Autor(es)

Tomaluski, Cristiane Regina ; Coelho, Marina Gavanski ; de Toledo, Ariany Faria ; Virginio Junior, Gercino Ferreira ; da Silva, Ana Paula ; Donde, Sophia Cattleya ; Machado Bittar, Carla Maris

• Tipo de documento: Artigo Científico
• Fonte: LIVESTOCK SCIENCE; v. 258, p. 10-pg., 2022-02-24.

Resumo

When fresh maternal colostrum (FMC) is not available, frozen colostrum (FC) or colostrum replacer (CR) are alternatives to avoid failures of passive immune transfer (FPIT). The present study aimed to evaluate the use of different colostrum sources and their effects on passive transfer (PT), health, performance, and metabolism of Holstein's calves. Therefore, 39 calves were distributed into three experimental groups: 1) 10% of body weight (BW) in high-quality FMC; 2) 10% of BW in high-quality FC; 3) 1.5 doses of CR (705 g). All animals received colostrum within two hours after birth. The experimental period was 63 days. The intake of starter concentrate, health, growth, and metabolite parameters were monitored. Treatments influenced immunoglobulins' intake and serum IgG concentration at 24 h. In the first 48 h, the insulin concentration was higher in animals CR-fed. The average number of disease episodes, ADG, and feed efficiency differed among the experimental groups, also influencing the bodyweight at the end of the experiment, with lower values for calves fed CR. In conclusion, although all colostrum sources resulted in efficient PT, those that allowed ingestion of more significant amounts of immunoglobulins provided higher serum IgG levels, better health conditions, and more significant gain and performance. (AU)

• Processo FAPESP: 17/13601-3 - Efeito de diferentes manejos alimentares no microbioma, metabolismo, saúde e desempenho de bezerros leiteiros
• Beneficiário: Carla Maris Machado Bittar
• Modalidade de apoio: Auxílio à Pesquisa - Regular