Efficacy of the d-phenothrin/pyriproxyfen association against mites in naturally co-infested rabbits

Abstract

The aim of the present study was to evaluate the efficacy of the d-phenothrin/pyriproxyfen association against Psoroptes ovis, Cheyletiella parasitivorax, and Leporacarus gibbus infestations in naturally co-infested rabbits. Twenty crossbreed (New Zealand White x California) rabbits concurrently infested by the three mite species were randomly divided in two groups. All rabbits presented with hyperemia, erythema and formation of crusts in the ear canals caused by P. ovis. Infestations by both C. parasitivorax and L. gibbus were considered asymptomatic in all animals.Ten animals were treated with a 4.4% d-phenothrin and 0.148% pyriproxyfen spray formulation until have their body surface uniformly sprayed, including external ear canals. The other ten rabbits remained untreated, serving as control group. Observations were done on days +7, +14, +21, +28, and +35 post-treatment. The dphenothrin/pyriproxyfen association showed 100% efficacy against the three mite species and was responsible for the remission of psoroptic mange lesions on treated animals. No signs of intoxication were observed. The results indicate that d-phenothrin/pyriproxyfen spray formulation in a single application is an effective and clinically safe option for the control of different mite infestations in rabbits.

New record of Cheyletiella parasitivorax (Mégnin, 1878) (Trombidiformes: Cheyletidae) from Brazil with an illustrated key to species for the genus

“…Distribution: Worldwide. In Brazil, C. parasitivorax was only known to occur in the São Paulo state -São Paulo city (Amaral, 1971) and Garça city (Alvim et al, 2005), and in Rio de Janeiro state -Seropédica city (Fernandes et al, 2013). The new occurrence of this species on a rabbit from Jundiai city (present study) is the third record of the species in the state of São Paulo.…”

Eficácia da ivermectina oral no controle de Psoroptes ovis e Leporacarus gibbus em coelhos naturalmente infestados

“…O coelho (Oryctolagus cuniculus) foi uma das primeiras espécies utilizadas na experimentação biológica, sendo utilizado em pesquisas laboratoriais, principalmente em estudos de bacteriologia, fisiologia e nutrição; e ainda, em laboratórios clínicos, estudos sobre hormônios e para a produção de vacinas e soros (De Almeida & Leite 2012). Atualmente, além de ser considerado um animal economicamente importante na produção de carne, pele e couro (Fernandes et al 2013), tem sido amplamente utilizado em zooterapia, pois acelera a recuperação de humanos hospitalizados ou portadores de doenças crônicas (Samfira & Petroman 2011).…”