A cecal carcinoid tumor is a carcinoid tumor of the cecum. The anterior portion of adult worms may be observable breaching the cecal and colonic mucosa. The bacteria also colonized the cecal and colonic mucosae of mice. Necrosis is initiated by inflammation and gradual ulceration, causing thickening of the cecal wall. In a cecal volvulus, often part of the bowel needs to be surgically removed. Sigmoid and cecal volvulus typically occurs between the ages of 30 and 70. It is one of two types of cecal volvulus, the other being axial ileocolic. The posterior cecal artery (or posterior caecal artery) is a branch of the ileocolic artery. The infection may prolong in the cecal tonsils. This pathogen causes cecal coccidiosis in chickens. It is transmitted by another cecal parasite, the nematode "Heterakis gallinarum". The Southern African Vlei Rat is a cecal digester and strict herbivore. The cause of cecal impactions are not known. Eimeria tenella is a species of "Eimeria" that causes hemorrhagic cecal coccidiosis in young poultry. Because they are cecal digesters, they are able to exploit low quality forage.