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<div about="/news-events/nih-research-matters/universal-mosquito-vaccine-tested" typeof="sioc:Item foaf:Document" class="ds-1col node node--nih-research-matters view-mode-full node--full node--nih-research-matters--full clearfix">
<p class="publishdate"><span property="dc:date" datatype="xsd:dateTime" content="2020-06-23T00:00:00-04:00" class="date-display-single">June 23, 2020</span></p><div class='syndicate'><h1>Universal mosquito vaccine tested </h1><div class="callout callout-with-border"><h3>At a Glance</h3>
<ul>
<li>A small trial showed that a vaccine designed to provide broad protection against mosquito-borne diseases is safe and causes a strong immune response in healthy volunteers.</li>
<li>More studies are needed to test its effectiveness against specific diseases.</li>
</ul></div><div class="media-float-right"><div class="ds-1col file file-image file-image-jpeg view-mode-floated_media clearfix">
<picture title="Anopheles gambiae mosquito on human skin">
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<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-medium/public/news-events/research-matters/2020/20200622-mosquito.jpg?itok=q-DFdmL3&amp;timestamp=1592837717 1x" media="screen and (min-width: 800px)" />
<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-medium-small/public/news-events/research-matters/2020/20200622-mosquito.jpg?itok=nyxSrOtX&amp;timestamp=1592837717 1x" media="screen and (min-width: 600px)" />
<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-small/public/news-events/research-matters/2020/20200622-mosquito.jpg?itok=Q8g6Pmn-&amp;timestamp=1592837717 1x" media="screen and (min-width: 480px)" />
<source srcset="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-tiny/public/news-events/research-matters/2020/20200622-mosquito.jpg?itok=aXjF50NR&amp;timestamp=1592837717 1x" media="screen and (min-width: 0)" />
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<img src="https://www.nih.gov/sites/default/files/styles/floated_media_breakpoint-medium/public/news-events/research-matters/2020/20200622-mosquito.jpg?itok=q-DFdmL3&amp;timestamp=1592837717" alt="Anopheles gambiae mosquito on human skin" title="Anopheles gambiae mosquito on human skin" />
</picture><span class="caption">Researchers tested a vaccine against mosquito saliva that they hope will help protect people against diseases transmitted by mosquitos. </span><span class="credit">CDC / Jim Gathany</span></div>
</div><p>Most mosquito bites are harmless. But some mosquitoes carry pathogens, like bacteria and viruses, that can be deadly. Mosquito-related illnesses kill hundreds of thousands of people worldwide each year.</p>
<p>When a mosquito bites you, compounds in its saliva interact with your bodys initial immune response to help pathogens evade your bodys disease defenses. Studies have shown that animals that have antibodies to mosquito saliva proteins have some protection against mosquito-borne diseases. Although there are vaccines being studied for individual mosquito-borne diseases—like malaria, West Nile virus, and dengue fever—a vaccine against mosquito saliva could provide broader protection against many diseases.</p>
<p>To investigate, a research team led by Drs. Jessica Manning and Matthew Memoli at NIHs National Institute of Allergy and Infectious Diseases (NIAID) tested a “universal mosquito vaccine” known as AGS-v. It contains four synthetic peptides that are found in the salivary gland proteins of different mosquito species. The work was funded by NIAID along with NIHs Office of the Director (OD) and National Cancer Institute (NCI). Results were published on June 11, 2020 in the<em> Lancet.</em></p>
<p>Forty-nine healthy volunteers were randomly assigned to one of three groups. One group received injections of an inactive placebo (sterile water); one received injections of the vaccine; and one received injections of the vaccine combined with an adjuvant, a compound designed to enhance immune responses. They were given two injections 21 days apart.</p>
<p>On the 42nd day of the study, volunteers underwent a “feeding session” with disease-free mosquitoes bred at the NIH. The mosquitoes fed briefly from volunteers arms through a fine mesh while in a container resembling a cup.</p>
<p>The volunteers were monitored for twelve months after the first vaccination. None had serious adverse reactions to the vaccine or mosquito feeding. The mosquitoes were also monitored after the feeding session to see whether the vaccine had any impact on their survival or number of offspring they produced.</p>
<p>The volunteers blood tests showed that those who received the vaccine with adjuvant produced specific antibodies to the peptides. One of the volunteers developed a significant rash after the first dose of the vaccine, but no larger safety concerns were identified. The mosquitoes didnt seem to be affected after feeding on people whod been vaccinated.</p>
<p>“A widely available universal vaccine could possibly provide protection against emerging and re-emerging mosquito-borne diseases as they arise, allowing public health officials to quickly respond to new outbreaks and epidemics without waiting for new treatments or vaccines to be developed,” Manning says.</p>
<p>More research is needed to test whether the vaccine would work against individual pathogens and with exposure to mosquitoes in a natural environment.</p></div><h2 class="label-above">Related Links</h2><ul class="spaced print-urls"><li><a href="https://www.nih.gov/news-events/nih-research-matters/engineering-malaria-resistance-mosquitoes" target="_top">Engineering Malaria Resistance in Mosquitoes</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/progress-malaria-vaccines" target="_top">Progress on Malaria Vaccines</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/experimental-malaria-vaccine-protects-adults-more-year" target="_top">Experimental Malaria Vaccine Protects Adults for More Than a Year</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/malaria-vaccine-found-safe-protective" target="_top">Malaria Vaccine Found Safe and Protective</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/experimental-vaccine-protects-against-dengue-virus" target="_top">Experimental Vaccine Protects Against Dengue Virus</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/how-dengue-virus-infects-cells" target="_top">How Dengue Virus Infects Cells</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/dna-vaccines-protect-monkeys-against-zika-virus" target="_top">DNA Vaccines Protect Monkeys Against Zika Virus</a></li><li><a href="https://newsinhealth.nih.gov/2016/04/block-buzzing-bites-bumps" target="_top">Block the Buzzing, Bites, and Bumps: Preventing Mosquito-Borne Illnesses</a></li><li><a href="https://newsinhealth.nih.gov/2019/02/zika" target="_top">From A to Zika: Understanding Emerging Diseases</a></li><li><a href="https://www.niaid.nih.gov/diseases-conditions/west-nile-virus" target="_top">West Nile Virus</a></li><li><a href="https://www.niaid.nih.gov/diseases-conditions/dengue-fever" target="_top">Dengue Fever</a></li><li><a href="https://www.niaid.nih.gov/diseases-conditions/malaria" target="_top">Malaria </a></li><li><a href="https://rarediseases.info.nih.gov/diseases/12894/zika-virus-infection" target="_top">Zika Virus Infection</a></li><li><a href="https://www.fic.nih.gov/ResearchTopics/Pages/infectiousdiseases-zika-virus.aspx" target="_top">Zika Virus Information and Resources</a></li></ul><p class="footnote"><strong class="label-inline">References:&nbsp;</strong><a href="https://pubmed.ncbi.nlm.nih.gov/32534628/">Safety and immunogenicity of a mosquito saliva peptide-based vaccine: a randomised, placebo-controlled, double-blind, phase 1 trial.</a> Manning JE, Oliveira F, Coutinho-Abreu IV, Herbert S, Meneses C, Kamhawi S, Baus HA, Han A, Czajkowski L, Rosas LA, Cervantes-Medina A, Athota R, Reed S, Mateja A, Hunsberger S, James E, Pleguezuelos O, Stoloff G, Valenzuela JG, Memoli MJ. <em>Lancet</em>. 2020 Jun 11:S0140-6736(20)31048-5. doi: 10.1016/S0140-6736(20)31048-5. Online ahead of print. PMID: 32534628.</p><p class="footnote"><strong class="label-inline">Funding:&nbsp;</strong>NIHs National Institute of Allergy and Infectious Diseases (NIAID), Office of the Director (OD), and National Cancer Institute (NCI).</p>
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