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Psoroptes spp. 
Infusions of crushed fresh or dried derris roots were effec- 
tive against psoroptic scabies on horses end carabaos in the Philippine 
Islands. Dried root infusion cured carabao scabies when applied 
twice. — Gapuz (214). 
Sarcoptidae 
Sarcoptes scebiei (Deg.), the human itch mite 
In Bigland the time taken to cure 20 cases (as a group) of scabies 
by each of five different treatments was as follows: Sulfur ointment, 
46 days; sulfur ointment and confection of sulfur, 59 days; benzyl 
benzoate, 30 days; rotenone, 38 days; and derris root, 41 days. The 
derris root method is the most satisfactory. It is very cheap, clean 
and effective. Benzyl benzoate is the quickest, but may occasionally 
cause dermatitis. Rotenone is very expensive and caused dermatitis in 
3 of the 20 cases. Sulfur ointment is cheap and efficient but is a very 
messy, annoying method.— Buchan (95). 
Rotenone has been used successfully in an ointment for the treat- 
ment of scabies.— Dunn and coworkers (151 ) . 
The substances in popular use for the control of scabies contain 
sulfur, rotenone, or benzyl benzoate. In a study in which rodents were 
used, rotenone was discarded at an early stage because of the severe 
scrotal dermatitis that is occasionally provoked.— Gordon and Seaton 
(237). 
Experiments with scabies on infested soldiers in two Canadian 
military camps showed that aliphatic thiocyanates, derris, cube, or pyre- 
thrum extracts incorporated with carrier materials in the form of lotions 
and ointments, were very effective.— McLaine (386, p. 11). 
One application of a 2-percent emulsion of rotenone, called n Sarevan, n 
was much less effective than sulfur ointment for scabies. A number of 
patients were treated with four applications of it, and a satisfactory cure 
was obtained but some of them developed an intractable scrotal dermatitis. 
— Mellanby and coworkers (411 ) • 
In England in 1941 applications of a derris lotion were made 
morning, noon, and night for 2 days; 52 patients who wore only pyjamas, 
and 38 others who wore their usual clothing, were all cured of scabies; 
35 of the men treated complained of a burning sensation in the scrotum 
and penis. The treatment was recommended for civilians in shelters and 
