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:


(Date:5/6/2017)... SINGAPORE , May 5, 2017 ... has just announced a new breakthrough in biometric ... that exploits quantum mechanical properties to perform ... new smart semiconductor material created by Ram Group ... across finance, entertainment, transportation, supply chains and security. ...
(Date:4/19/2017)... York , April 19, 2017 ... as its vendor landscape is marked by the presence ... market is however held by five major players - ... Together these companies accounted for nearly 61% of the ... the leading companies in the global military biometrics market ...
(Date:4/17/2017)... April 17, 2017 NXT-ID, Inc. (NASDAQ: ... the filing of its 2016 Annual Report on Form 10-K on ... ... is available in the Investor Relations section of the Company,s website ... SEC,s website at http://www.sec.gov . 2016 Year Highlights: ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... , ... May 23, 2017 , ... Vortex Biosciences ... “Label-free isolation of prostate circulating tumor cells using Vortex microfluidic technology ” in ... of a collaboration with Dr. Dino Di Carlo and Dr. Matthew Rettig at the ...
(Date:5/23/2017)... ... May 23, 2017 , ... Customers ... their control technology again and again. METTLER TOLEDO has released two new videos ... videos illustrate how integration of the ACT350 into Siemens and Allen Bradley PLCs ...
(Date:5/21/2017)... ... 20, 2017 , ... CNSDose is a genetically driven, clinically ... by finding the right antidepressant faster. CNSDose speeds recovery and reduces side ... personalized approach to treatment. , A peer-reviewed and published, 12-week double-blind ...
(Date:5/18/2017)... ... , ... Clinical Supplies Management (“CSM”), a Great Point Partners II (“GPP”) portfolio ... CSM has doubled in size over the past six months with the acquisition of ... Gasper joins CSM as Chief Financial Officer. Roger has over 25 years of ...
Breaking Biology Technology:
Cached News: