Changes

  !width="92%"|<center><u>'''Clinical Signs'''</u></center>  

  !width="92%"|<center><u>'''Clinical Signs'''</u></center>  

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  |-

  |<center>'''Class 1'''</center>   

  |<center>'''Class I'''</center>   

  |'''Asymptomatic or mild disease'''  

  |'''Asymptomatic or mild disease'''  

*Weight loss, reduced exercise tolerance or an occasional cough may be seen.  

*Weight loss, reduced exercise tolerance or an occasional cough may be seen.  

*No radiographic signs or laboratory abnormalities.

*No radiographic signs or laboratory abnormalities.

  |-

  |-

  |<center>'''Class 2'''</center>  

  |<center>'''Class II'''</center>  

  |'''Moderate disease'''

  |'''Moderate disease'''

*Animal coughs occasionally and shows mild-to-moderate exercise intolerance.  

*Animal coughs occasionally and shows mild-to-moderate exercise intolerance.  

*Anaemia and proteinuria may be present.  

*Anaemia and proteinuria may be present.  

  |-

  |-

  |<center>'''Class 3'''</center>  

  |<center>'''Class III'''center>  

  |'''Severe disease'''

  |'''Severe disease'''

*Signs are variable but may include weight loss, exercise intolerance, tachypnoea, dyspnoea, severe/persistent coughing, haemoptysis, syncope, or ascites.

*Signs are variable but may include weight loss, exercise intolerance, tachypnoea, dyspnoea, severe/persistent coughing, haemoptysis, syncope, or ascites.

*Anaemia, thrombocytopenia, and proteinuria are seen.

*Anaemia, thrombocytopenia, and proteinuria are seen.

  |-

  |-

  |<center>'''Class 4'''</center>  

  |<center>'''Class IV'''</center>  

  |'''Caval syndrome'''

  |'''Caval syndrome'''

*Sudden onset of collapse, haemoglobinuria, and respiratory distress.  

*Sudden onset of collapse, haemoglobinuria, and respiratory distress.