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- Title
Five-month comparative efficacy evaluation of three ectoparasiticides against adult cat fleas ( Ctenocephalides felis), flea egg hatch and emergence, and adult brown dog ticks ( Rhipicephalus sanguineus sensu lato) on dogs housed outdoors.
- Authors
Varloud, Marie; Hodgkins, Elizabeth
- Abstract
This study was designed to compare the efficacy of three topical combinations on dogs in outdoor conditions against adult cat fleas ( Ctenocephalides felis), flea egg hatch and emergence, and against adult brown dog ticks ( Rhipicephalus sanguineus sensu lato). Treatment was performed on day 0 with a placebo; dinotefuran, pyriproxifen and permethrin (DPP); fipronil and (S)-methoprene (FM) or imidacloprid and permethrin (IP). Dogs ( n = 32), housed outdoors for 7 months, were treated monthly for four consecutive months (on days 0, 30, 60 and 90) and infested with ~100 unfed adult fleas on days 14, 55, 74, 115 and 150 and with ~50 unfed adult ticks on days 28, 44, 88 and 104. Adult fleas were counted and removed 24 h after infestation. Immediately after flea removal, dogs were reinfested with ~100 new adult fleas 72 h prior to egg collection for up to 48 h. Flea eggs were incubated for 32 days, and newly emerged adults were counted. Ticks were counted and removed 48 h after each infestation. FM had >90 % efficacy against fleas at each time point and variable efficacy against ticks (38.0-99.6 %). Efficacy of IP was <90 % against fleas at day 64 and against ticks at day 30 of the first post-treatment. No flea eggs were laid in the treated groups until infestation was carried out >60 days after the last treatment. Despite challenging weather conditions, DPP was highly effective, providing >90 % efficacy against adult ticks as well as adult and immature fleas at every time point of the study.
- Subjects
ANTIPARASITIC agents; CAT flea; INSECT egg hatchability; BROWN dog tick; ECTOPARASITES; DOG parasites
- Publication
Parasitology Research, 2015, Vol 114, Issue 3, p965
- ISSN
0932-0113
- Publication type
Article
- DOI
10.1007/s00436-014-4262-5