PARASITES AFFECTING THE SKIN 25 
visable by some observers to cover the affected por- 
tions of skin with an agent which will exclude air, and 
so destroy the parasites. Collodion containing an anti- 
septic, such as acid salicylic or iodoform, has been used, 
and it is claimed to have been very successful. 
A solution we have found particularly useful in these 
cases is the following : 
B Iodi resublim. oe 8 sa Bye 
Pot. iodid. 3 st Be s4 “OJe8S: 
Hydrarg. biniodid. .. as es ©6585. 
S.V.R. .. ai an sa og: Oe 
Aqua ad 3iij 
M. Fiat lotio. _ 
This is applied once daily with a brush until the 
part becomes sore, when it is applied on alternate 
days. 
A lotion containing 4 per cent. formalin in glycerin 
and water will often effect a cure when the area affected 
is small in extent. 
2. When the disease is more advanced, a course of 
treatment with the oily dressing previously described 
will often effect a cure, providing that the two separate 
halves of the body are thoroughly dressed. 
Another method of treatment recommended quite 
recently is the internal administration of pot. iodid., 
combined with inunction of the skin with white precipi- 
tate ointment, with the idea of producing iodide of 
mercury in the skin as the pot. iodid. is excreted. We 
have seen little, if any, benefit accrue from this line of 
treatment. 
Hunting and Duguid’s dressing is frequently em- 
ployed—viz. : 
RB Creosote ae ass a os ai. 
Liq. potasse .. a 4a .. Bi. 
Ol. olive : -. ad Oui. 
M. Fiat lin. 
