165770 20260123143856.0 sideral 56062 ART-2005-56062 eng Conesa, C. (orcid)0000-0003-0862-9893 Determination of IgG levels in bovine bulk milk samples from different regions of Spain. 2005 Access copy available to the general public Unrestricted Colostrum addition to milk for consumption is an unlawful practice. Furthermore, the higher whey protein/casein ratio of colostrum compared with milk causes severe technological problems. A high concentration of immunoglobulins has been generally accepted as an index of colostrum presence in milk. In this work, the levels of IgG have been determined by a non-competitive ELISA in 3,248 bulk bovine milk samples from different regions of Spain throughout one year. The mean value for IgG concentration obtained from all the samples was 0.257€0.122 mg/ml, within the range generally considered as acceptable for mature milk. The mean concentration obtained for all the samples collected in the spring was 0.288€0.125 mg/ml, significantly higher than the values found at the other seasons. The finding of some samples with very high values of IgG would suggest that the determination of immunoglobulin levels periodically would be a good parameter to control milk quality. info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.173 2005 FOOD SCIENCE & TECHNOLOGY 24 / 93 = 0.258 2005 Q2 T1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Lavilla, M. Sanchez, L. Universidad de Zaragoza (orcid)0000-0001-5964-823X Perez, M. D. Universidad de Zaragoza (orcid)0000-0003-2555-8425 Mata, L. Universidad de Zaragoza Razquin, P. Calvo, M. Universidad de Zaragoza (orcid)0000-0001-5373-9210 2008 780 Universidad de Zaragoza Dpto. Produc.Animal Cienc.Ali. Área Tecnología de Alimentos 220 (2005), 222-225 Eur. Food Res. Technol. European Food Research and Technology 1438-2377 542668 http://zaguan.unizar.es/record/165770/files/texto_completo.pdf Postprint 431880 http://zaguan.unizar.es/record/165770/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:165770 articulos driver 2026-01-23-14:37:13 ARTICLE