In applying the cutaneous test for tuberculosis, the scarified surfaces, unless covered, are subjected to irritation and possible infection from without.
Protection usually is secured by the use of a soft, smooth dressing, as a linen or silk handkerchief, applied as a bandage directly over the wound. While this method serves very well in many instances, it is open to some objections. The cloth comes closely in contact with the excoriated surfaces and is liable to irritate, causing misleading inflammation; the dressing is difficult to keep in place, especially on the forearm (the part commonly selected); and the progress of the reaction can not be observed without removing the bandage.
I have found an ablong felt protector, like the one shown in the accompanying illustration, of considerable value. It is made on the same principle as the widely used vaccination pads, and the openings are covered with thin, transparent