title: Evaluation of quality, quantity, and timing of colostrum feeding on immunoglobulin G1 absorption in Jersey calves.
abstract: Twenty-four Jersey calves were randomly assigned to 1 of 4 treatment groups (6 calves per group). Pooled colostrum from first milkings (colostrum high in IgG1, 84 mg/mL) of multiparous cows was fed to treatment groups 1 and 2. Pooled colostrums from second and third milkings (colostrum low in IgG1, 31.2 mg/mL) of multiparous Jersey cows were fed to calves in treatment groups 3 and 4. The quality and timing of colostrum feeding was as follows: group 1 were fed (high IgG1 colostrum) 4 L at 0 h (birth); group 2 calves were fed (high IgG1 colostrum) 2 L at 0 h (birth) and 2 L at 12 h; group 3 calves were fed (low IgG1 colostrum) 4 L at 0 h (birth); and group 4 calves were fed (low IgG1 colostrum) 2 L at 0 h (birth) and 2 L at 12 h. Mean serum Ig() was 38.66, 45.66, 13.81 and 9.95 mg/mL in groups 1 to 4, respectively. At 48 h of age, calves fed colostrum with higher concentrations of total ingested IgG1 (groups 1 and 2) had significantly higher serum protein and IgG1 concentrations than calves fed low IgG1 colostrum at 48 h of age (groups 3 and 4). Mean apparent efficiency of IgG1 absorption was measured at 48 h; calves (group 2) receiving 2 L at birth and 2 L at 12 h of high IgG1 colostrum had higher mean apparent efficiency of IgG1 absorption than calves (group 4) fed 2 L of colostrum that was low in IgG1 at birth and 12 h (31.2 and 18.2% in groups 2 and 4, respectively). Results suggest that Jersey calves should receive 2 separate feedings of high quality colostrum to maximize the colostral IgG1 absorption.
authors.affiliation: Dairy Science Department, California Polytechnic State University, San Luis Obispo, 93407, USA. ejaster@CalPoly.edu
authors.forename: E H
authors.initials: EH
authors.lastname: Jaster
mesh_terms: D000042:Absorption; D000818:Animals; D000831:Animals, Newborn / Q000276:immunology / Q000378:metabolism; D001798:Blood Proteins / Q000032:analysis; D002417:Cattle / Q000276:immunology / Q000378:metabolism*; D003126:Colostrum / Q000276:immunology*; D007116:Immunization, Passive; D007074:Immunoglobulin G / Q000008:administration & dosage / Q000097:blood / Q000378:metabolism*; D007774:Lactation; D013997:Time Factors
chemical_list: D001798:Blood Proteins; D007074:Immunoglobulin G