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Another example is the cockoo bird which leaves its young with a host to raise. This type of parasitism is often called brood parasitism. Terry Spivey, USDA Forest Service, www.forestryimages.org
Trichinella spiralis is a common parasite of carnivorous and omnivorous mammals, including humans. There are three different ecological types of life cycles, the urban cycle, the sylvatic cycle, and the marine cycle. In the urban cycle, rats and pigs serve as hosts and reservoirs of the parasite.