Tesis Medicina Veterinaria
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Item Efecto del Rhodobacter Sphaeroides sobre los índices productivos y digestibilidad aparente en pollos de engorde(2025-02) Maliza Pacha Nelly Elizabeth; Guerrero López Jorge RicardoThe objective of this study was to evaluate the addition of Rhodobacter Sphaeroides in different doses on the productive índices and the apparent digestibility of nutrients. For this purpose, four treatments werw used; T0 control group without the addition of R. Shpaeroides; 1 ml of R. Shpaeroides; T2 with 2 ml of R. Shpaeroides and T3 with 3 ml of R. Shpaeroides per liter of wáter. For the study, 200 one- day- old male and female broiler chickens of the Cobb 500 line were used. Through a completely randomized design with 10 repetitions per treatment and 5 animals per repetition. The data obtained were evaluated with the Infostat statistical program using the Tukey test with a significance leve lof 95 %. The productive period was divided into four stages: initial (0- 10 days); growth (11- 22 days); finisher I (23- 42 days) and finisher II (43- final), while the evaluation of the apparent digestibility of nutrients was carried out in a periodo f 35- 42 days of age. Regarding the results, T3 presented better result in terms of final weight (3052.29 g); weight gain (3012.61 g) and European Efficiency Index (318.72), while feed consumption (g) anda feed conversión index did not present significant differences (P< 0.05). Regarding the apparent digestibility of nutrients, there were no major significant differences (P> 0.05).Item Efecto de la harina de cúrcuma (Cúrcuma longa) y romero (Rosmarinus officinalis) en los índices productivos y coccidiosis en pollos de engorde(2024-08) Medina Vera, Pamela Alexandra; Guerrero López, Jorge RicardoThe objective of this study was to evaluate the addition of turmeric (C. longa) and rosemary (R. officinalis) in different doses, on the productive indices and the oocyst count of Eimeria spp, for this we worked with nine treatments, each combined according to the established dose, being for C. longa (0, 0.02, 0.05 %) and R. officinalis (0, 0.05, 0.1 %) respectively. For the study, 270 one-day-old Cobb 500 mixed chickens were used. By means of the completely randomized DCA design with factorial arrangement with 3 replicates for each treatment and 10 animals per repetition. The data were evaluated with the statistical program Infostat by means of the Tukey test at a significance level of 95%. The analysis was carried out in three different stages (initial, growth and fattening) respectively, while the measurements for the evaluation of oocysts of Eimeria spp were carried out in 3 periods (27, 35 and 48 days of age) respectively. Regarding the results, there were no significant differences greater than (P>0.05) in the production indices: Final weight (g), Weight gain (g), Feed intake (g), AQI (g/g), IEE, Mortality %, Cost/Benefit (C/B). In relation to the evaluation of oocysts of Eimeria spp., statistical differences could be observed in the intake at 48 days of age, the treatment that obtained a better result was T5 with an average of 29.17 oocysts/g of feces.Item Evaluación del butirato de sodio sobre los índices productivos y morfometría de las vellosidades intestinales en pollos de engorde(2024-08) Izurieta Buenaño, Sofía Anahí; Guerrero López, Jorge RicardoThe present research project evaluated the effects of sodium butyrate (SB) on productive indices and intestinal (duodenal) villi morphometry in broilers. A total of 400 one-day-old Cobb 500 male chickens were divided into 5 treatment groups, each with 4 replicates, in a completely randomized design; The diets were formulated as follows: T0 (-) (control), T1 (0.05% BS), T2 (0.10% BS), T3 (0.15% BS) and T4 (+) (0.05% flavomycin). During the entire experimental period (42 days), inclusive, in the 4 evaluation phases (pre-initial, initial, fattening and finishing), the chickens did not show statistically significant differences between treatments (p>0.05) on the productive indices (final weight, weight gain, feed consumption and feed conversion ratio); Similarly, no statistically significant differences (p>0.05) were found for the variables crypt depth, duodenal villus length and width on days 21 and 35. However, according to the cost: benefit (C/B) ratio, T1 and T3 showed a higher profit (9 cents per dollar invested), followed by T0 (6 cents), T4 (3 cents) and T2 (2 cents). In conclusion, the addition of BS does not improve the productive indices and duodenal villus morphometry of Cobb 500 chickens, although it is estimated that it shows a greater economic benefit.Item Efecto del ajo (Allium Sativum) sobre los índices de producción y Eimeria spp en pollos de engorde(2024-02) Rojas Chunio, Nataly Tatiana; Guerrero López, Jorge RicardoThe aim of this study was to analyze different percentages of addition garlic (A. Sativum) in different doses on the productive indexes and the oocyst count of Eimeria spp, for which four treatments were used: T0: control without addition of (A. Sativum); T1: with 0.15% of (A. Sativum); T2: with 0.25% of (A. Sativum) and T3: with 0.3% of (A sativum). It was evaluated in 160 broilers of the cobb 500 line, one day old. By means of an experimental design with 4 replicates by treatment and 10 animals by replicate, the data obtained were evaluated with Tukey’s statistical test with a significance level of 95% using InfoStat as the statistical program. The productive period was divided into three stages: Initial (8-12 days); Growth (13-28 days) and Fattening (29-49 days) while samples were taken to count oocyts of Eimeria spp on days 35 and 49, for which 10 animals by treatment were sacrificed to obtain fecal samples directly from the intestine, which were evaluated in the laboratory with the floatation technique an the McMaster chamber. The best results were obtained with the T3 treatment with the addition of (3%) of (A. Sativum), finding better results in productive indexes with a weight gain of (2411.98 g) and a feed conversion of (2.08). It also showed a lower quantity of oocysts by g/feces and a good cost/benefit of 1.20. Key words: broilers, A. Sativum, productive indexes, Eimeria spp.