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RNA Viruses (Pathogenesis (Clinical Manifestations (Subclinical infection…

- - - - replicate in gut
      - ssRNA virus with icosahedral symmetry
      - Stable in acid pH
      - positive sense genome
      - 71 serotypes divided into 5 groups
        
        Poliovirus
        
        3 serotypes
        
        Serotype 1 – Brunhilda
        Serotype II – Lansing
        Serotype III- Leon
        
        Properties:red_flag:
        
        nonenveloped
        
        ssRNA genome
        
        Distribution :red_flag:
        
        Human as hosts
        
        Coxsackieviruses group A
        
        23 serotypes
        
        Coxsackieviruses group B
        
        6 serotypes
        
        Enterovirus
        
        38 serotypes
        
        Human 68-71
        Simian 1-18
        Porcine 1-11
        Bovine 1-2
        
        Echovirus
        
        31 serotypes
      - Capsid has 60 copies each of 4 proteins, VP1, VP2, VP3 and VP4
    - - Respiratory viruses
    - - Hepatitis virus A
    - - Equine rhinitis A virus
      - FMDV
    - - Equine rhinitis B virus (ERBV):serotypes ERBV-1 and ERBV-2