section_path: Human attitudes and interests/Planned extinction/Proposed/Disease agents
section_name: Disease agents
paragraph_text: Disease agents
  
  The poliovirus is now confined to small parts of the world due to extermination efforts.
  
  Dracunculus medinensis, or Guinea worm, a parasitic worm which causes the disease dracunculiasis, is now close to eradication thanks to efforts led by the Carter Center.
  
  Treponema pallidum pertenue, a bacterium which causes the disease yaws, is in the process of being eradicated.