A lotion of corrosive sublimate, one to four grains to the ounce; infusion of tobacco; a ten to twenty per cent. ointment of oleate of mercury; ammoniated mercury ointment, and a five to ten per cent. β-naphthol ointment. Repeated washings with vinegar or dilute acetic acid, or with alkaline lotions, will free the hairs of the ova.
Cysticercus Cellulosæ.
Describe the cutaneous disturbance produced by the cysticercus cellulosæ.
The presence of cysticerci in the skin and subcutaneous tissue gives rise to pea to hazelnut-sized, rounded, firm, movable tumors which, when developed, may remain unchanged for months. The parasites are disclosed by microscopic examination.
Most of the cases have been observed in Germany.
Filaria Medinensis.
(Synonym: Guinea-worm.)
State the character of the lesions produced by the filaria medinensis.
The young microscopic worm penetrates the skin or deeper tissue, where it grows gradually, finally reaching several inches or more in length and about a half-line in thickness; inflammation is excited and a tumor-like swelling makes its appearance, which, sooner or later, breaks, disclosing the worm. It may also present a cord-like appearance. It is rarely met with outside of tropical countries.