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:3/22/2016)... PROVO and SANDY, Utah ... (NSO), which operates the highest sample volume laboratory in ... Tute Genomics and UNIConnect, leaders in clinical sequencing informatics ... the launch of a project to establish the informatics ... NSO has been contracted by the ...
(Date:3/18/2016)... 18, 2016 --> ... ICT, Manned & Unmanned Vehicles, Physical infrastructure and Perimeter Surveillance ... in the border security market and the continuing migration crisis ... Europe has led visiongain to publish this ... --> defence & security companies in the ...
(Date:3/15/2016)... ALBANY, New York , March 15, 2016 ... a new market report published by Transparency Market Research "Digital ... Growth, Trends and Forecast 2015 - 2023," the global digital ... at US$ 731.9 Mn in 2014 and is forecast to ... to 2023. Growth of micro, small and medium enterprises (MSMEs) ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... ... May 25, 2016 , ... Founder of ... board-certified in surgery and surgery of the hand by the National Board of ... to going above and beyond in his pursuit of providing the most comprehensive, ...
(Date:5/25/2016)... ... May 25, 2016 , ... WEDI, the nation’s leading authority on ... that Charles W. Stellar has been named by the WEDI Board of Directors as ... As an executive leader with more than 35 years of experience in healthcare, association ...
(Date:5/24/2016)... ... May 24, 2016 , ... ... traumatic injuries, will be accelerated by research at Worcester Polytechnic Institute (WPI) that ... wound healing and tissue regeneration. , The novel method, developed by WPI faculty ...
(Date:5/24/2016)... Maryland (PRWEB) , ... May 24, 2016 , ... ... of a newly re-branded identity. The new Media Cybernetics corporate branding reflects a ... world of imaging and image analysis. The re-branding components include a crisp, refreshed ...
Breaking Biology Technology:
Cached News: