Erradicating a parasite like the the guinea worm is a bit like erradicating Smallpox or Polio. The ecossystem impact that you would expect is a change in human

Erradicating a parasite like the the guinea worm is a bit like erradicating Smallpox or Polio. The ecossystem impact that you would expect is a change in human population due to the improved health. However, we consider it more ethical to control the size of the human population with voluntary birth control instead of terrible diseases :)