Pressurized Sprays of Permethrin or Deet on Military Clothing for Personal Protection Against Ixodes Dammini (Acari: Ixodidae)12

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Abstract
Pressurized sprays of commercially available permethrin at 0.5% or deet at 20 or 30% concentrations applied to military field uniforms were evaluated as protectants against Ixodes dammini at Great Island, West Yarmouth, Massachusetts, USA, during May 1984. The tick-infested test site was in southeastern Massachusetts, where Lyme disease and babesiosis are zoonotic. A 1-min application of permethrin to the exterior surface of pants and jackets provided 100% protection against attack by all life stages of the tick, while 1-min applications of 20 and 30% deet provided 86 and 92% protection, respectively. These differences were statistically significant (P ≤ 0.05) for adult ticks and for all tick life stages considered together.