Título:	Effect of virginiamycin and lasalocid on performance and carcass traits of holstein steers finished in feedlot systems.
Autoria:	CRUZ, C. L. dos S. RODRIGUES, L. P. SOUZA, M. R. de RAMOS, L. C. SANTOS, M. CARVALHO, I. S. de
Afiliação:	CRISTIANE LEAL DOS SANTOS-CRUZ, UNIVERSIDADE ESTADUAL DO SUDOESTE DA BAHIA; LUCIANO PEREIRA RODRIGUES, UNIVERSIDADE ESTADUAL DO SUDOESTE DA BAHIA; MATHEUS RODRIGUES DE SOUZA, CPATSA; LUANA CANDELARIA RAMOS, UNIVERSIDADE ESTADUAL PAULISTA JÚLIO DE MESQUITA FILHO; MARIANA SANTOS, UNIVERSIDADE ESTADUAL DO MATO GROSSO DO SUL; ISABELLA SILVA DE CARVALHO, UNIVERSIDADE ESTADUAL PAULISTA JÚLIO DE MESQUITA FILHO.
Ano de publicação:	2026
Referência:	In: CATAPAN, D. C. (Org.). Approaches to veterinary diagnosis. Curitiba: Europub, 2026.
Páginas:	Cap. 2, p. 21-32.
Conteúdo:	Maximizing output per unit area while shortening production cycles is essential for the economic viability of feedlot systems, particularly given the high input costs. Although feed additives are widely used to improve performance in beef cattle, limited information exists regarding their effects on dairy-origin steers. This study evaluated the impact of virginiamycin and lasalocid supplementation on the performance and carcass traits of Holstein steers in a feedlot. Thirty-six Holstein steers (82 ± 1 kg) were randomly assigned to three dietary treatments: Diet 1 (virginiamycin 27 mg/kg DM + lasalocid 30 mg/kg DM), Diet 2 (virginiamycin 10 mg/kg DM), and Diet 3 (without additives). Diets were formulated to target an average daily gain (ADG) of 1.3 kg. Steers fed Diet 1 achieved higher total weight gain (278.7 kg) and ADG (1.29 kg/day) compared to Diets 2 and 3 (P< 0.005). Diet 1 also improved feed conversion (5.51 kg DM/kg WG) and feed efficiency (0.20 kg WG/kg DM). Carcass results showed greater slaughter body weight (395.25 kg, P = 0.037) with additive use. In conclusion, combining virginiamycin and lasalocid effectively enhances growth performance, feed efficiency, and carcass productivity in Holstein steers finished in feedlot systems.
Thesagro:	Bovino Ruminante Ganho de Peso Nutrição Animal Virginiamicina Antibiótico Novilho
NAL Thesaurus:	Cattle Ruminants Weight gain Animal nutrition
Palavras-chave:	Aditivos Eficiencia alimentar Suplementação Lasalocide Segurança Metabólica Raca Holandesa
ISSN:	978-65-983230-7-3
Digital Object Identifier:	10.54750/euroed.978-65-983230-7-3_2
Tipo do Material:	Parte de livro
Acesso:	openAccess
Aparece nas coleções:	Capítulo em livro técnico (CPATSA)