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The chicken (Gallus domesticus) is a large and round short-winged bird, domesticated from the red junglefowl of Southeast Asia around 8,000 years ago. Most chickens are raised for food, providing meat and eggs ; others are kept as pets [ 1 ] or for cockfighting .
Blood from a chicken infected with a male gametocyte (left) and a female gametocyte (right). Parasites in the genus Leucocytozoon have a life cycle that involves both a bird host, and a black fly (with the exception of Leucocytozoon caulleryi which cycles between a bird host and a biting midge). [1]
Argas persicus, also known as fowl tick or poultry tick, is a small soft-bodied tick that is found primarily on domestic fowl such as chickens, ducks, and geese. It was first recorded by Lorenz Oken in 1818 in Mianeh, Persia, [1] [2] and named Rhynochoprion persicum.
Eimeria tenella has a monogenetic life cycle, that is, the life cycle involves a single host. [2] Various stages of its complicated life cycle may conveniently be described under two phases, asexual cycle or schizogony and sexual cycle involving gametogony. Much of life cycle is intracellular.
At some point thousands of years ago, ancient chicken breeders chose two tame jungle fowl (gallus gallus) and the resulting union produced the egg of the world’s first genetically distinct ...
A complete life cycle requires 2–4 weeks. One defining feature of the species during developmental stage is the occurrence of a single egg in each egg capsule. The development of an egg embryo to a mature cysticercoid in its intermediate host requires 28 days after infection, but fully mature cysticercoid takes about 31–34 days.
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Six commercial chicken eggs — view from the top against a white background An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote ) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the animal hatches.