HOME >> BIOLOGY >> NEWS
Prevalence of infection in a population can shape parasite virulence

If necessity is the mother of invention, the coevolutionary arms race is the mother of adaptation. For parasites and hosts engaged in an ongoing battle to gain advantage, those adaptations take many forms. In a new analysis in the premier open access journal PLoS Biology, Stephanie Bedhomme, Yannis Michalakis, and colleagues extend traditional methods of studying the coevolution of parasite virulence and host life history traits by introducing an additional variable: intraspecific competition between hosts. Unsurprisingly, the authors find that infected individuals pay a cost compared to their healthy counterparts. But surprisingly, both infected and uninfected individuals do better when their competitor is infected: parasite costs Vand virulence V therefore depend on the infection status of the competitors and for an infected mosquito, at least, you stand a better chance of getting your wings and leaving the natal lagoon if more of your larval neighbors are infected too.

To study the interplay between parasitism and intraspecific competition, Bedhomme et al. worked with the yellow fever mosquito Aedes aegypti and its natural enemy, the single-celled parasite Vavraia culicis. They divided recently hatched mosquito larvae into groups of 60 larvae, and exposed half of the groups to the parasite. Larvae were then placed two by two into vials. Vials contained either two uninfected larvae, two infected larvae, or one infected and one uninfected individual. Infected pairs took longer to develop than uninfected pairs, as expected. But with infected and uninfected pairs, infected larvae took longer to develop than their healthy partners, meaning they are more likely to succumb to the parasite. Competing against a healthy partner increased virulence by increasing development time. Interestingly, however, infected mosquitoes also fared better when paired with an infected competitor. These results suggest that a high incidence, or pre
'"/>

Contact: Paul Ocampo
press@plos.org
415-624-1224
Public Library of Science
18-Jul-2005


Page: 1 2

Related biology news :

1. Prevalence of overactive bladder is overestimated
2. Risk of common vaginal infection linked to preterm birth appears higher for blacks
3. High rates of HIV infection documented among young Nepalese girls sex-trafficked to India
4. Pets could be source of multiresistant bacteria infections in humans, MU researchers investigate
5. Injection drug use and HIV and HCV infections among Ontario prison inmates
6. Injection drug use the most important risk factor for HIV and HCV infections among Quebec prisoners
7. Mucins stand guard against gut infections
8. Bernese Mountain Dogs prone to Borrelia burgdorferi infection
9. New compound effectively treats fungal infections
10. Researchers discover acquired DNA key to certain bacterial infection
11. PET/CT use expands: Effectively diagnosing graft infections

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Prevalence infection population can shape parasite virulence

(Date:8/25/2014)... and Emergency Services of Western Australia, a bushfire ADVICE remains ... east of Broome, and Cape Leveque Road approximately 40 kilometres ... is no threat to lives or homes but there is ... a complex of fires burning in the area on both ... The fires are also burning on the eastern side of ...
(Date:8/25/2014)... PHOENIX, Ariz. and ROSEMONT, Ill. Aug. 25, ... technology and innovation, and the Translational Genomics Research ... today announced that the Pac-12,s Arizona State University ... participate in a genetic research study designed to ... in its second year, the joint research project ...
(Date:8/25/2014)... 25, 2014  Scribe Labs unveiled its first ... and saw its campaign surpass the $50,000 funding ... kinematic metrics that help an athlete understand how ... their running mechanics. Built with an advanced 9-axis ... most advanced set of running metrics available outside ...
Breaking Biology News(10 mins):Riddell, TGen team with ASU football to further genetic research into concussion detection 2Riddell, TGen team with ASU football to further genetic research into concussion detection 3runScribe Fitness Wearable Exceeds 200% of Kickstarter Goal in First Week 2
(Date:8/26/2014)... , Aug. 26, 2014 Trovagene, ... Next Generation Dx Summit; Moving Assays to the ... Detection and Monitoring of Cell Free Tumor DNA ... analytical component of its Precision Cancer Monitoring (PCM) ... clinical sensitivity for the detection of tumor DNA ...
(Date:8/26/2014)... YORK , Aug. 26, 2014  That,s Nice ... science markets, today announced the formation of a new ... content development. The expanded team will combine current and ... areas at That,s Nice. Guy ... Content to lead the team. Tiene was previously Director ...
(Date:8/26/2014)... After searching for a more ... , the University of Kansas Medical Center and ... iLab Solutions' web-based core facility management system to ... "We are very pleased that the University of ... on with us,” stated Heather Lorenz, iLab’s VP, ...
(Date:8/26/2014)... NEW YORK , Aug. 26, 2014 /PRNewswire-iReach/ -- ... posture-improving belt, is in full effect on the popular ... to show their support for the biofeedback belt. The ... order to mass-produce and distribute the product. ... is a small device worn on the lower back ...
Breaking Biology Technology:Highly Sensitive and Quantitative Analytical Performance is Translational for Clinical Utility of Cell-Free Tumor DNA Diagnostics 2Highly Sensitive and Quantitative Analytical Performance is Translational for Clinical Utility of Cell-Free Tumor DNA Diagnostics 3Highly Sensitive and Quantitative Analytical Performance is Translational for Clinical Utility of Cell-Free Tumor DNA Diagnostics 4That's Nice Announces Expanded Offering For Strategic Content And Public Relations 2That's Nice Announces Expanded Offering For Strategic Content And Public Relations 3The University of Kansas Medical Center and The University of Kansas Cancer Center Select iLab Solutions Web-based Software to Streamline Operations 2The University of Kansas Medical Center and The University of Kansas Cancer Center Select iLab Solutions Web-based Software to Streamline Operations 3PosturePulse, A Biofeedback Posture-Improving Belt, Improves Posture While Sitting or Standing 2
Cached News: