State the method of examination for fungus.
The scrapings are taken from a patch, moistened with liquor potassæ, and examined with a power of three to five hundred diameters.
State the prognosis of tinea versicolor.
With proper management the disease is readily curable. Relapses are not uncommon.
Fig. 74.
Tinea versicolor.
What is the treatment of tinea versicolor?
It consists in daily washing with soap and hot water (and in obstinate cases with sapo viridis instead of the ordinary soap) and application of a lotion of—sulphite or hyposulphite of sodium, a drachm to the ounce; sulphurous acid, pure or diluted; carbolic acid, or resorcin, ten to twenty grains to the ounce of water and alcohol; or corrosive sublimate, one to three grains to the ounce of water. Sulphur and ammoniated-mercury ointments are also serviceable. The following used alone, simply as a soap, or in conjunction with a lotion, is often of special value:—
℞ Sulphur, præcip., ................................ ʒiv
Saponis viridis, ................................. ʒxii. M.