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- W4386570286 abstract "Probiotics are widely used as feed supplements in the poultry industry to promote growth and performance in chickens. Specifically, this supplementation starts around the time of lay and continues through the production cycle in laying hens. However, the embryonic period is critical to the growth and development of metabolically active organs thereby influencing subsequent health and productivity in adult birds. Therefore, the present study investigated the potential use of probiotics to promote embryonic growth in layers. Further, a pilot grow-out study was conducted to evaluate the effect of in ovo and in-feed probiotic application on pullet growth. For the study, fertile White Leghorn eggs were sprayed with phosphate buffered saline (control; CON) or probiotic cocktail (IO; Lactobacillus paracasei DUP 13076 and L. rhamnosus NRRL B 442) prior to and during incubation. The embryos were sacrificed on day 7, 10, 14 and 18 of incubation for embryo morphomtery. On day 18, remaining eggs were set in the hatcher to assess hatchability and hatchling morphometry. For the pullet trial, hatchlings were raised on feed with or without probiotics until week 5. Pullets were sacrificed weekly, and morphometric parameters were recorded. Results of our study demonstrate that in ovo probiotic application significantly improved relative embryo weight, crown rump length, hatchability and hatchling weight when compared to the control (P < 0.05). Further, this enhanced embryonic development was associated with a concomitant increase in post-hatch growth. Specifically, pullets raised from probiotic-sprayed eggs had significantly improved crown-rump length, tibial length, tibial bone weight and body weight when compared to the control (P < 0.05). Moreover, among the different treatment schemes employed in this study [CON (no probiotics), in-feed only (IF), in ovo only (IO) and in ovo and in-feed probiotic supplementation (IOIF)], sustained probiotic supplementation (IOIF) was found to be the most effective in promoting growth. Therefore, in ovo and in-feed probiotic supplementation could be employed to promote embryo and pullet growth to support subsequent performance in layers." @default.
- W4386570286 created "2023-09-10" @default.
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- W4386570286 date "2023-12-01" @default.
- W4386570286 modified "2023-10-07" @default.
- W4386570286 title "In ovo and in feed probiotic supplementation improves layer embryo and pullet growth" @default.
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- W4386570286 doi "https://doi.org/10.1016/j.psj.2023.103092" @default.
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