Effect of three conservation methods on colostrum quality of Bos indicus females.
Date
2019-06-26
Authors
Usuga Suárez, Alexandra
Arroyave Zabala, Dana Mildred
Ceballos Medina, Luisa Fernanda
Vallejo Hernández, David
Vera Ramírez, Wendy Johanna
Rojano, Benjamin Alberto
Journal Title
Journal ISSN
Volume Title
Publisher
CES
Abstract
Maternal colostrum provides the neonate with immunoglobulins essential for passive immunity.
However, storage and handling of colostrum can alter its physical and nutritional characteristics.
The aim of this study was to evaluate three methods for conservation of Bos indicus colostrum.
Colostrum samples were collected from 15 Bos indicus females. Colostrum was divided into three
aliquots to be conserved with three methods: refrigeration at 4°C, freezing at -20°C and
lyophilization. In each method, five evaluation times were performed: day 0, 5, 10, 15 and 20 for
refrigeration and day 0, 15, 30, 45 and 60 for freezing and lyophilization. pH and density analyzes
were performed at all times for all methods. On day 15 of conservation, analysis of total antioxidant
capacity, lipid and protein peroxidation were carried out. A generalized linear model (GLM), Tukey
test for comparison of means and a Pearson correlation analysis were performed. A decrease in
refrigerated colostrum pH was found on day 15 (p <0.05). Density of lyophilized colostrum
decreased in all measuring times compared to frozen colostrum (p <0.05). Lyophilization showed a
lower PP of the samples, while refrigeration presented the highest values of LP and PP (p <0.05).
No difference in colostrum TAC according to the storage method was observed. A positive
correlation (p <0.05) between PP and colostrum density and a negative correlation (p <0.05)
between colostrum density and its TAC were found. It is concluded that lyophilization is a good
method of conservation of bovine colostrum since it reduces the oxidation of proteins.
Description
Keywords
Bovine, Colostrum, Oxidation