Navigation Links
Different strategies underlie the ecology of microbial invasions

Infectious disease can play a key role in mediating the outcome of competition between rival groups, as seen in the effects of disease-bearing conquistadors in the New World--or, on a much smaller ecological scale, the ability of bacteria to spread their viruses to competing bacteria. In a new study, researchers have compared two different general ways in which bacteria compete with one another, and they have found that each strategy seems to be particularly effective under different ecological circumstances--for example, depending on whether the bacteria are rare invaders or abundant residents. The findings, reported by a group of researchers including Sam P. Brown of the University of Texas at Austin, Cambridge University, and University of Montpellier II, and Fran├žois Taddei of University of Paris, appear in the October 24th issue of Current Biology.

Bacteria are not always so fortunate as to grow alone in their environment, and they often face competition from other lineages. One widespread solution is to kill these competitors.

In the new work, the researchers explored the relative value to both invading and defensive bacteria of two distinct microbial mechanisms of killing competitors: through the release of chemicals (for example, antibiotics or bacteriocins) and through the release of parasites (for example, bacterial viruses, known as phages). Focusing on the second mechanism in an experimental setting, the researchers showed that even though some of the invading bacteria can be killed by their own phage parasites, upon their death they release a burst of infectious parasites that can kill competitor bacteria. Unlike chemical killing, released parasites trigger an epidemic among susceptible competitors, which become factories producing more parasites. Amplification therefore makes phage carriers able to successfully compete with phage-susceptible bacteria even faster when the carriers are rare, whereas chemical killers can only win in a we ll-mixed environment when chemical carriers are sufficiently abundant. The findings show that the release of chemical toxins is superior as a resident strategy to repel invasions, whereas the release of parasites is superior as a strategy of invasion.
'"/>

Source:Cell Press


Related biology news :

1. Different microarray systems more alike than previously thought
2. New strategies to reduce hospital-aquired infections
3. Preventing a pandemic: Study suggests strategies for containing a flu outbreak
4. Polio vaccination strategies assessed as eradication nears
5. Fitting in: Newly evolved genes adopt a variety of strategies to remain in the gene pool
6. Newly identified mechanism for silencing genes points to possible anti-cancer strategies
7. US control strategies may make flu epidemics worse, UCLA study shows
8. Guardian of the genome protein found to underlie skin tanning
9. Putting ecology back into river restoration
10. Diverse tropical forests defy metabolic ecology models
11. UMaine teams with fishermen to study affects of trawling on seafloor ecology

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/16/2017)... FRANCISCO , Feb. 16, 2017  Genos, ... today announced that it has received Laboratory Accreditation ... CAP Accreditation is presented to laboratories that meet ... who demonstrate scientifically rigorous processes. "Genos ... excellence in laboratory practices. We,re honored to be ...
(Date:2/13/2017)... 2017  RSA Conference -- RSA, a Dell Technologies ... to enhance fraud detection and investigation across digital ... Fraud & Risk Intelligence Suite. The new platform ... insights from internal and external sources as well ... customers from targeted cybercrime attacks. "Fraudsters ...
(Date:2/10/2017)... , Feb 10, 2017 ... new report "Personalized Medicine - Scientific and Commercial Aspects" ... ... personalized medicine. Diagnosis is integrated with therapy for selection of ... on early detection and prevention of disease in modern medicine. ...
Breaking Biology News(10 mins):
(Date:3/23/2017)... , ... March 23, 2017 , ... ... material that exhibits both viscous and elastic characteristics when deformed, which is identical ... exhibits properties to gently absorb compressive forces and return to its natural state ...
(Date:3/23/2017)... , Mar 23, 2017 Research and ... Global Markets" report to their offering. ... The Global Market ... Billion in 2016 at a CAGR of 8.9%, ... and non-energetic bioproducts into seven major product segments: bio-derived chemicals, ...
(Date:3/23/2017)... MILFORD, Mass. , March 23, 2017 ... leading partner to global in vitro diagnostics ... launch of the industry,s first multiplexed ... inherited disease testing by next-generation sequencing ... materials were developed with input from industry ...
(Date:3/23/2017)... -- BioPharmX Corporation (NYSE MKT: BPMX), a specialty pharmaceutical ... reported financial results for the quarter and year ... update on the company,s clinical development efforts and ... pleased to report that last year was a ... Krammer. "We achieved key clinical milestones and attracted ...
Breaking Biology Technology: