Davainea proglottina is a type of tapeworm, specifically known as a cestode that is an internal parasite of chickens. D. proglottina is one of the more harmful species of tapeworms in young chicks. It is a 4 mm (0.15 in) long flattened, segmented, ribbon-shaped worm that invades the chicken's gastrointestinal system.
D. proglottina has an indirect life cycle, using slugs and snails as intermediate hosts. More than 1500 cysticercoids have been found inside the digestive tract of infected slugs, remaining infective for more than 11 months and have a lifespan of 3 years. Chickens become infected by consuming the D. proglottina eggs shed in the feces of infected slugs and snails.