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:7/24/2014)... 45% on average over a 35 year period in ... the impact of humans on declining animal numbers. This ... as insects, spiders, crustaceans, slugs and worms bring to ... crops, decomposition for nutrient cycling, water filtration and human ... and led by UCL, Stanford and UCSB, focused on ...
(Date:7/24/2014)... study has identified two factors that characterize sustainable ... production of highly qualified physics teachers. Specifically, one ... physics teacher education in combination with institutional motivation ... viable. Science, Technology, Engineering and Math (STEM) teacher ... study points the way for institutions seeking to ...
(Date:7/24/2014)... current biodiversity, the product of 3.5 billion years of ... history of life. But it may be reaching a ... literature and analysis of data published in Science ... loss and decline of animals is contributing to what ... sixth mass biological extinction event. , Since 1500, more ...
Breaking Biology News(10 mins):Invertebrate numbers nearly halve as human population doubles 2Invertebrate numbers nearly halve as human population doubles 3Creating sustainable STEM teacher preparation programs 2Stanford biologist warns of early stages of Earth's 6th mass extinction event 2Stanford biologist warns of early stages of Earth's 6th mass extinction event 3
(Date:7/25/2014)... The Conferee Networking committee is pleased to announce ... two-hour sessions provide a unique networking opportunity for attendees ... new techniques, or brainstorm new ideas in an informal ... consideration is August 31, 2014, and instructions can be ... will review the topics, and status notifications will be ...
(Date:7/25/2014)... IN (PRWEB) July 25, 2014 At ... (FAA) has granted a 60-day extension for the public ... the Special Rule for Model Aircraft established by Congress ... of 2012. The 60-day extension establishes the new deadline ... United States Department of Transportation/FAA notice published in the ...
(Date:7/24/2014)... July 24, 2014 Gain recognition ... Supply Chain of the biotech industry. Nominations are ... Awards, brought to you by the Bio ... of supply chain management professionals for the past ... stakeholders of the Biotech industry – Manufacturers, Service ...
(Date:7/24/2014)... Security forces worldwide rely on sophisticated equipment, trained ... other public areas against terrorist attacks. A revolutionary ... about to make their job much easier. , ... Patolsky of Tel Aviv University ,s School of ... developed by the Herzliya company Tracense, picks up ...
Breaking Biology Technology:Pittcon 2015 Announces Call for Topics for Conferee Networking Sessions 2FAA Grants Comment Extension at the Request of AMA 2Call for Submission: BSMA’s Supply Chain Management Innovation Awards 2Call for Submission: BSMA’s Supply Chain Management Innovation Awards 3Nano-sized chip 'sniffs out' explosives far better than trained dogs 2
Cached News: