The chikunguyna virus was discovered in 1955 by two scientists in Tanzania.
EMDataBank using UCSF Chimera
December 13, 2013 After being a problem in Africa and southern Asia for decades, chikungunya has made its way to the Caribbean. The mosquito-borne illness attacks the joints, causes fever, headaches and arthritis symptoms. There are no vaccines and treatments for the virus.
Mosquitoes like thisÂ Aedes aegypti female can spread dengue fever.
October 17, 2013 It turns out that the mosquito-borne illness has been hanging around Houston longer than thought. A look at blood and spinal fluid samples collected from patients a decade ago found that quite a few of them had been sick with undiagnosed dengue fever.
Inspector Mohammad Saleem Taqi takes a photo of sanitation workers as they clear out debris in sewers. The government feeds the photos into a map to track the city's effort to stop dengue fever.
September 16, 2013 Two years ago Pakistan's Punjab province was hit with one of the world's worst dengue outbreaks. This year the number of recorded cases has plummeted. Many leaders credit a mobile phone app that tracks mosquito populations and city workers' efforts to contain them.
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In 2010, Florida health officials looked for mosquito larvae in vehicle tires where water had collected. As many as 15 cases have been found in Stuart this year.
Joe Raedle/Getty Images
September 12, 2013 After decades without any reported cases, dengue fever seems to be getting a foothold in the U.S. In 2009, it surfaced in Key West. This year, 18 cases have been reported this summer in Martin County, Fla.
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Dengue fever cases have cropped up in southern Florida.
August 26, 2013 Dengue fever was commonplace in Florida until the 1930s. Air conditioning, window screens and better mosquito control helped break the dengue cycle. Now the mosquito-borne illness is back.
Dengue fever patients are treated in a hospital in Asuncion, Paraguay, in January.
Norberto Duarte/AFP/Getty Images
April 8, 2013 There could be as many as 400 million dengue infections worldwide each year, making it more common than malaria, according to a new study. One reason for the huge increase in estimated infections is that dengue has been spreading far and wide to regions outside the tropics.
If you catch dengue fever in the Western Hemisphere, it most likely came from the Aedes aegypti mosquito.
Muhammad Mahdi Karim /Wikimedia.org
March 13, 2013 Decades after its eradication, the "breakbone fever" has become endemic again in the Florida Keys. Scientists say that Floridians infected during a recent outbreak didn't catch the virus abroad but rather got a dengue strain that's unique to Key West.
A health worker in the Domincan Republic sprays insecticide between houses to stop dengue fever outbreaks this month.
Erika Santelices/AFP/Getty Images
September 10, 2012 In a study with about 4,000 Thai schoolchildren, a vaccine for dengue fever works well against some strains of the dengue virus. But the overall level of protection was lower than hoped for. The results suggest that a vaccine for dengue fever can be developed eventually.
January 27, 2012 Dengue fever cases are soaring worldwide, according to the World Health Organization. They're also hitting closer to home. Two locally acquired cases were reported in Miami last year, and public health experts say we should expect more.
Researchers hope to keep the mosquito that transmits dengue, Aedes aegypti, from infecting humans using the Wolbachia bacterium.
James Gathany/CDC Public Health Image Library
August 25, 2011 Scientists infected hundreds of thousands of mosquitoes with a mild strain of a bacterium. They believe that once mosquitoes are sick from the infection, they can't spread the dengue virus to humans.
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