Ctenocephalides felis (cat flea) infestation in neonatal dairy calves managed with deltamethrin pour-on in Australia

Deltamethrin Application on Pre-Weaned Calves Improves Feed Consumption, Stress and Fatigue Status under Heat Stress Conditions

“…More precisely, pre-weaned calves exposed to heat stress with severe fly infestation reduced their daily consumption of concentrates and roughages, which corresponded to almost 0.5 Mcal of metabolizable energy, and 27.0 g of crude protein, according to their diet composition. In accordance with our study, Tsoi et al [25] recorded an increase in feeding supported by an improved body condition score of the deltamethrin treated neonatal dairy calves against heavy cat fleas' infestation of these animals.…”

“…Similar situations in the literature, where large burdens of ectoparasites such as cat fleas being responsible for discomfort and the welfare implications [39,40], were previously reported, not only in dairy calves of North America [41], Brazil [42] and Eastern Australia [25], but also in sheep and goats from Libya [43] or Israel [44].…”

“…In our study, this was the first time the fly repellency effect of deltamethrin in pre-weaned dairy calves was studied, and its beneficial effects (i.e., deltamethrin treated calves had 60.6 less flies landing on their skin compared to the placebo treated ones) against heavy fly infestation were recorded. Another study, conducted by Tsoi et al [25], confirmed the significant reduction of a heavy cat fleas (Ctenocephalides felis) infestation on dairy calves, after the pour-on application of deltamethrin.…”

“…Dependent variables and the residuals of the initially tested linear regression models were not normally distributed; therefore, inverse Gaussian regression models were used to estimate the random effect of the s th calf and the fixed effects of deltamethrin treatment, the sampling occasion, and the farm on the SC and CK levels, flies' number, and daily consumption of concentrates and roughages, as described below: Y jkns = µ + T j + S k + F n + γ s + e jkns (Model 1) where Y jkns = dependent variable (SC and CK levels, number of flies landed on a calf within a 2-min period, and daily consumption of concentrates and roughages), µ = intercept, T j = fixed effect of calves group (j = 2 levels, 0 = Deltamethrin treated group, 1 = Control group), S k = fixed effect of the sampling occasion (k = 5 levels, Days 15,25,35,45, and 55, for daily consumption of concentrates and roughages k = 4 levels, Days 25, 35, 45 and 55), F n = fixed effect of the farm (n = 2 levels, 0 = farm A, 1 = farm B), γ s = repeated variation of the s th calf, and e jkns = residual error. In every case, first order autoregressive was used as covariance structure.…”

Risk factors analysis for neglected human rickettsioses in rural communities in Nan province, Thailand: A community-based observational study along a landscape gradient

“…typhi . However, previous publications revealed potential occurrences of flea infestation on cattle; e.g., Ctenocephalides felis felis was found on buffalo calves in India [ 67 ] and on dairy calves in Australia [ 68 ]; Pulex irritans infested on cow and sheep in Iran [ 69 ]. In terms of poultry, several ectoparasite species such as biting lice (e.g., Lipeurus caponis , Goniodes dissimilis , G .…”