Do geese cause the condition called “swimmers itch”?
No. Canada geese are not responsible for the condition known as “swimmer’s itch.” “Swimmer’s itch” is caused by a waterborne parasite. While this parasite does spend part of its life-cycle in an intermediate host (which can include a large variety of warm blooded animals, including birds), the critical and primary host is a snail. If the parasite is present in a body of water it can not be controlled by addressing potential intermediate host species.
