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Effectiveness of the 4-Poster passive topical treatment device in the control of Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) in New Jersey.

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Abstract

Twenty-five “4-Poster” feeders were placed throughout a 5.2 km(2) study area within a secured military facility situated in a hyperendemic area for
Lyme disease in central Monmouth County, New Jersey. Calculated levels of control, relative to untreated areas, peaked at 82.7%, 77.3%, and 94.2% for of host-seeking Ixodes scapularis Say larvae, nymphs, and adults, respectively, within 5 years of deployment. Control of host-seeking Amblyomma americanum (L.) peaked at 99.2%, 89.5%, and 96.9% for larvae, nymphs, and adults, respectively, during the treatment period. Tick burdens on hunter-killed deer were significantly reduced on deer harvested from the treatment area and on deer that had consumed bait corn. Populations of subadult I. scapularis and A. americanum demonstrated some rebound effect following the removal of 4-Posters, but treatment area tick populations remained lower than control area populations 2 years following withdrawal of the 4-Posters. However, control of I. scapularis adults declined to 20.7% by the third fall activity period following removal of the 4-Posters. The posttreatment phase of the study was of insufficient duration to evaluate continued population rebound of adults and subadults during subsequent activity periods.

Vector Borne Zoonotic Dis. 2009 Aug;9(4):389-400. doi: 10.1089/vbz.2008.0160. Evaluation Studies; Research Support, U.S. Gov’t, Non-P.H.S.

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