Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Infection in malaria-transmitting mosquito discovered

06.06.2014

Finding could lead to new strategies for malaria control

Researchers have found the first evidence of an intercellular bacterial infection in natural populations of two species of Anopheles mosquitoes, the major vectors of malaria in Africa. The infection, called Wolbachia, has been shown in labs to reduce the incidence of pathogen infections in mosquitoes and has the potential to be used in controlling malaria-transmitting mosquito populations.

"Wolbachia is an interesting bacterium that seems perfectly suited for mosquito control. However, there were strong doubts that it could ever be used against field Anopheles populations," said Flaminia Catteruccia, associate professor of immunology and infectious diseases at Harvard School of Public Health (HSPH) and at the University of Perugia, Italy. "We were thrilled when we identified infections in natural mosquito populations, as we knew this finding could generate novel opportunities for stopping the spread of malaria."

The study appears online June 6, 2014 in Nature Communications. Anopheles mosquitoes are the deadliest animal on the planet. They are responsible for transmitting malaria, which causes more than 600,000 deaths each year and puts half of the world's population at risk for diseases. Wolbachia infections spread rapidly through wild insect populations by inducing a reproductive phenomenon called cytoplasm incompatibility (CI), and 66% of arthropod species are infected. However, it was commonly thought that Anopheles mosquitoes were not natural hosts for Wolbachia infections, and attempts to identify infections in these mosquitoes in the field had failed.

Co-author Francesco Baldini, from University of Perugia, Italy and HSPH, in collaboration with researchers from CNRS, France, collected Anopheles mosquitoes from villages in Burkina Faso, West Africa, and analyzed their reproductive tracts. Their objective was to identify all the bacteria in the reproductive systems of both male and female mosquitoes; they were not looking directly for Wolbachia. To their surprise, they found a novel strain of the infection, which they named wAnga.

The researchers say they can now investigate whether the wAnga strain shares properties with other Wolbachia strains, which could make control strategies possible by inducing CI and reducing Plasmodium (the parasite that causes malaria) numbers in Anopheles mosquitoes in the field. "If successful, exploiting Wolbachia infections in malaria mosquitoes could reduce the burden of the disease globally," said co-author Elena Levashina, from the Max Planck Institute for Infection Biology, Berlin.

###

Other main authors of the study included Nicola Segata from the University of Trento, Italy, and Julien Pompon from CNRS, France.

This work was funded by a European Research Council FP7 ERC Starting Grant project 'Anorep' (grant ID: 260897), a Biotechnology and Biological Sciences Research Council grant (grant BB/I002898/1) and a Wellcome Trust grant (grant ID: 093553) to F.C., by the European Union FP7 grant (PCIG13-618833) and startup funding at the Centre for Integrative Biology (University of Trento) to N.S., by the EC FP7 Networks of Excellence EVIMalaR (242095) to E.A.L. and F.C., and by an ANR-11-BSV7-009-01 GIME to E.A.L. F.C. was supported by an NIH grant (grant ID: NIH 1R01AI104956-01A1). J.P. was supported by fellowships from FRM and the Fondation Des Treilles.

"Evidence of natural Wolbachia infections in field populations of Anopheles gambiae," Francesco Baldini, Nicola Segata, Julien Pompon, Perrine Marcenac, W. Robert Shaw, Roch K. Dabiré, Abdoulaye Diabaté, Elena A. Levashina, Flaminia Catteruccia, Nature Communications, DOI: 10.1038/ncomms4985, online June 6, 2014.

Harvard School of Public Health brings together dedicated experts from many disciplines to educate new generations of global health leaders and produce powerful ideas that improve the lives and health of people everywhere. As a community of leading scientists, educators, and students, we work together to take innovative ideas from the laboratory to people's lives—not only making scientific breakthroughs, but also working to change individual behaviors, public policies, and health care practices. Each year, more than 400 faculty members at HSPH teach 1,000-plus full-time students from around the world and train thousands more through online and executive education courses. Founded in 1913 as the Harvard-MIT School of Health Officers, the School is recognized as America's oldest professional training program in public health.

HSPH on Twitter: http://twitter.com/HarvardHSPH

HSPH on Facebook: http://www.facebook.com/harvardpublichealth

HSPH on You Tube: http://www.youtube.com/user/HarvardPublicHealth

HSPH home page: http://www.hsph.harvard.edu

Todd Datz | Eurek Alert!

Further reports about: Anopheles HSPH Harvard Infection infections mosquito populations reproductive

More articles from Health and Medicine:

nachricht Real-time imaging of lung lesions during surgery helps localize tumors and improve precision
30.07.2015 | American Association for Thoracic Surgery

nachricht Experimental MERS vaccine shows promise in animal studies
29.07.2015 | NIH/National Institute of Allergy and Infectious Diseases

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Quantum Matter Stuck in Unrest

Using ultracold atoms trapped in light crystals, scientists from the MPQ, LMU, and the Weizmann Institute observe a novel state of matter that never thermalizes.

What happens if one mixes cold and hot water? After some initial dynamics, one is left with lukewarm water—the system has thermalized to a new thermal...

Im Focus: On the crest of the wave: Electronics on a time scale shorter than a cycle of light

Physicists from Regensburg and Marburg, Germany have succeeded in taking a slow-motion movie of speeding electrons in a solid driven by a strong light wave. In the process, they have unraveled a novel quantum phenomenon, which will be reported in the forthcoming edition of Nature.

The advent of ever faster electronics featuring clock rates up to the multiple-gigahertz range has revolutionized our day-to-day life. Researchers and...

Im Focus: Superfast fluorescence sets new speed record

Plasmonic device has speed and efficiency to serve optical computers

Researchers have developed an ultrafast light-emitting device that can flip on and off 90 billion times a second and could form the basis of optical computing.

Im Focus: Unlocking the rice immune system

Joint BioEnergy Institute study identifies bacterial protein that is key to protecting rice against bacterial blight

A bacterial signal that when recognized by rice plants enables the plants to resist a devastating blight disease has been identified by a multi-national team...

Im Focus: Smarter window materials can control light and energy

Researchers in the Cockrell School of Engineering at The University of Texas at Austin are one step closer to delivering smart windows with a new level of energy efficiency, engineering materials that allow windows to reveal light without transferring heat and, conversely, to block light while allowing heat transmission, as described in two new research papers.

By allowing indoor occupants to more precisely control the energy and sunlight passing through a window, the new materials could significantly reduce costs for...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

3rd Euro Bio-inspired - International Conference and Exhibition on Bio-inspired Materials

23.07.2015 | Event News

Clash of Realities – International Conference on the Art, Technology and Theory of Digital Games

10.07.2015 | Event News

World Conference on Regenerative Medicine in Leipzig: Last chance to submit abstracts until 2 July

25.06.2015 | Event News

 
Latest News

Tool making and additive technology exhibition: Fraunhofer IPT at Formnext

31.07.2015 | Trade Fair News

First Siemens-built Thameslink train arrives in London

31.07.2015 | Transportation and Logistics

California 'rain debt' equal to average full year of precipitation

31.07.2015 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>