Anyone familar with the Nietzsche quote

[Mikey]

that goes something like, "The surface of planet Earth has a disease, and this disease is called humanity"?

Which work is it from, multiple translations into English from the German welcomed,

Thanks!

[Neanderthal]

The earth, has a skin; and this skin has diseases. One of these diseases, for example, is called "Mankind”. (Thus Spoke Zarathustra.)