The Backyard Integrated Tick Management Study · 2018. 1. 9. · The Backyard Integrated Tick...
Transcript of The Backyard Integrated Tick Management Study · 2018. 1. 9. · The Backyard Integrated Tick...
The Backyard Integrated Tick Management Study
Principal Investigators: Neeta Connally and Thomas Mather
Western Connecticut State UniversityUniversity of Rhode Island
Centers for Disease Control and Prevention
www.backyardtickstudy.org
TickNET: Lyme and other tickborne diseases prevention study 2011-2012
• Randomized, blinded, placebo-controlled trial
• Assessed efficacy of single springtime application of pesticide to residential yards
Tick abundance at acaricide vs. placebo groups
63% reduction in questing blacklegged tick nymphs
62% fewerp<0.001
Hinckley et al. J Infect Dis 2016
Human outcomes
• Despite reduction in ticks at intervention sites, human disease incidence and human-tick encounters were not reduced
• Future studies should:• Also use interventions that include reducing
tick infection rates• Understand behavior of humans in the
backyard environment
Hinckley et al. J Infect Dis 2016
TickNET: Bait Box Intervention Study (2013-2016)
• Randomized, blinded, placebo-controlled trial
• Assess efficacy of rodent-targeted tick control (Select TCS bait box)
• Outcome measures:• physician-diagnosed tickborne illness• tick-human encounters
• ticks attached• ticks crawling
METHODS
Participants
125 households from 2012 – 2015 (Pilot)
500 households from 2013 – 2016 (Full)
Enrolled, surveyed, and randomized to receive
Treated bait boxes (fipronil-treated wick)
Placebo bait boxes (no wick)
Backyard Integrated
Tick Management
Study 2016-2020
STUDY GOALS
1. Evaluate two tick management tick tactics
at single vs. contiguously treated backyards
2. Understand how people use outdoor environments
particularly backyards
TWO TICK MANAGEMENT INTERVENTIONS
Select TCS bait boxes
Targeted application of acaricide spray
Photos: www.tickboxtcs.com, www.tickencounter.org
STUDY DESIGN
Enrolled properties/households in western CT and southern RI
ITM approach: single acaricide spray plus bait boxes
Entomologic measures: tick abundance and infection rates
Human outcome measures: self reported tick encounters and human disease; daily activity log of property use
RESIDENTIAL TREATMENT GROUPS
SINGLE TREATED YARD(acaricide spray, active bait boxes)
CLUSTER OF TREATED YARDS(acaricide spray, active bait boxes)
SINGLE PLACEBO YARD(water spray, bait boxes without wick)
BAIT BOXES INSTALLED
SPRAY APPLIED
STUDY DESIGN
Two year treatment Households are blinded to treatment group Monthly surveys administered to measure
tick encounters and disease diagnosis Ticks detected on humans/pets submitted
to URI TickSpotters for confirmatory ID Daily activity survey administered for one
week in June
DAILY ACTIVITY SURVEY
Time spent in outdoor locations:In backyard:Forest edgeLawn adjacent to edgeLawn far from edgeGardens
Non-backyard locations
BITM STUDY – CURRENT STATUS
132 properties enrolledsingle treatedtreated clusterssingle placebo
Ticks sampled twice at all enrolled properties (pre-treatment) in late May-July 2017
Monthly surveys conducted May – Aug 2017
Daily activity survey conducted in June 2017
Bait boxes installed in late July 2017weighed 4 weeks post-installment
BITM STUDY – WHAT’S NEXT?
First acaricide treatment May 2018
Second bait box installment July 2018
Continue surveys, TickSpotters, residential tick sampling
For more information
www.backyardtickstudy.org
Spray Safe, Play Safe:
Promoting Integrated Tick Management for
Preventing Lyme Disease in Children
STUDY GOALS
Develop educational videos and other materials that address safe use of effective pesticides for tick control by families.
Disseminate educational materials to community members using multiple public platforms.
EPA Healthy Communities Grant Program 2017
AcknowledgmentsWestern Connecticut State UniversityRayda Krell Karen Thompson
University of Rhode IslandThomas Mather Howard Ginsberg Steve Engborg
Centers for Disease Control and PreventionDivision of Vector-Borne Infectious DiseasesLars Eisen Alison HinckleyRebecca Eisen Nicole BruenerCDC Cooperative Agreement 1U01CK000492
Town of Ridgefield, CT Health DepartmentJennifer Reid Ed Briggs