Addition of a blend based on an emulsifier, monolaurin, and glycerides of butyric acid in broiler chicken feed to replace conventional antibiotics, improves performance and reduces fecal Escherichia coli counts
DOI:
https://doi.org/10.33448/rsd-v11i3.25537Palavras-chave:
Antimicrobiano; Ácido butírico; Lisolecitinas.Resumo
Brazil is the largest exporter and the third largest producer of chicken meat. However, this activity presents some challenges, the most recent being the banned usage of antimicrobials as growth promoters. The aim of this study was to evaluate whether the addition of a blend (lysolecithins, butyric acid glycerides and lauric acid glycerides) in broiler feed could improve performance, health, meat quality, as well as antimicrobial and coccidiostatic capacity in order to replace conventional growth promoters. Broiler chickens (n=180) were divided into three groups with four replicates per group as follows: positive control - PC (enramycin: 10 mg/kg; coccidiostatic/salinomycin: 64 mg/kg, 1 to 35 days); negative control - NC (basal diet, without antimicrobials); blend - FDH (1 kg/ton, 1 to 42 days). The zootechnical performance was measured on days 1, 14, 21, 35 and 42. Fecal samples were collected for parasitological and bacterial analysis on days 21 and 42. At 42 days, four birds per treatment were euthanized for analysis of meat quality and intestinal morphology. At 42 days, a higher body weight and weight gain, in addition to better feed conversion were observed in the FDH and PC groups compared to the NC group (P = 0.001). The productive efficiency index was higher in the PC and FDH treatments compared to NC. Escherichia coli count and total coliform count in the PC and FDH groups were lower compared to NC (P < 0.05) on day 42 of the experiment. Eimeria spp. counts in the feces of FDH birds were lower compared to NC, in contrast to PC (P = 0.047). The villous:crypt ratio was higher in NC followed by FDH as compared to PC (P = 0.001). It is concluded that the use of the blend improved weight gain, body weight and feed conversion, in addition to providing a greater villous:crypt ratio and enhancing coccidiostatic and antimicrobial action. Therefore, the blend demonstrated high potential for replacement of growth promoters in the diet of broilers chickens.
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Copyright (c) 2022 Maiara Sulzbach Marchiori; Charles Marcon Giacomelli; Maksuel Gatto de Vitt; Cleiciane Rita; Gabriela Miotto Galli; Marcel Manente Boiago; Ricardo Evandro Mendes; Lenita Moura Stefani; Aleksandro Schafer da Silva
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