Recipe for curing swollen or suppurating wounds of oxen bitten by mice:


Columella, De Re Rustica 6.17.1-6:


There is a practice of encasing the shrew-mouse itself while still alive in potter’s clay and, when the clay is dry, hanging it around the ox’s neck. This renders the animal immune from the bite of a shrew-mouse. (Loeb trans.)



Instructions for using maggots to prevent toothache:


Pliny, Natural History XXVII.89:


Xenocrates calls gallidraga a prickly marsh plant like leucacanthus, with a tall stem like fennelgiant, on the top of which is perched an egg-shaped ball. In this, he says, as summer advances, are bred maggots, which are kept in a box and attached with bread, as an amulet, to the arm on the same side as an aching tooth, and the pain disappears at once in a wonderful manner. These maggots, he says, retain their potency for not more than a year, and then only if they have not touched the ground. (Loeb trans.)