| congenital tremor s. |
any of several similar congenital neurological diseases of pigs in which piglets have noticeable trembling, often owing to defective myelination of nerves. Mild varieties may clear up within a month but in severe cases the piglets cannot function normally and soon die. One variety is autosomal recessive; another is sex-linked; and others are caused by intrauterine viral infections such as with hog cholera virus. Affected pigs are called dancing or shaker pigs. Called also congenital trembles and myoclonia congenita.
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| congenital achromia |
Albinism.
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| congenital amaurosis |
Amaurosis present at birth.
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| congenital aural atresia |
Failure of the external ear canal to develop in utero. When this condition affects both ears, the child may suffer permanent hearing loss and have difficulty speaking and acquiring language skills. Unilateral cases requi
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| congenital cyanosis |
Cyanosis usually associated with stenosis of the pulmonary artery orifice, an imperforate ventricular septum, or a patent foramen ovale or ductus arteriosus. SEE: tetralogy of Fallot.
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