The beaches of Brazil beckon — but travelers need to find out if they're heading to a part of the country where a yellow fever vaccine is recommended.
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This red blood cell is swollen by the malaria parasite. In this image from a transmission electron micrograph, the blood cell has been colored red and the single-cell malaria parasite has been colored green.
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The prehensile tailed skink from the highlands of New Papua New Guinea has green blood due to high concentrations of the green bile pigment biliverdin. The green bile pigment in the blood overwhelms the intense crimson color of red blood cells resulting in a striking lime-green coloration of the muscles, bones, and mucosal tissues.
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A mosquito's antenna responds to odors. Scientists are trying to figure out how the malaria parasite might trigger a change in body odor that draws in mosquitoes that carry the disease, like the Anopheles skeeter pictured above.
An Anopheles mosquito — the only kind that can spread malaria — feeds on a human. On Monday, a 4-year-old girl died of the disease in Italy, where malaria was thought to have been eradicated.
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From left: Emmanuel Kwame lost his sight to river blindness as a young man in Ghana; a bed net keeps mosquitoes away from a mother and child in a Somalian hospital; extracting a guinea worm from an infected person.
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By hanging a caged chicken near mosquito traps in bedrooms in three Ethiopian villages, researchers hoped to learn how the insects react to the scent of a fowl.
Kassahun Jaleta/Courtesy of Rickard Ignell
A common house mosquito (Culex pipiens) is about to sink her six-weaponed proboscis into a human arm. This type transmits West Nile virus by biting infected birds, then biting humans.
In the 1940s, planes demonstrate DDT spraying at Congressional Airport, outside of Washington, D.C. They were part of a fleet headed to Greece to target mosquito breeding areas.
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