The jars of larvae in stagnant water and thick clouds of mosquitoes at a Colombian lab may seem like the stuff of nightmares. They are in fact crucial to a project to fight the spread of dengue fever. The jars of larvae in stagnant water and thick clouds of mosquitoes at a Colombian lab may seem like the stuff of nightmares. They are in fact crucial to a project to fight the spread of dengue fever. Ecology Phys.org – latest science and technology news stories