Débora Cristina Nichelle Lopes

Uso de cal virgem para o controle de Salmonella spp. e Clostridium spp. em camas de aviário

This study aimed to evaluate the efficacy of quicklime (CaO) for reducing Salmonella and Clostridium spp. population in used litter from floor pens of broilers. Four treatments were tested: (T1) control (without quicklime); (T2) 300g quicklime m-2; (T3) 600g quicklime m-2; and (T4) 900g quicklime m-2. The following average pH values were observed 12 days after adding quicklime: 8.95, 9.91, 10.75 and 11.11 for treatments 1, 2, 3 and 4, respectively. An 82 and 97% reduction in the most probable number Log10 (CFU) of Salmonella and Clostridium spp, respectively, was observed when 300g m-2 of quicklime was added to the used litter from floor pens of broilers. Additionally, a 100% reduction was obtained when both 600 and 900g m-2 of quicklime were added, differing significantly from control (before adding quicklime). A progressive reduction in water activity (from 0.2 to 3.82%) was observed when growing levels of quicklime were used. In conclusion, even the lowest level of quicklime added to litter from floor pens of broilers reduces the most probable number of Salmonella and Clostridium spp.

Replacing soybean oil with increasing levels of soybean acid oil in diets of coturnix quails (Coturnix coturnix coturnix) and the effects on egg quality

The effects of increasing levels of soybean acid oil in diets of quails on the quality of eggs were evaluated over a period of 56 days. A completely randomized design with five treatment levels of soybean acid oil (0, 2, 4, 6, and 8%) as a replacer for soybean oil and eight replicates of two quails each were used. A total of 240 fresh eggs were used for quality analysis, and 400 eggs were stored at 23ºC over a period of 0, 7, 14, 21, and 28 days for analysis of shelf-life. Polynomial regression and ANOVA with repeated measurements and Tukey´s tests were used. Soybean acid oil linearly increased the intensity of red (a* = -5.26 + 0.14 x, R2 = 0.89, P = 0.01) and yellow (b* = 42.32 + 0.44 x, R2 = 0.88 P = 0.01). All other variables of egg quality were not affected by the treatments, with the exception of sensory attributes, such as odor and aftertaste, which were more pronounced with soybean acid oil. In conclusion, soybean acid oil affects the intensity of yellow and red color of the yolk. Trained assessors detected differences in odor and aftertaste of eggs when soybean acid oil was included in the quail diet.

Morfometria intestinal em codornas de corte alimentadas com treonina digestível

The aim of the study was to evaluate intestinal morphology data by including different levels of threonine in the diet of meat quails in the growing phase. The experimental design was completely randomized in a factorial arrangement: four nutritional levels and three intestinal segments with ten repetitions. Samples were collected to obtain morphometry data (villi and crypt) of the three segments of the small intestine (duodenum, jejunum, and ileum). In the study of the intestinal villus height a highly significant interaction was obtained for all ages studied. A crypt depth was evidenced at 42 days with a significant interaction between levels of inclusion of threonine in the diet and small intestine. In the study of the relationship villus height and depth crypt quails at 21 days of age, the results were significant for the interaction treatment (T) and part of the intestine. At 21 and 42 days of age, supplementation of 1.04 and 0.78% respectively of threonine in the diet promotes better outcomes for intestinal morphology.

Administração de antibiótico em poedeiras semipesadas durante o processo de debicagem

A debicagem e amplamente utilizada na industria avicola com os objetivos de reduzir o canibalismo e o desperdicio de racao pelas aves. O objetivo do experimento foi verificar a resposta das aves com a utilizacao de antibiotico via agua durante o processo de debicagem. Um total de 2384 poedeiras semipesadas foi submetido a debicagem aos sete dias de idade e divididos em dois grupos: T1: controle e T2: com administracao de antibiotico. Foram avaliadas as variaveis de consumo alimentar, peso corporal medio, ganho medio de peso, e conversao alimentar. Nao foi observada diferenca estatistica entre os tratamentos para nenhuma das variaveis em questao. A adminis-tracao de antibioticos nao favorece o crescimento e consumo de aves submetidas a debicagem.

Enzimas carboidrases na dieta de porcas lactantes e suas leitegadas

This research was conducted to evaluate the effect of adding enzymatic complex (EC) containing carbohydrases to diets for lactating sows and their litters. A total of 264 genetically homogeneous crossbred sows were used. They were blocked by farrowing order and randomly allotted to four treatments, in a 2 x 2 factorial arrangement (lactating diet (LD) x pre-starter diet (PD)), with two levels per factor (with or without EC). The following variables were measured in the sows: weaning weight; weaning weight variation; backfat; backfat variation; body condition; feed consumption and milk composition. The following variables were measured in the litter: feed consumption; post-natal weight; weaning weight; and average weaning weight. No interaction was found among LD and PD for any of the variables studied. Additionally, no effect was observed for either, female weight, backfat, body condition score or milk composition (fat content, crude protein, lactose and dry matter). Litter weaning weight and average litter weaning weight were higher when LD was supplemented with EC in comparison to the piglets from sows fed with diets without EC (74.6 vs 72.9kg and 6.32 vs 6.47kg, respectively). Litters from female fed with CE were 1.7kg heavier at weaning and showed a 0.15kg increase in the average weaning weight (P=0.06; P=0.07, respectively). This resulted in an estimate 2.27kg increase in the body weight at slaughter. Lactating sows fed with diets containing enzymatic complex with carbohydrases had heavier litters at weaning.