Effect of frozen storage of bovine colostrum for up to 1 year on concentrations of immunoglobulins and insulin as well as bacterial counts

JDS Communications, Год журнала: 2025, Номер 6(3), С. 406 - 410

Опубликована: Март 4, 2025

Freezing colostrum is a common management strategy to ensure availability of high-quality for each calf. Limited data are available on the effects freezing important colostral components. The objective this study was investigate bovine at −20°C 1 yr concentrations IgG, IgA, IgM, and insulin, as well total aerobic bacteria (TPC) coliform counts (TCC). Composite samples (250 mL) were collected from complete first milking Holstein cows (n = 10), immediately cooled ice, divided into fourteen 8-mL aliquots. One aliquot stored ice analysis within 6 h collection (fresh) 13 additional aliquots frozen subsequent analyses upon thawing 21°C 24°C in 4-wk intervals. All analyzed Brix % via digital refractometer; IgM radial immunodiffusion; insulin radio immunoassay; TPC TCC commercial ready-to-use bacterial culture plates. Data using mixed repeated-measures ANOVA. Compared with fresh colostrum, 4.1% ± 0.9% 6.2% lower between 4 52 wk relative samples. Concentration IgG reduced 8.1% 2.8%, 7.6% 2.5%, 8.2% 2.3% 32, 44, 48 sampling, respectively. did not affect IgA or IgM. Insulin 14.5% 3.5% 16 wk, 11.1% 3.0% 40 18.4% 3.3% 20.8% 3.2% sampling compared concentration determined colostrum. Coliform count 22.1% by continued be time point through wk. Total plate 4, 20, 24 46.9% (30.9%–71.4%), 47.9% (31.5%–72.9%), 51.0% (33.3%–78.1%) but differ other points. We conclude that appeared %, TCC, insulin. As such, producers should store no longer than 32 minimize risk change composition.

Язык: Английский

The diagnostic accuracy of the Brix refractometer in determining mare colostrum with high and low immunoglobulin G concentrations

Journal of Equine Veterinary Science, Год журнала: 2025, Номер unknown, С. 105417 - 105417

Опубликована: Март 1, 2025

Язык: Английский

Advancements in the Exploration and Application of Turbidimetric Assays for Biochemical Analysis

TrAC Trends in Analytical Chemistry, Год журнала: 2025, Номер unknown, С. 118333 - 118333

Опубликована: Июнь 1, 2025

Язык: Английский