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Haematopinus suis
''Haematopinus suis'', the hog louse, is one of the largest members of the louse suborder Anoplura, which consists of sucking lice that commonly afflict a number of mammals. ''H. suis'' is found almost solely on the skin surface of swine, and take several blood meals a day from their hosts.〔Wooton-Saadi, , Towell-Vail, Williams, Gaafar. 1987. Incidence of Sarcoptes scabiei and Haematopinus suis on swine in Indiana. Journal of Economic Entomology, 80 (5): 1031-1034〕 The lice have large claws that enable them to grasp a hog's hair and move around its body. It is easily seen without magnification, being long. ''H. suis'' has a long, narrow head and long mouthparts adapted for sucking blood. It is the only louse found on swine.〔(Universidade de São Paulo: Instituto de Ciências Biomédicas )〕 Louse infestation is relatively rare in the US, but a 2004 study found that about 14% of German swine farms had ''H. suis'' infestations.〔(Swine Ectoparasites: Hog Louse, Pork Information Gateway )〕 Due to the frequency of feeding, infected swine become severely irritated, often rubbing themselves to the point of injuring their skin and displacing body hair. Particularly afflicted hogs may become almost completely bald and, in young hogs, can arrest growth, a cause of concern for farmers.〔(Florida State University: Molecular Expressions: Hog Louse )〕
== Adult Morphology ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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