Polish scientists isolate bacteria from earthworm intestines which they say may be used in antibiotics and cancer treatments. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Reuters - Innovations Video Online (Dec. 21, 2014) A team of scientists led by Danish chemist Jorn Christensen says they have isolated two chemical compounds within an existing antipsychotic medication that could be used to help a range of failing antibiotics work against killer bacterial infections, such as Tuberculosis. Jim Drury went to meet him. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins