To the Editor.—
We thank Drs. Ayres and Mihan for their interest in our paper. It has not been our experience, however, that there are "two types of rosacea... a seborrheic and a dry" as they suggest. We have seen more than 300 patients with rosacea in the last four years and we have been impressed with the way in which one or the other physical sign is more prominent at different times. Certainly it has been our experience and the experience of others1 that patients with rosacea respond well to tetracycline without necessarily using any anti-Demodex type of local medication.Drs. Ayres and Mihan assert, without any evidence, that classical rosacea may be of multiple etiology and is frequently associated with disturbances of gastric secretion. We have taken considerable pains to ascertain whether any of the popularly held views as to the etiology of rosacea can withstand