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==Classification==
 
==Classification==
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Canine adenovirus 1 (CAV1) is a member of the Adenoviridae family. The  Adenoviridae are a family of double-stranded DNA viruses which have an  icosahedral nucleocapsid and have been isolated from many mammals and birds. However, only a small number of Adenoviridae cause significant veterinary disease, one of these being canine adenovirus 1.
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CAV-1 is a member of the Adenoviridae family, a group double-stranded DNA viruses with an  icosahedral nucleocapsid. Many Adenoviridae have been isolated from mammals and birds, but only a small number of these cause significant veterinary disease. The family consists of four genera: Mastadenovirus, Aviadenovirus, Atadenovirus and Siadenovirus. Canine adenovirus 1 is a Mastadenovirus.
Classification
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This family originally  consisted of only two genera, Mastadenovirus, which infect mammals, and  Aviadenovirus, which infect birds. There are also several as yet  unassigned and recently assigned viruses in the family.
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Mastadenovirus
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This  genus consists of 20 virus species that infect mammals including  canine, equine, bovine, ovine and porcine adenoviruses. All 20 species  share a common antigen. Important diseases are infectious canine  hepatitis, canine adenovirus 2 infection, and equine adenovirus A  infection.
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Aviadenovirus
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This genus  includes the viruses of inclusion body hepatitis, quail  bronchitis,  marble spleen disease and a number of adenoviruses of  poultry and birds  that are not associated with significant diseases.  Members of the  genus share a common antigen.
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Previously Unassigned Adenoviruses
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Included  in this category are the viruses that have recently (2002) been placed  in the genera Atadenovirus and Siadenovirus. These viruses include the  egg drop syndrome virus (Atadenovirus), turkey hemorrhagic enteritis  (Siadenovirus), adenoviral splenomegaly of chickens (Atadenovirus) and  ovine adenovirus 287 (Atadenovirus; of research interest, but of no  disease significance) and some bovine adenovirus types 4 to 8  (Atadenovirus).
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MastadenovirusInfectious Canine HepatitisCause
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Canine adenovirus 1. The DNA sequence of this virus has been determined.
   
==Viral Characteristics==
 
==Viral Characteristics==
 
Non-enveloped, viruses with icosahedral symmetry containing a single, linear molecule of double-stranded DNA.
 
Non-enveloped, viruses with icosahedral symmetry containing a single, linear molecule of double-stranded DNA.
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