infestation, while only 32 of these animals presented lice. Lice are obligatory, permanent parasitic insects belonging to order Phthiraptera, which have a developed proboscis to suck blood from capillaries (suborder Anoplura) of mammals, or chewing mouth pieces, adapted to eat hairs and feathers, and sometimes also the skin and blood of birds and mammals (suborders Amblycera, Ischnocera, and Rhynchophthirina, formerly known as Mallophaga). J. V, Milnes, A.S., O’Callaghan, C.J., Green, L.E., 2003. SUMMARY The efficacy of one administration of moxidectin against natural infestations of the 3 common species of cattle lice in Australia: Linognathus vitull, Damallnla bovls and Haematoplnus eurysternus, was determined. One, sied. Control of body sucking lice is obtained by cleaning of clothes and bathing, but that of head lice needs careful collective surveying, associated with the use of louse combs, and eventually insecticides may be very carefully utilized. Eprinomectin: a novel avermectin for control of lice in all classes of cattle. Aust. Following each 32-day commingling interval, seeder and sentinel animals were removed, and principal animals were sorted into pens by treatment. Relative to pretreatment and Day 28 counts, populations of, generally heavier on cattle, regardless of treatment, on Day 63, Day 98 and Day 133, which, coincided with the time frame from mid-January to late-March at both sites. Ranjan, S., Szewczyk, E., Search, R., Pollet, R., Delay, R., 2003. Summary statistics were produced and due to the repeated measured and hierarchical structure of the data, multi-level analysis was used to model the population dynamics of Bovicola bovis and assess the influence of the various hierarchical levels. Insect species present and the number of trials that included each species were: Hypoderma lineatum, 2; Hypoderma bovis. Animals in each group received either IVM (Ivomec 1%, MSD AGVET, Rahway, NJ, USA), MXD (Cydectin 1%. For, each louse species, counts were transformed by the, tion prior to performing analysis of variance (ANOV, sites, and site by treatment interactions (, ment was tested for significance at the 5% level against the residual error in the ANO, Least squares means of transformed lice counts of moxidectin-treated groups were com-, pared to the least squares mean of the control group using a one-sided, The effect of each moxidectin treatment against each species of louse was considered ade-, quate when each of three conditions were met: (1) efficacy equaled or exceeded 95% based, on geometric means; (2) at least six control cattle were infested with the specific louse, species; and (3) treatment means were significantly less than the mean for control animals, animal, ranged from 448 to 32 in Wisconsin (arithmetic mean, mals assigned to receive the saline, M15/0.75, or M10/1.0 in W, assigned to M15/0.75 and 9/20 cattle assigned to M10/1.0 (, to M10/1.0 were infested before treatment (, Fifty-seven of 60 principal study animals assigned to the study completed the test. 42370. Summarized across all study sites, proportions of cattle that received concurrent therapeutic treatments were similar among treatment groups. 10015. D. bovis and L. vituli occur throughout New Zealand with D. bovis more prevalent on beef breeds, Slow release formulations of 375, 750, and 1,125 mg (AI) in 50-g boluses and a subcutaneous injectable formulation (0.2 mg AI/kg body wt) of moxidectin (CL301423) were tested for the control of the little blue cattle louse, Solenoptes capillatus (Enderlein), and the cattle biting louse, Bovicola bovis (L). Predilection sites were examined on sentinel animals on the day they were commingled, with seeder and principal animals and on the day they were removed. Heifers with a heavy infestation of cattle lice (10 or more per 6.452 cm2 [1 in2] of Bovicola bovis (L.), Linognathus vituli (L.), and Solenopotes capillatus Enderlein) gained significantly less weight (0.09 kg [0.21 lb]/day) than heifers treated with stirofos or trichlorfon. U.S. Department. The mean number of heartworms recovered from dogs that had received the saline control injection was 35.7. Throughout the post-treatment period, injection sites of all dogs were periodically examined visually and by palpation. infestation and treated heifers. Animals kept on a low plane of nutrition were more heavily infested than those on a higher plane. In contrast the pour-on formulation at 0.5 mg/kg provided consistently high efficacy (83.6 to 100%) against D bovis on 3 farms. Individuals that performed lice counts were unaware of the treatments applied to individual, animals. The product had persistent efficacy of >90% against D. viviparus, H. placei and Oe. On Day 60, principal study animals were sorted back into pens by treatment. Holste, J.E., Smith, L.L., Hair, J.A., Lancaster, J.L., Lloyd, J.E., Langholf, 1997. There were no differences on Cmax values: the area under the concentration-time curve (AUC) was higher for IVM (459 ng.d/mL) and DRM (627 ng.d/mL) compared to that of MXD (217 ng.d/mL). Four seeder cattle were used for, all but the last commingling period at each site. lice infestations during the final commingling period. Variance contributed by the individual animal was less than that contributed by the body site examined and the time of the inspection.