A study was done to evaluate the personal protection afforded by uniforms treated with permethrin (0.125 mg/cm2) against natural infestations of chigger mites, Trombicula spp. The study utilized human test subjects taking part in a military field training exercise. At the end of the 3-day period, there was a 74.2% increase in protection provided by the treated uniforms compared to an untreated uniform and the use of repellent. The increased protection amounted to ca 60 fewer mite attachments per treated subject. The treated uniforms were also found to be nonirritating and nonodorous.
Medical Entomologist, LCDR, MSC, USN assigned to 2d Med. Bn., 2d FSSG, FMFLANT, Camp Lejeune, North Carolina. (Present address: NEPMU-7, Box 41, FPO New York 09521.)
Research Entomologist, Insects Affecting Man and Animals Research Laboratory, ARS, USDA, P.O. Box 14565, Gainesville, Florida 32604.
Environmental Health Officer, ENS, MSC, USN assigned to 2d Med. Bn., 2d FSSG, FMFLANT, Camp Lejeune, North Carolina 28542.