_http://www.liebertonline.com/doi/abs/10.1089/vbz.2010.0158_
(http://www.liebertonline.com/doi/abs/10.1089/vbz.2010.0158)
Vector-Borne and Zoonotic Diseases
Pilot Study Assessing the Effectiveness of Long-Lasting
Permethrin-Impregnated Clothing for the Prevention of Tick Bites
To cite this article:
Meagan F. Vaughn and Steven R. Meshnick.
Vector-Borne and Zoonotic Diseases. July 2011, 11(7): 869-875.
doi:10.1089/vbz.2010.0158.
Published in Volume: 11 Issue 7: July 7, 2011
Online Ahead of Print: March 11, 2011
Abstract
Introduction: Tick-borne diseases such as Lyme disease, Rocky Mountain
spotted fever, and ehrlichiosis are a significant concern for many
thousands of workers who have frequent and unavoidable exposure to
tick-infested habitats. Many North Carolina state employees with outdoor
occupations report multiple tick bites each year, indicating that
existing tick preventive strategies may be underutilized or ineffective.
Treatment of clothing with permethrin, a nontoxic chemical with
insecticidal, knockdown, and repellent properties, is highly effective
against ticks. However, most permethrin products must be reapplied after
several washings to maintain insecticidal activity. Recently, a
factory-based method for long-lasting permethrin impregnation of
clothing has been developed by Insect Shield, Inc., that allows clothing
to retain insecticidal activity for over 70 washes.
Methods: A nonrandomized open label pilot study was conducted to
determine the effectiveness of Insect Shield–treated clothing for the
prevention of tick bites among 16 outdoor workers from the North
Carolina Division of Water Quality under actual field conditions.
Participants completed questionnaires at the start of follow-up (March,
2008) and at the end of follow-up (September, 2008), and tick bites and
outdoor work hours were reported on weekly tick bite logs for the entire
follow-up period.
Results: Subjects wearing Insect Shield–treated clothing had a 93%
reduction (p < 0.0001) in the total incidence of tick bites compared to
subjects using standard tick bite prevention measures.
Conclusion: This study provides preliminary evidence that long-lasting
permethrin-impregnated clothing may be highly effective against tick
bites.
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