Wester applies a herbal solution to Jo Grant's arm. (TV: Planet of the Daleks)

You may be looking for Fungoid.

Fungoid infection was a disease spread by the fluid of the sponge-plant. Fungus grew on the area of contact and then began to spread across the body. Jo Grant became infected but Wester cured her with a herbal solution. (TV: Planet of the Daleks)

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