title: Laboratory and field evaluation of rodent bait treated with fipronil for feed through and systemic control of Phlebotomus papatasi.
abstract: The sand fly Phlebotomus papatasi is the main vector of Leishmania major, etiologic agent of zoonotic cutaneous leishmaniasis (ZCL), which is endemic in North Africa, the Middle East, and Asia. In North Africa, Meriones shawi is one of the two main reservoir hosts of L. major. P. papatasi populations are maintained in borrowing rodents such as M. shawi. Three fipronil-treated rodent baits were evaluated for systemic and feed through insecticidal activity against P. papatasi feeding on M. shawi. Through blood feeding bioassays, mortality rates of females P. papatasi increased with the concentration of fipronil in the rodent bait varying from 0.001% to 0.005%. In the laboratory, more than 90.0% of P. papatasi were killed within 48h after blood feeding on the desert's jirds, M. shawi, treated up to 29 days prior with a single application of fipronil at a concentration of 0.001%, 0.0025% and 0.005%. Through larval bioassays, mortality rates of larvae that have fed on faeces of treated bait for M. shawi increase with the concentrations of fipronil. Faeces of orally-treated Meriones were significantly toxic to larvae for 5 weeks with a concentration of 0.005%. In the field, application of treated bait resulted in 80.0% reduction in the populations of P. papatasi up to 6 weeks after a single application of fipronil at a concentration of 0.005%. This is the first study to demonstrate field efficacy of fipronil-treated rodent baits for P. papatasi control and the first study to evaluate this approach in M. shawi, a principal ZCL reservoir host. These results suggest that fipronil-treated rodent baits can be used to effectively reduce the populations of P. papatasi associated with M. shawi in ZCL endemic areas.
authors.affiliation: Institut Pasteur de Tunis, Laboratory of Vector Ecology, 13 Place Pasteur, BP 74, 1002 Tunis, Tunisia.
authors.forename: M
authors.initials: M
authors.lastname: Derbali
authors.affiliation: Genesis Laboratory Inc., 10122 NE Frontage Road, Wellington, CO 80549, USA.
authors.forename: L
authors.initials: L
authors.lastname: Polyakova
authors.affiliation: National Institute of Statistics, Tunis, Tunisia.
authors.forename: A
authors.initials: A
authors.lastname: Boujaâma
authors.affiliation: Genesis Laboratory Inc., 10122 NE Frontage Road, Wellington, CO 80549, USA.
authors.forename: D
authors.initials: D
authors.lastname: Burruss
authors.affiliation: Institut Pasteur de Tunis, Laboratory of Vector Ecology, 13 Place Pasteur, BP 74, 1002 Tunis, Tunisia.
authors.forename: S
authors.initials: S
authors.lastname: Cherni
authors.affiliation: Institut Pasteur de Tunis, Laboratory of Vector Ecology, 13 Place Pasteur, BP 74, 1002 Tunis, Tunisia.
authors.forename: W
authors.initials: W
authors.lastname: Barhoumi
authors.affiliation: Institut Pasteur de Tunis, Laboratory of Vector Ecology, 13 Place Pasteur, BP 74, 1002 Tunis, Tunisia.
authors.forename: I
authors.initials: I
authors.lastname: Chelbi
authors.affiliation: Genesis Laboratory Inc., 10122 NE Frontage Road, Wellington, CO 80549, USA.
authors.forename: R
authors.initials: R
authors.lastname: Poché
authors.affiliation: Institut Pasteur de Tunis, Laboratory of Vector Ecology, 13 Place Pasteur, BP 74, 1002 Tunis, Tunisia. Electronic address: elyes.zhioua@gmail.com.
authors.forename: E
authors.initials: E
authors.lastname: Zhioua
mesh_terms: D000821:Animal Feed; D000818:Animals; D004197:Disease Reservoirs; D005247:Feeding Behavior; D006801:Humans; D007300:Insect Control / Q000379:methods*; D007306:Insecticides / Q000008:administration & dosage*; D007896:Leishmaniasis / Q000517:prevention & control*; D010691:Phlebotomus / Q000469:parasitology*; D011720:Pyrazoles / Q000008:administration & dosage*; D016019:Survival Analysis
chemical_list: D007306:Insecticides; D011720:Pyrazoles; C082360:fipronil
keywords: Leishmania major; Meriones shawi; Phlebotomus papatasi; Systemic and feed through insecticide; Zoonotic cutaneous leishmaniasis