Efecto de la inclusión de plectranthus amboinicus en el alimento de pollos cobb 500 sobre el control bacteriano.

Abstract

This research work was carried out at the “Santa Inés” Farm located in the Faculty of Agricultural Sciences of the Technical University of Machala, Province of El Oro, Ecuador. The proposed objective was to evaluate the effect of the inclusion of dehydrated Plectranthus amboinicus in chicken feed cobb 500 on bacterial control. For this, 240 mixed chickens of the Cobb 500 line were used, using a completely random distribution (DCA) in cages, managed under strict biosecurity standards that must be kept in a poultry plant, in order to provide an adequate environment, a good temperature, diet, and adequate hydration; A basic vaccination schedule was used for the area, which consisted of the use of the Gumboro D78 and New Castle La Sota strain vaccines, with their respective revaccination in drinking water. The balance was made with raw materials from the company "BALMAR", the birds were distributed in 6 experimental groups, each with 4 replicates, and within them 10 birds, in the first treatment (T1 or control) the Growth-promoting antibiotic, in the second treatment (T2) the growth-promoting antibiotic was replaced by the dehydrated P. amboinicus in the balanced 0.25%, in the third treatment (T3) inclusion of the dehydrated P. amboinicus at 0.50% , in the fourth treatment (T4) inclusion of the dehydrated P. amboinicus at 0.75%, in the fifth treatment (T5) inclusion of P. amboinicus at 1% and T6 was the inclusion of the stem P. amboinicus at 0.10%. The variables evaluated were: Live weight of the birds (g), Cumulative feed consumption (g), Feed conversion index, Mortality (%), Total bacterial microbiota and Colimetry (CFU) and Presence of Salmonella spp. On day 35 to carry out the sacrifice, 2 animals (male and female) were taken at random for each experimental unit, obtaining a total of 48 intestines to perform the microbiological analysis. A CAMRY brand scale was used to weigh the chickens, which expresses their weight in grams, with a margin of error of ± 1g. In the statistical analysis of the data, an analysis for one factor (ANOVA) was used, for all the variables studied they were analyzed using the statistical program Statgraphics Centurión XV.I.®, in the same way, to establish the difference and its confidence intervals Fisher's multiple comparison procedure (LSD) was performed with a 95.0% confidence level. The results show that the inclusion of the dried oreganon stems and leaves (P. amboinicus) in the Cobb 500 chicken feed, both for the total bacterial microbiota and colimetry, is arithmetically speaking positive, because, the higher the percentage of the dehydrated, fewer colony-forming units, which is a possible alternative with antibacterial effect, and in terms of the results of the cultures and biochemical tests of Salmonella spp. In the birds, they did not show contamination, since no treatment registered the presence of this germ, without affecting the weight, feed consumption and feed conversion.