Adição de probiótico ao leite integral ou sucedâneo e desempenho de bezerros da raça holandesa

Abstract

RESUMO: A possibilidade de proibição do uso de antibióticos como promotores de crescimento para animais de produção tem feito com que consumidores e produtores procurem por alternativas. Os probióticos têm se mostrado promissores em cumprir este papel e por esta razão, setenta e nove bezerros da raça Holandesa foram utilizados para avaliar a adição de probiótico constituído por Lactobacillus acidophilus, Enterococcus faecium e Saccharomyces cerevisiae ao aleitamento. Os animais foram distribuídos em um delineamento inteiramente casualizado, com arranjo fatorial de tratamentos 3x2, correspondendo ao tipo de dieta líquida (leite integral, sucedâneo ao 3° dia ou sucedâneo ao 15° dia de idade, com adição ou não de probiótico ADDITION OF PROBIOTIC TO WHOLE MILK OR MILK REPLACER AND HOLSTEIN CALVES PERFORMANCEABSTRACT: The possibility of limiting antibiotics as growth stimulants for farm animals has produced a climate in which both consumers and manufacturers are looking for alternatives. Probiotics are being considered to exercise this role, and for this reason, 79 newborn Holstein calves were used to evaluate the effects of Lactobacillus acidophilus, Enterococcus faecium and Saccharomyces cerevisiae additions to whole milk or milk replacer. Calves were assigned at birth to a completely randomized design with a 3x2 factorial arrangement of treatments. Factors were: 1-whole milk: milk replacer at 3 days of age: milk replacer at 15 days of age; 2-probiotic supplementation or not. Animals remained on the trial until 15 days after weaning. Probiotic supplementation to calves fed milk replacer at 3 days of age improved preweaning daily body gain (with probiotic=0.22 vs. without probiotic=0.16 kg day -1 ) and feed conversion (2.62 vs. 3.85), as well as, postweaning feed conversion (1.66 vs. 2.03). Milk replacer fed calves had higher starter intake (milk replacer=0.22 vs. whole milk=0.19 kg day -1 ), but lower dry matter intake (0.61 vs. 0.67 kg day -1 ) and the lowest weight at weaning (49 vs. 59 kg). When milk replacer was started at 3 days, calves had higher starter intake (milk replacer at 3 days=0.25 vs. milk replacer at 15 days=0.20 kg day -1 ) and lower weight at weaning (47.3 vs. 51 kg) in relation to milk replacer starting at 15 days. Age at weaning and mortality rate were not affected by the probiotic supplementation or liquid diet. Key words: Lactobacillus, milk substitute, body gain, dairy calves, bovine INTRODUÇÃOOs animais saudáveis, em geral, caracterizamse por apresentar um bom funcionamento do aparelho intestinal, o que garante o equilíbrio da microbiota aí presente. Este fator é fundamental na utilização de nutrientes e para um bom desenvolvimento ou mesmo para incremento da produção. No entanto, o aparente equilíbrio do intestino pode ser quebrado, como naquelas ocasiões em que o animal fica estressado devido a agressões decorrentes do manejo, variações climáticas ou alimentação. A alteração deste equilíbrio oferece condições para que bactérias patogênicas proliferem e provoquem doenças entre as quais a ...

Performance of dairy calves fed milk, milk replacer or post-weaning concentrate with acidifiers

“…The lack of significant effect on the DM intake was also observed by Sandi & Mühlbach (2001) and Güler et al (2006), while Meyer et al (2001) and Heinrichs et al (2003) reported increase in the total DM intake with the addition of prebiotic to the liquid diet of calves.…”

Faecal culturable microbiota, growth and clinical parameters of calves supplemented with lactic acid bacteria and lactose prior and during experimental infection with Salmonella Dublin DSPV 595T

“…The level of dehydration was determined by skinfold time as suggested by Blood et al (1986). Faeces were macroscopically analyzed according 1 Data not published to the scores proposed by Meyer et al (2001) Faecal samples (approximately 5 g) were obtained from three calves of each group by rectal massage on days 1, 5, 10 and 27 of the experiment, and then weighed, diluted 1.100 -1 in Ringer ¼ solution and homogenised on a magnetic stirrer according to Frizzo et al (2011 b ). Serial dilutions of each sample were pour-plated with different media for the count of the population detailed in table 2.…”

Faecal culturable microbiota, growth and clinical parameters of calves supplemented with lactic acid bacteria and lactose prior and during experimental infection with Salmonella Dublin DSPV 595T

“…The level of dehydration was determined by skinfold time as suggested by Blood et al (1986). Faeces were macroscopically analysed according 1 Data not published to the scores proposed by Meyer et al (2001) ( Faecal samples (approximately 5 g) were obtained from three calves of each group by rectal massage on days 1, 5, 10 and 27 of the experiment, and then weighed, diluted 1.100 -1 in Ringer ¼ solution and homogenised on a magnetic stirrer according to Frizzo et al (2011 b ). Serial dilutions of each sample were pour-plated with different media for the count of the population detailed in table 2.…”