In the United States, the antiprotozoal drugs eflornithine, benznidazole, melarsoprol, nifurtimox, sodium stibogluconate, and suramin are available through the Centers for Disease Control and Prevention (CDC) Drug Service, Atlanta, GA 30333 (telephone 404-639-3670; drugservice@cdc.gov).
Deku is a small half-plant, wooden-looking creature that lives mostly in Lost Woods, Hyrule and Southern Swamp, Termina. Dekus can also be known as Scrubs. Dekus are the property of Nintendo and are known from the game series The Legend of Zelda that Shigeru Miyamoto has given spirit.
The planet with the survivors you're looking is named Oltan. Oltan is in the Phontes System which, in turn, is in the Silean Nebula. As for where Dekuuna is, it's the big planet right next door to Oltan. Once you scan Oltan and pick up the Elcor Flotilla, just head back to the Citadel Embassies and talk to the Elcor Ambassador again to finish the quest.