The Bonoa are a species of creatures native to the Colonies who produce edible eggs.
Their eggs are used in creating South Caprican noodles. When the culinary dish is served traditionally, the egg is usually placed with the noodles raw. As such, the Bonoa parasite inside the eggs is not killed, but is introduced into the blood stream of those who eat the dish.
Once considered a parasite by the Colonial Academy of Sciences, Lieutenant Felix Gaeta discovers that the parasite acts more as a symbiont that kills the Returner virus in the blood. However, the introduction of the parasite can only be done as a form of inoculation, and not as a cure. Furthermore, the parasite can be transmitted via bodily fluids, such as saliva (Battlestar Galactica 4).