title: Influenza A virus subtype H7N1
text: H7N1 is a subtype of the species Influenza A virus (sometimes called bird flu virus).
  
  H7N1 was first isolated in 1972, from Eurasian siskin.
  
  A highly pathogenic strain of it caused a flu outbreak with significant spread to numerous farms, resulting in great economic losses in 1999 in Italy in turkeys.
  
  References
  
  H7N1