Broiler breeder vaccination against IBD is usually based on the injection of at least one inactivated vaccine in oil adjuvant, typically included in a combined vaccine. Priming using one or several IBD vaccine (s) has...Broiler breeder vaccination against IBD is usually based on the injection of at least one inactivated vaccine in oil adjuvant, typically included in a combined vaccine. Priming using one or several IBD vaccine (s) has been the most common way to immunize the breeders so far. In summary, protection against vvIBD challenge in chicks of one commercial genetic line vaccinated in ovo with the HVT-IBD vector vaccine was demonstrated. The parents’ IBD vaccination program, using the HVT-IBD vector vaccine alone, the HVT-IBD vector vaccine plus IBD inactivated vaccine, and inactivated IBD vaccine alone, did not impair their progeny’s in ovo HVT-IBD vector vaccine take and subsequent protection against vvIBD virus challenge. An advantage in terms of immunization of the progeny against vvIBD was shown in the chicks born to breeders vaccinated with the HVT-IBD vaccine as a primer, as compared to breeders vaccinated with the inactivated vaccine alone. High level of IBD maternally-derived antibodies transmitted to the progeny by their parents induces together with an early onset of immunity by in ovo injection of a HVT-IBD vector vaccine clinical protection, as monitored on bursas, after vvIBD virus challenge.展开更多
Because of their convenience, oral dosage forms are an emerging trend in companion animal formulations. Ectoparasiticides represent a significant proportion of the treatments administered to pets, and recently oral fo...Because of their convenience, oral dosage forms are an emerging trend in companion animal formulations. Ectoparasiticides represent a significant proportion of the treatments administered to pets, and recently oral formulations have been commercialized. They have to demonstrate high palatability to ensure that they are voluntarily accepted by the animal especially because they are repeatedly offered medications. The present study aimed to compare the dog’s preference between two commercially available oral ectoparasiticide formulations containing either afoxolaner (NexGard®, Merial) or fluralaner (Bravecto®, MSD Animal Health). In two separate experiments, 225 individual dogs (115 and 110 respectively) were offered a choice of afoxolaner or fluralaner chewable tablets. The 225 dogs were given an opportunity to smell both products, and then the products were simultaneously offered to each dog by hand for 4 consecutive days with products offered from alternate hands on each day. Individual consumption and related behaviors were recorded. The same individual offered the products to the dogs throughout each study. The total number of chewable tablets for each formulation was recorded and preference was evaluated as the consumption of a given formulation during more days. A total amount of 797 tablets were consumed by the 225 dogs during the 4 days of the studies. A total of 573 (71.9%) afoxolaner chews and 224 (28.1%) fluralaner chews were consumed voluntarily. The overall consumption ratio was 2.56 to 1 for NexGard®?to Bravecto®, with significantly (p ®?than Bravecto®?on each day. As for dogs demonstrating a preference over the entire test period;83% of the dogs tested preferred NexGard®?to Bravecto®, resulting in a preference ratio of 5 to 1 for afoxolaner formulation versus fluralaner formulation. This study demonstrated that when dogs were offered a choice between the two ectoparasiticide products, a significant preference for NexGard®?was observed.展开更多
文摘Broiler breeder vaccination against IBD is usually based on the injection of at least one inactivated vaccine in oil adjuvant, typically included in a combined vaccine. Priming using one or several IBD vaccine (s) has been the most common way to immunize the breeders so far. In summary, protection against vvIBD challenge in chicks of one commercial genetic line vaccinated in ovo with the HVT-IBD vector vaccine was demonstrated. The parents’ IBD vaccination program, using the HVT-IBD vector vaccine alone, the HVT-IBD vector vaccine plus IBD inactivated vaccine, and inactivated IBD vaccine alone, did not impair their progeny’s in ovo HVT-IBD vector vaccine take and subsequent protection against vvIBD virus challenge. An advantage in terms of immunization of the progeny against vvIBD was shown in the chicks born to breeders vaccinated with the HVT-IBD vaccine as a primer, as compared to breeders vaccinated with the inactivated vaccine alone. High level of IBD maternally-derived antibodies transmitted to the progeny by their parents induces together with an early onset of immunity by in ovo injection of a HVT-IBD vector vaccine clinical protection, as monitored on bursas, after vvIBD virus challenge.
文摘Because of their convenience, oral dosage forms are an emerging trend in companion animal formulations. Ectoparasiticides represent a significant proportion of the treatments administered to pets, and recently oral formulations have been commercialized. They have to demonstrate high palatability to ensure that they are voluntarily accepted by the animal especially because they are repeatedly offered medications. The present study aimed to compare the dog’s preference between two commercially available oral ectoparasiticide formulations containing either afoxolaner (NexGard®, Merial) or fluralaner (Bravecto®, MSD Animal Health). In two separate experiments, 225 individual dogs (115 and 110 respectively) were offered a choice of afoxolaner or fluralaner chewable tablets. The 225 dogs were given an opportunity to smell both products, and then the products were simultaneously offered to each dog by hand for 4 consecutive days with products offered from alternate hands on each day. Individual consumption and related behaviors were recorded. The same individual offered the products to the dogs throughout each study. The total number of chewable tablets for each formulation was recorded and preference was evaluated as the consumption of a given formulation during more days. A total amount of 797 tablets were consumed by the 225 dogs during the 4 days of the studies. A total of 573 (71.9%) afoxolaner chews and 224 (28.1%) fluralaner chews were consumed voluntarily. The overall consumption ratio was 2.56 to 1 for NexGard®?to Bravecto®, with significantly (p ®?than Bravecto®?on each day. As for dogs demonstrating a preference over the entire test period;83% of the dogs tested preferred NexGard®?to Bravecto®, resulting in a preference ratio of 5 to 1 for afoxolaner formulation versus fluralaner formulation. This study demonstrated that when dogs were offered a choice between the two ectoparasiticide products, a significant preference for NexGard®?was observed.
