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dc.creatorElizondo Salazar, Jorge Alberto
dc.creatorJayarao, Bhushan M.
dc.creatorHeinrichs, Arlyn Jud
dc.date.accessioned2022-08-25T14:28:23Z
dc.date.available2022-08-25T14:28:23Z
dc.date.issued2010
dc.identifier.citationhttps://www.sciencedirect.com/science/article/pii/S0022030210000639es_ES
dc.identifier.issn0022-0302
dc.identifier.urihttps://hdl.handle.net/10669/87245
dc.description.abstractA study was conducted to identify the optimal temperature and time at which heat treatment of bovine colostrum would least change viscosity and IgG concentrations yet reduce bacterial count. First-milking colostrum with >50 g of immunoglobulins/L (measured by colostrometer) was collected from 30 Holstein cows. Aliquots of colostrum were heated for 0, 30, 60, or 90 min at 57, 60, or 63°C in a water bath. Samples were examined for viscosity, IgG1, and IgG2 concentrations, standard plate count, coagulase-negative staphylococci, environmental streptococci, coliform, gram-negative noncoliform, Streptococcus agalactiae, and Staphylococcus aureus counts. All heat treatments reduced counts of all bacteria groups measured compared with untreated colostrum samples. Heat treatment at ≥60°C denatured IgG1 compared with untreated colostrum; however, colostral IgG2 levels were not reduced when temperature was held at 60°C for <60 min. Viscosity was not affected when temperature was held at 60°C for <60 min. In this study, heat treatment of bovine colostrum at 60°C for 30 or 60 min reduced bacterial count, slightly reduced IgG concentration, and did not affect viscosity.es_ES
dc.language.isoenges_ES
dc.sourceJ. Dairy Sci, 93, p. 961–967.es_ES
dc.subjectCalfes_ES
dc.subjectImmunoglobulin Ges_ES
dc.subjectPasteurized colostrumes_ES
dc.titleEffect of heat treatment of bovine colostrum on bacterial counts, viscosity, and immunoglobulin G concentrationes_ES
dc.typeartículo científicoes_ES
dc.identifier.doi10.3168/jds.2009-2388
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Agroalimentarias::Estación Experimental de Ganado Lechero Alfredo Volio Mata (EEAVM)es_ES


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