|
Heterakis Gallinarum
''Heterakis gallinarum'' is a nematode parasite that lives in the cecum of some Galliformes, galliform birds, particularly in ground feeders such as domestic chickens and domesticated turkey, turkeys. It causes infection that is mildly pathogenic. However, it often carries a protozoan parasite ''Histomonas meleagridis'' which causes of histomoniasis (blackhead disease). Transmission of ''H. meleagridis'' is through the ''H. gallinarum'' egg. ''H. gallinarum'' is about 1–2 cm in length with a sharply pointed tail and a preanal sucker. The parasite is a diecious species with marked sexual dimorphism. Males are smaller and shorter, measuring around 9 mm in length, with a unique bent tail. Females are stouter and longer, measuring roughly 13 mm in length, with a straight tail end.Permin A & Hansen JW (1998)''The Epidemiology, Diagnosis and Control of Poultry Parasites'' Food and Agriculture Organization of the United Nations, Rome, Italy, pp. 29–30. Lifecycle ''H. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
