Borrelia anserina

Borrelia anserina is a spirochete, highly motile, Gram-negative helical bacterium that is responsible for causing avian spirochetosis, an acute, endemic disease of birds in tropical and subtropical regions.

Transmission: B. anserina is primarily spread by Argas ticks (fowl ticks) and other biting arthropods (mosquitoes, mites). Direct transmission via the faeco-oral route also occurs.



  • Order: Spirochaetales
  • Family: Spirochaetaceae
  • Genus: Borrelia


  • chickens
  • turkeys
  • pheasants
  • geese
  • ducks

Associated Diseases