title: Biochemical parameters in the blood of Holstein calves given immunoglobulin Y-supplemented colostrums.
abstract: BACKGROUND
  In any calf rearing system it is desirable to obtain healthy animals, and reduce morbidity, mortality, and economic losses. Bovine syndesmochorial placentation prevents the direct transfer of bovine immunoglobulins to the fetus, and calves are born hypogammaglobulinemic. These calves therefore require colostrum immediately after birth. Colostrum is rich in immunoglobulins (Ig) and its consumption results in the transfer of passive immunity to calves. The Ig absorption occurs within the first 12 h after birth. Immunoglobulin Y (IgY), derived from chicken egg yolk, has been used in the prevention and control of diseases affecting calves because it is very similar in structure and function to immunoglobulin G (IgG). In the current study, we sought to establish whether administration routes of colostrum supplemented with avian IgY affected passive immunity in calves.
  
  
  RESULTS
  No significant differences were observed with respect to route of administration for colostrum. However, we did observe some differences in certain interactions between the various treatments. Calves fed colostrum containing egg yolk had higher levels of TP, ALB, and IgG, along with increased GGT activity.
  
  
  CONCLUSIONS
  Our results suggest that supplementing colostrum with egg yolk has a beneficial effect when given to calves, regardless of administration route.
authors.affiliation: Departamento de Clínica Veterinaria, Centro de Ciencias Agropecuarias, Universidad Autónoma de Aguascalientes, Aguascalientes, México. tquezada@correo.uaa.mx.
authors.forename: Teódulo
authors.initials: T
authors.lastname: Quezada-Tristán
authors.forename: Viridiana L
authors.initials: VL
authors.lastname: García-Flor
authors.forename: Raúl
authors.initials: R
authors.lastname: Ortiz-Martínez
authors.forename: José L
authors.initials: JL
authors.lastname: Arredondo-Figueroa
authors.forename: Leticia E
authors.initials: LE
authors.lastname: Medina-Esparza
authors.forename: Arturo G
authors.initials: AG
authors.lastname: Valdivia-Flores
authors.forename: Ana L
authors.initials: AL
authors.lastname: Montoya-Navarrete
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001798:Blood Proteins / Q000378:metabolism; D002417:Cattle / Q000097:blood* / Q000276:immunology; D003126:Colostrum / Q000737:chemistry*; D004032:Diet / Q000662:veterinary*; D004530:Egg Yolk / Q000737:chemistry; D005260:Female; D007074:Immunoglobulin G / Q000097:blood; D007136:Immunoglobulins / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology*; D010929:Placentation / Q000276:immunology / Q000502:physiology; D011247:Pregnancy; D012709:Serum Albumin; D014166:Transferases / Q000097:blood / Q000378:metabolism
chemical_list: D001798:Blood Proteins; C016512:IgY; D007074:Immunoglobulin G; D007136:Immunoglobulins; D012709:Serum Albumin; D014166:Transferases