Virginiamycin
Mostrando 1-12 de 48 artigos, teses e dissertações.
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1. Virginiamycin and sodium monensin supplementation for beef cattle on pasture
RESUMO Objetivou-se avaliar o efeito da inclusão dos aditivos virginiamicina (VM), monensina sódica (MON) e associação (VM+MON) no suplemento energético-mineral sobre o consumo e desempenho de bovinos manejados em pastagem de Urochloa Brizantha cv. Marandu. Foram utilizadas 40 novilhas Nelore com 24 meses de idade e peso corporal (PC) inicial médio de
Arq. Bras. Med. Vet. Zootec.. Publicado em: 13/12/2019
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2. Effects of antibiotic growth promoters mixed with mineral supplement on growth performance, ingestive behavior, and mineral intake of grazing bulls
ABSTRACT The objective was to evaluate the addition of antibiotic growth promoters to free-choice mineral supplement on ingestive behavior, mineral intake, and growth performance of grazing bulls. Sixty Nellore bulls [initial body weight (BW) of 219±17.8 kg and 15±2 months of age] were divided in 12 marandu grass paddocks. The treatments were: mineral supp
R. Bras. Zootec.. Publicado em: 29/07/2019
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3. USE OF VIRGINIAMYCIN AND SALINOMYCIN IN THE DIET OF BEEF CATTLE REARED UNDER GRAZING DURING THE RAINY SEASON: PERFORMANCE AND RUMINAL METABOLISM
Resumo O rúmen é o órgão mais estudado no que se refere à interação simbiótica entre hospedeiro e a microbiota do trato digestivo dos ruminantes. Assim, objetivou-se avaliar os efeitos da inclusão de virginiamicina e de salinomicina ao suplemento para bovinos de corte com dieta de gramínea tropical no período das águas. Foram constituídos três
Ciênc. anim. bras.. Publicado em: 29/04/2019
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4. Efficacy of virginiamycin for the control of periodontal disease in calves
RESUMO: As doenças periodontais são processos infecciosos multifatoriais causados por complexos de micro-organismos, que provocam danos à saúde, produção e ao bem-estar animal. O objetivo do presente estudo foi o de avaliar a eficácia da virginiamicina na prevenção e controle de duas formas de doença periodontal; a gengivite e a gengivite necrosant
Pesq. Vet. Bras.. Publicado em: 2019-02
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5. Inclusion of Moringa Leaf Powder (Moringa oleifera) in Fodder for Feeding Japanese Quail (Coturnix coturnix japonica)
ABSTRACT This research evaluated the nutritional, nutraceutical, antimicrobial, as well as the growing promoter effect of Moringa oleifera (MOR) leaves flour in fodders for fattening Japanese quails. The antimicrobial activity was measured using the method of Kirby-Bauer. A completely random design with 4x2 factorial arrangement was used, fodders included 0,
Rev. Bras. Cienc. Avic.. Publicado em: 2018-03
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6. Salinomycin and virginiamycin for lactating cows supplemented on pasture
Animals on pasture generally show higher feed efficiency as a result of the use of antibiotics. This study evaluated the effect of the antimicrobials salinomycin and/or virginiamycin on production and the ruminal parameters of supplemented dairy cows grazing on Panicum maximum cv. Tanzania. Twelve Holstein/Zebu multiparous cows were used, distributed in thre
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-08
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7. Combined use of ionophore and virginiamycin for finishing Nellore steers fed high concentrate diets
Zebu cattle fed high concentrate diets may present inconsistent performance due to the occurrence of metabolic disorders, like acidosis. The isolated use of ionophores and virginiamycin in high grain diets can improve animal performance and reduce the incidence of such disorders, but recent studies suggested that their combination may have an additive effect
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-08
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8. Avaliação de antimicrobianos como promotores de crescimento via mistura mineral para bovinos de corte em pastejo / Antimicrobial growth promoters in mineral mixtures for grazing beef cattle
Antimicrobials which modifies rumen fermentation can improve economical efficiency of beef cattle grazing systems and reduce its possible impacts on the environment. It was conducted a series of experiments with the objective of evaluating free-choice mineral mixtures as an antimicrobial delivery system for grazing animals. On experiment 1, at Piracicaba-SP,
Publicado em: 2011
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9. Uso de virginiamicina em equinos mestiços submetidos a dietas com alto teor de carboidratos / Use of virginiamycin in horses crossbred submitted to the diet with high carbohydrate content
Foram utilizados seis equinos, fêmeas hígidas, adultas, 3/4 e 1/2 sangue Bretão, com média de peso de 400 kg em um delineamento experimental quadrado latino 3 X 3, com o objetivo de determinação dos níveis de virginiamicina no controle de parâmetros fisiológicos e hematológicos dos animais tratados com concentrados com alto teor de carboidratos. Os
Publicado em: 2009
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10. Combined use of ionophore and virginiamycin in confined Nellore steers fed high concentrate diets / Uso combinado de ionóforo e virginiamicina em novilhos Nelore confinados com dietas de alto concentrado
Zebu cattle fed high concentrate diets may present metabolic disorders, such as ruminal acidosis and liver abscesses. Also these animals display inconsistent performances in high starch diets. The use of feed additives such as ionophores and virginiamycin has been thoroughly investigated and the results are very consistent, with improvements in performance,
Publicado em: 2008
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11. Gene Replacement Analysis of the Streptomyces virginiae barA Gene Encoding the Butyrolactone Autoregulator Receptor Reveals that BarA Acts as a Repressor in Virginiamycin Biosynthesis
Virginiae butanolides (VBs), which are among the butyrolactone autoregulators of Streptomyces species, act as a primary signal in Streptomyces virginiae to trigger virginiamycin biosynthesis and possess a specific binding protein, BarA. To clarify the in vivo function of BarA in the VB-mediated signal pathway that leads to virginiamycin biosynthesis, two bar
American Society for Microbiology.
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12. Stereospecific reduction of virginiamycin M1 as the virginiamycin resistance pathway in Streptomyces virginiae.
In a cell extract of Streptomyces virginiae, virginiamycin M1 was inactivated in the presence of NADPH, while virginiamycin S remained intact. The inactivated product of virginiamycin M1 was isolated, and structure analysis revealed that the inactivation involves reduction of a C-16 carbonyl group leading to the formation of 16-dihydrovirginiamycin M1. Aceto