At present, the word eczema is used to designate almost any dermatitis whose cause has not been discovered. Thus, in the past, the word tinea was used for any disease of the scalp, for the ancients had no means of establishing the etiology of any of these diseases, except perhaps pediculosis. Nevertheless, one form of tinea differed so greatly from all the others, and had such cleancut peculiarities, that it became known as tinea vera. It was known also as tinea lupinosa, and later, in England, as porrigo lupinosa. This is the disease now known as favus. The tinea favosa of all authors before 1800 was not favus at all but impetigo. The transfer of the adjective, favosa, from impetigo to the disease now known as favus was due to Alibert, whose mistake has become fixed in modern usage. Although the disease was recognized as a distinct entity, its etiology
WILLIAMS CM. THE ENLARGING CONCEPTION OF DERMATOPHYTOSIS. Arch Derm Syphilol. 1927;15(4):451–469. doi:10.1001/archderm.1927.02370280067003
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