Santos Bruna Parapinski, Lisbôa Júlio Augusto Naylor, Bessegatto José Antônio, Montemor Carlos Henrique, Paulino Lais Resende, Alfieri Amauri Alcindo, Weese J Scott, Costa Marcio Carvalho
Department of Veterinary Clinical Studies (Santos, Lisbôa, Bessegatto, Montemor, Paulino) and Department of Preventive Veterinary Medicine (Alfieri, Costa), Universidade Estadual de Londrina, Londrina, Paraná, Brazil; Department of Pathobiology, University of Guelph, Guelph, Ontario (Weese); Department of Veterinary Biomedical Sciences, University of Montreal, Saint-Hyacinthe, Quebec (Costa).
Can J Vet Res. 2024 Oct;88(4):114-122.
Growth-promoting antibiotics have been used in cattle, but concern about antimicrobial overuse has prompted a re-evaluation of this practice. To evaluate changes in the ruminal microbiota of feedlot cattle by virginiamycin, a total of 76 crossbreed beef cattle from 2 batches of cattle at different sampling periods (B1 and B2) were divided into 2 groups: one receiving virginiamycin in their diet (ATB) and the other receiving the same diet without any growth promoter (CON). The use of virginiamycin was associated with significant changes in the diversity and composition of the ruminal microbiota of cattle in B1, but not in cattle in B2. Several bacterial taxa were significantly more abundant in samples from CON, ., an unclassified genus of the TM7 phylum, whereas others were associated with the use of virginiamycin, and spp. In conclusion, virginiamycin can affect bacterial diversity and composition in the rumen of feedlot cattle, but its effect is inconsistent in different seasons of the year.
促生长抗生素曾被用于牛的养殖，但对抗菌素过度使用的担忧促使人们对这种做法进行重新评估。为了评估维吉尼亚霉素对饲养场肉牛瘤胃微生物群的影响，在不同采样期（B1和B2）从两批牛中选取了76头杂交肉牛，分为两组：一组在日粮中添加维吉尼亚霉素（ATB），另一组在相同日粮中不添加任何生长促进剂（CON）。在B1组中，维吉尼亚霉素的使用与肉牛瘤胃微生物群的多样性和组成的显著变化有关，但在B2组中则没有。在CON组的样本中，有几种细菌类群的丰度显著更高，例如TM7门的一个未分类属，而其他一些则与维吉尼亚霉素的使用有关，如 和 属。总之，维吉尼亚霉素会影响饲养场肉牛瘤胃中的细菌多样性和组成，但其效果在一年中的不同季节并不一致。
