| Title: | Efficacy of collars with allomones on dogs to control Rhipicephalus sanguineus sensu lato infestations under field conditions |
| Author(s): | Barreto LP; Ribeiro-Silva CS; Machado LDC; Lima VH; Pinto SMN; Pereira-Junior RA; Carreira DN; Mascarin GM; Fernandes EKK; Borges LMF; |
| Address: | "Instituto de Patologia Tropical e Saude Publica, Universidade Federal de Goias, Goiania 74690-900, GO, Brazil. Instituto de Patologia Tropical e Saude Publica, Universidade Federal de Goias, Goiania 74690-900, GO, Brazil; Centro Universitario de Goias - UNIGOIAS, Goiania 74423-115, GO, Brazil. Embrapa Meio Ambiente, Jaguariuna 13820-000, SP, Brazil. Instituto de Patologia Tropical e Saude Publica, Universidade Federal de Goias, Goiania 74690-900, GO, Brazil. Electronic address: evertonkort@ufg.br. Instituto de Patologia Tropical e Saude Publica, Universidade Federal de Goias, Goiania 74690-900, GO, Brazil. Electronic address: ligia@ufg.br" |
| DOI: | 10.1016/j.ttbdis.2021.101769 |
| ISSN/ISBN: | 1877-9603 (Electronic) 1877-959X (Linking) |
| Abstract: | "Benzaldehyde and 2-hexanone are allomones produced by beagle dogs that reduce infestation by Rhipicephalus sanguineus sensu lato on these animals and on susceptible dogs which artificially release these repellents. These observations were obtained in previous laboratory tests or artificial infestations of susceptible dogs under controlled conditions. Here we evaluated the efficacy of collars delivering these repellents for suppressing the loads of R. sanguineus s.l. on naturally infested mixed-breed dogs under field conditions. Thirty dogs naturally infested with R. sanguineus s.l. were separated into two groups with 15 dogs each. The dogs from the treatment group received the collars with slow-release formulations of the allomones, and the dogs from the control group received collars without such compounds. Collar effectiveness tests were carried out over 30 days. All ticks found were removed from each dog, identified, and counted every collection day. The density of the different life stages of R. sanguineus s.l. varied greatly between groups and across evaluation times. Adult ticks were the stage most abundant and prevalent on infested dogs. The counts for larvae, nymphs and adults were similar between the control and the treatment groups within each tick collection day. Conversely, when we considered the total number of ticks over 30 days and gathered all life stages collected in the same animal, the dogs from the control group had significantly higher loads (35.3 +/- 4.27) of ticks than the dogs from the treatment group (21.8 +/- 2.96) (P < 0.01). In addition, the efficacy of treatment with repellent collars was high for adult ticks (30.8%) but was extremely low for reducing larval or nymphal infestation (0 or 2.6%, respectively). The present study demonstrates, for the first time, the efficacy of these volatile compounds on naturally infested dogs under field conditions. The development of a technologically enhanced device for slow release of the allomones tested here can be an advantageous alternative for reducing R. sanguineus s.l. infestation on dogs in residential environments" |
| Keywords: | Animals Brazil Dog Diseases/parasitology/*prevention & control Dogs Pheromones/*therapeutic use Protective Agents/*therapeutic use Rhipicephalus sanguineus/*drug effects Tick Infestations/parasitology/prevention & control/*veterinary 2-hexanone Benzaldehy; |
| Notes: | "MedlineBarreto, Lucas P Ribeiro-Silva, Carita S Machado, Lucas Damiao C Lima, Valesca H Pinto, Salorrane M N Pereira-Junior, Ronaldo A Carreira, Dhiogo N Mascarin, Gabriel M Fernandes, Everton K K Borges, Ligia M F eng Netherlands 2021/07/05 Ticks Tick Borne Dis. 2021 Sep; 12(5):101769. doi: 10.1016/j.ttbdis.2021.101769. Epub 2021 Jun 17" |
