Tesis Medicina Veterinaria y Zootecnia

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    Efecto del polen, lactosa y su combinación en los órganos inmunes y sobre las poblaciones microbianas cecales de pollos broilers
    (2019-03) Chico Robalino, Carlos Gustavo; Montero Recalde, Mayra Andrea
    In the present investigation, the effect of pollen, lactose and its interaction on lymphoid organs and cecal microbial population in broilers of Cobb 500 genetic line was evaluated. The study was carried out preparing four diets, the first T0 without any additive, the second T1 with 0.5% pollen, the third T2 with 2.5% lactose and finally the fourth T3 with the combination of the two aforementioned additives and at the same concentration. The experimental diets were administered only during the first two stages of development (pre-initial and initial). 40 animals were used for the analysis, with 10 experimental units for each diet. On day 14 an animal of each experimental unit was sacrificed to take length, weight and pH of the organs of the digestive tract. ADEVA Variance Analysis and Tukey test were used to process the data collected in relation to lymphoid organs and colony forming treatments (CFU) of the bacteria. In the study of the morphometric indices (I.M.), significant differences were found between the means of the treatments in the I.M. Bursa (P = 0.0199), where the best treatment was T1 (0.5% pollen). In the case of I.M. Spleen and I.M. Thymus, no statistical significance was observed between the means of the treatments (P> 0.05) respectively. As for the relationship between organs like; Bursa / Spleen, Bursa / Timo and Timo / Spleen, no statistical difference was found for any treatment (P> 0.05). Within the colony forming units, for enterobacteria, statistical significance was observed between treatments (P <0.05), being the best T2 (2.5% lactose), while for UFC of E. coli it was observed that both T2 (2.5% lactose) and T3 (0.5% pollen + 2.5% lactose) acted in a similar way reducing their number in the cecum.