title: Field Comparisons of the Gravid Aedes Trap (GAT) and BG-Sentinel Trap for Monitoring Aedes albopictus (Diptera: Culicidae) Populations and Notes on Indoor GAT Collections in Vietnam.
abstract: We report on the use of the Gravid Aedes Trap (GAT) as a surveillance device for Aedes albopictus (Skuse) relative to the BG-Sentinel (BGS) trap in field studies conducted in Trenton, NJ, and on Hammond Island, Queensland, Australia. A parallel study conducted in Nha Trang, Vietnam, assessed the use of the GAT as an indoor surveillance device as well as the use of canola oil as a noninsecticide killing agent. In Trenton and Hammond Island, the GAT collected fewer male (0.40 ± 0.12 and 0.43 ± 0.30, respectively) and female (3.05 ± 0.67 and 2.7 ± 2.3, respectively) Ae. albopictus than the BGS trap (males: 3.54 ± 1.26 and 3.75 ± 0.83; females: 4.66 ± 1.18 and 3.9 ± 0.23) over their respective sampling periods (i.e., 24 h for the BGS and 1 wk for the GAT). Despite differences in capture rates, the percentage of traps positive for female Ae. albopictus was similar between the BGS and GAT (Trenton: 60.1 ± 6.3% and 64.4 ± 4.1%; Hammond: 87.5 ± 6.9% and 80.0 ± 8.2%). In Nha Trang, the GAT was equally effective indoors and outdoors with (10 g hay or 3 g fish food) and without (water or empty) infusion. Additionally, no significant decrease in collections was observed between GATs set with canola oil or long-lasting insecticidal net. In summary, both traps were successful in monitoring female Ae. albopictus over their respective trapping intervals, but would be best used to complement each other to monitor both sexes and all physiological stages of female Ae. albopictus. However, the versatility and low-cost of the GAT makes it an attractive alternative to the more expensive BGS trap.
authors.affiliation: College of Public Health, Medical and Veterinary Sciences, James Cook University, PO Box 6811, Cairns, Queensland 4870, Australia ( brian.johnson@jcu.edu.au; scott.ritchie@jcu.edu.au).|Australian Institute of Tropical Health and Medicine, James Cook University, PO Box 6811, Cairns, Queensland 4870, Australia.
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Johnson
authors.affiliation: Australian Foundation for Peoples of Asia and the Pacific Limited, Hanoi, Vietnam (tim.hurst@monash.edu).
authors.forename: Tim
authors.initials: T
authors.lastname: Hurst
authors.affiliation: National Institute of Hygiene and Epidemiology, Hanoi, Vietnam (hung@edp-portal.com).
authors.forename: Hung Luu
authors.initials: HL
authors.lastname: Quoc
authors.affiliation: Mercer County Mosquito Commission, West Trenton, NJ ( iunlu@mercercounty.org).|Center for Vector Biology, Rutgers University, 180 Jones Ave., New Brunswick, NJ.
authors.forename: Isik
authors.initials: I
authors.lastname: Unlu
authors.affiliation: Private Contracting Entomologist, Hammond Island, Queensland, Australia (cgfreebairn@hotmail.com).
authors.forename: Christopher
authors.initials: C
authors.lastname: Freebairn
authors.affiliation: Salt Lake City Mosquito Abatement District, 2020 North Redwood Rd., Salt Lake City, UT (ary@slcmad.org).
authors.forename: Ary
authors.initials: A
authors.lastname: Faraji
authors.affiliation: College of Public Health, Medical and Veterinary Sciences, James Cook University, PO Box 6811, Cairns, Queensland 4870, Australia ( brian.johnson@jcu.edu.au; scott.ritchie@jcu.edu.au).|Australian Institute of Tropical Health and Medicine, James Cook University, PO Box 6811, Cairns, Queensland 4870, Australia.
authors.forename: Scott A
authors.initials: SA
authors.lastname: Ritchie
mesh_terms: D000330:Aedes / Q000502:physiology*; D000818:Animals; D005260:Female; D008297:Male; D009032:Mosquito Control / Q000295:instrumentation / Q000379:methods*; D014744:Vietnam
keywords: Aedes aegypti; Aedes albopictus; Biogents-Sentinel Trap; Gravid Aedes Trap; surveillance