Porrocaecum depressum is a species of nematode that parasitizes the small intestine of birds of prey. Adult female worms reach a body length between 30 mm and 120 mm, while male worms are slightly smaller, reaching a body length between 28 mm and 96 mm (Morgan & Schiller, 1950). The parasite’s eggs are expelled through the host’s feces. Crustaceans serve as intermediate hosts, where the larvae develop. For instance, fish can act as paratenic hosts, also known as transport hosts, by consuming infected crustaceans and thus harboring a multitude of Porrocaecum depressum individuals. The infected fish, in turn, are preyed upon by the definitive host, a bird of prey, allowing the parasite to reach its adult stage of development (Fagerholm & Overstreet, 2009).

Human Pathogenicity: There are no known cases of human infestation with the nematode species Porrocaecum depressum.