Navigation Links
Weakness can be an advantage in surviving deadly parasites, a new study shows
Date:3/31/2012

When battling an epidemic of a deadly parasite, less resistance can sometimes be better than more, a new study suggests.

A freshwater zooplankton species known as Daphnia dentifera endures periodic epidemics of a virulent yeast parasite that can infect more than 60 percent of the Daphnia population. During these epidemics, the Daphnia population evolves quickly, balancing infection resistance and reproduction.

A new study led by Georgia Institute of Technology researchers reveals that the number of vertebrate predators in the water and the amount of food available for Daphnia to eat influence the size of the epidemics and how these "water fleas" evolve during epidemics to survive.

The study shows that lakes with high nutrient concentrations and lower predation levels exhibit large epidemics and Daphnia that become more resistant to infection by the yeast Metschnikowia bicuspidata. However, in lakes with fewer resources and high predation, epidemics remain small and Daphnia evolve increased susceptibility to the parasite.

"It's counterintuitive to think that hosts would ever evolve greater susceptibility to virulent parasites during an epidemic, but we found that ecological factors determine whether it is better for them to evolve enhanced resistance or susceptibility to infection," said the study's lead author Meghan Duffy, an assistant professor in the School of Biology at Georgia Tech. "There is a trade-off between resistance and reproduction because any resources an animal devotes to defense are not available for reproduction. When ecological factors favor small epidemics, it is better for hosts to invest in reproduction rather than defense."

This study was published in the March 30, 2012 issue of the journal Science. The research was supported by the National Science Foundation and the James S. McDonnell Foundation.

In addition to Duffy, also contributin
'/>"/>

Contact: Abby Robinson
abby@innovate.gatech.edu
404-385-3364
Georgia Institute of Technology Research News
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Cancers sweet tooth may be weakness
2. Study reveals H1N1 unexpected weakness
3. New ORNL sensor exploits traditional weakness of nano devices
4. Scientists identify treatable weakness in lethal form of prostate cancer
5. Evolving to fight epidemics: Weakness can be an advantage
6. Take advantage of reduced pre-registration rates for the IOF World Congress on Osteoporosis
7. Musicians have biological advantage in identifying emotion in sound
8. No consistent advantage for planting soybean early
9. New DNA and RNA aptamers offer unique therapeutic advantages
10. Disproportionate effects of global warming and pollution on disadvantaged communities
11. Oscar Pistorius artificial limbs give him clear, major advantage for sprint running
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Weakness can be an advantage in surviving deadly parasites, a new study shows
(Date:9/30/2014)... 2014--Sea monkeys have captured the popular attention of both ... life cycle -- sold as dehydrated eggs, these tiny ... more than a tank of salt water. , ... other zooplankton, brine shrimp vertically migrate in large groups ... the surface at night and retreating deeper during the ...
(Date:9/30/2014)... team of environmental scientists and engineers, led by ... a three-year, $5.25 million grant from the U.S. ... Research to make a direct positive impact on ... and disposal of radioactive contaminants. , "Understanding the ... dealing with environmental aspects of nuclear technologies is ...
(Date:9/30/2014)... can live in almost any aquatic environment on Earth, ... many species are pushed to the limit. The amount ... prove critical for how different species cope in the ... University of Gothenburg, published in the scientific journal ... change continues apace thanks to increasing levels of greenhouse ...
Breaking Biology News(10 mins):Laser-guided sea monkeys show how zooplankton migrations may affect global ocean currents 2Researchers get $5.25 million to advance nuclear technologies in South Carolina 2Shape up quickly -- applies to fish, too! 2
... the Bellvitge Biomedical Research Institute (IDIBELL) at the ... into how the IDPN nitrile causes neurological syndromes ... (ALS), a severe neuromuscular degenerative disease. The study, ... in Neuropathology and Applied Neurobiology journal. ...
... to dust off the garden tables and chairs. But garden furniture ... covered with a slimy film of algae, moss, bacteria and fungi ... hoping that they can solve this problem by incorporating titanium dioxide ... adding a little bit of sunlight. When these titanium dioxide molecules ...
... German . Zebrafish share most organ systems ... the causes of human diseases like cancer or heart diseases. ... With the European Zebrafish Resource Center (EZRC), Karlsruhe Institute of ... such lines in Europe. The EZRC is funded jointly by ...
Cached Biology News:Poisoning from industrial compounds can cause similar effects to ALS 2Cleaning with sunlight 2Zebrafish -- the stars of biomedicine 2
(Date:10/2/2014)... 2014 Permian Plastics, http://www.permianplastics.com ... Louis, Missouri, area on October 24th, 1994. Since ... plastic injection molder in the Midwest. The company operates ... supplier to many Fortune 500 clients. , Permian Plastics ... of the way, from concept to completion, going the ...
(Date:10/2/2014)... 02, 2014 The National Institutes ... (LLNL) a grant today to develop an electrode ... understand how the brain works through unprecedented resolution ... of NIH's efforts to support President Obama's BRAIN ... new research effort to revolutionize our understanding of ...
(Date:10/2/2014)... 2 de octubre de 2014 Laborie Medical ... Ontario , ha completado la adquisición de Unisensor ... Unisensor tiene su sede central sita en Wiesendangen, Suiza, ... Portsmouth, New Hampshire . Unisensor está ... de alta resolución para evaluar la presión y valores ...
(Date:10/2/2014)... WALTHAM, Mass. , Oct. 2, 2014 /PRNewswire/ ... and Drug Administration has granted Fast Track designation ... for the treatment of sickle cell disease.  NKTT120 ... iNKT cells, a regulatory T cell that has ... organ damage in preclinical models of sickle cell ...
Breaking Biology Technology:Permian Plastics LLC Celebrates 20 Years As Leading Manufacturer of Plastic Molds 2NIH taps Lawrence Livermore to Develop Sophisticated Electrode Array System to Monitor Brain Activity 2NIH taps Lawrence Livermore to Develop Sophisticated Electrode Array System to Monitor Brain Activity 3NIH taps Lawrence Livermore to Develop Sophisticated Electrode Array System to Monitor Brain Activity 4LABORIE adquiere Unisensor AG y Unisensor USA, Inc. 2FDA Grants Fast Track Designation to NKT Therapeutics' NKTT120 for the Treatment of Sickle Cell Disease 2
... 15 MannKind,Corporation (Nasdaq: MNKD ), focused on ... today that it,will present at the UBS Global Life ... (ET) at the Grand Hyatt in New York., ... web cast of the,presentation in the Investor Relations section ...
... Join as Company Enters Commercialization Phase, NAPLES, ... TO ETHANOL(TM), the most advanced third generation biofuels,technology, ... with the,appointments Greg Schlicht as Senior Vice President ... as Senior Program Manager., Mr. Schlicht will ...
... Sept. 15 Insmed Inc. (Nasdaq:,INSM) a developer ... Allan, Ph.D., CEO of Insmed, will present at ... will be discussing,the Company,s perspective on the potential ... will also Chair a panel on this topic ...
Cached Biology Technology:Algenol Biofuels Further Strengthens Team With Key Appointments 2Insmed to Present at Biosimilars 2008 Conference 2
Human SEAP ORF, provided in a pORF plasmid. pORF is an expression plasmid selectable with Ampicillin....
... of purified RNA samples., , This product ... aqueous RNA samples that have been pre-purified ... silica, oligo dT etc or other kits. ... necessary components for the stabilization of nanogram ...
... These 2800mL wide mouth PYREX Fernbach-style culture ... center of the flask bottom to achieve ... triple baffled flasks have a Delong-style 38mm ... steel closures. For plastic closures see Nos. ...
... template is designed to allow neomycin/kanamycin selection ... FRT-PGK-gb2-neo-FRT template encodes the neomycin/kanamycin resistance gene ... expression of kanamycin resistance in E.coli ... expression of neomycin resistance in mammalian cells. ...
Biology Products: