by Brooks Hays
Washington (UPI) Dec 1, 2017
Mosquitoes are more likely to transmit dengue virus on warmer days, according to new research published Friday in the journal Frontiers in Microbiology.
The findings suggest health officials should consider weather forecasts when working to prevent and respond to outbreaks of the mosquito-borne disease.
"If the outdoor temperature is high for a sustained period, dengue prevention strategies should be a priority," Xiao-Guang Chen, a scientist at the Southern Medical University in Guangzhou, China, said in a news release.
In the summer of 2014, Guangzhou experienced a significant outbreak of dengue fever. The outbreak coincided with several months of hot weather, with an average high of 86 degrees Fahrenheit.
Scientists suspected the weather might have something to do with the outbreak. They tested their hypothesis by infecting a group of mosquitoes with dengue virus in the lab and subjecting them to various temperatures.
Researchers measured how much the virus replicated and colonized parts of the mosquitoes' bodies. Inside mosquitoes living in hotter incubators, the virus replicated more rapidly and spread throughout their bodies.
Higher levels of the virus under hotter temperatures likely translate to a greater likelihood of transmission to humans.
Surprisingly, mosquitoes exposed to fluctuating temperatures feature low levels of the virus in their salivary glands, suggesting even slightly breaks in periods of hot weather could be enough to curb dengue outbreaks.
The virus replicated most slowly inside mosquitoes exposed to cool temperatures, which may explain why dengue fever is rare in cooler climes.
Moscow (AFP) Nov 30, 2017
Fewer than half of Russians with HIV are taking antiretroviral drugs, in part because of a conspiracy theory that the AIDS-causing virus is a myth invented by the West, officials and activists say. While AIDS-related deaths and new HIV infections are falling across the globe, in Eastern Europe and Central Asia statistics grow more alarming by the year. According to official figures, 80 ... read more
Epidemics on Earth - Bird Flu, HIV/AIDS, Ebola
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement|