Bibliographic citations
Alvarez, J., (2022). Efecto del reemplazo progresivo de Bacitracina metileno disalicilato por Enterococcus faecium sobre performance, morfometría intestinal y ósea en Broilers [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/5484
Alvarez, J., Efecto del reemplazo progresivo de Bacitracina metileno disalicilato por Enterococcus faecium sobre performance, morfometría intestinal y ósea en Broilers []. PE: Universidad Nacional Agraria La Molina; 2022. https://hdl.handle.net/20.500.12996/5484
@misc{renati/1114176,
title = "Efecto del reemplazo progresivo de Bacitracina metileno disalicilato por Enterococcus faecium sobre performance, morfometría intestinal y ósea en Broilers",
author = "Alvarez Jijón, Jim Waldir",
publisher = "Universidad Nacional Agraria La Molina",
year = "2022"
}
The study evaluated the effect of progressive replacement of growth promoting antibiotic byprobiotic on performance, intestinal and bone morphometry in broilers from 1 to 21 days. For this study, 200 Cobb 500 male BB chicks, distributed into four treatments with 10 replicates and five animals per replicate. Treatments were: T1, basal diet with BMD (500 ppm) from 1 to 21 days; T2, basal diet with BMD (500 ppm) for 1-14 days and Enterococcus faecium (17.5 ppm) for 15-21 days; T3, basal diet with BMD (500 ppm) for 1-7 days and Enterococcus faecium (17.5 ppm) for 8-21 days; T4, basal diet with Enterococcus faecium (17.5 ppm) from 1 to 21 days. Live weight, daily weight gain, feed intake and feed conversion were recorded weekly. At 21 days, one animal was sacrificed per repetition to collect histological samples of the jejunum and tibiotarsal bone. A completely randomized design was used using the ANOVA procedure and Tukey's test for comparison of means. The results showed that body weight and daily weight gain were favorable (p<0.05) for T1 compared to T2, without being different from T3 and T4. In gut morphometry T4 had greater height and villus area (p<0.05) than other treatments, while in crypt depth T1 it was lower (p<0.05) than the other treatments. In bone morphometry, no difference was reported (p>0.05) between treatments, while in bone mineralization, greater resistance to fracture was shown (p<0.05) in T4 in relation to T1, T2 and T3. Finally, the progressive replacement of antibiotic by probiotic did not show statistical differences between treatments and the exclusive treatments with antibiotic or probiotic influenced gut morphometry and resistance to fracture.
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