1 The Department of Dermatology and Syphilology, University of Pennsylvania, Philadelphia, Pa.
Papular urticaria (lichen urticatus) is a chronic disease which in the great majority of cases occurs during the warm seasons on exposure to fleas and bedbugs.
Skin tests indicate many such patients are abnormally sensitive to these insects.
In the three year study reported, it was demonstrated that 86% of the patients could be cured in two weeks with a 5% DDT dusting powder and DDT household spray, whereas with former methods of therapy, only 21% were cured in 11 weeks of treatment.
Submitted on May 31, 1949