000169913 001__ 169913
000169913 005__ 20260306154908.0
000169913 0247_ $$2doi$$a10.3390/dairy7010010
000169913 0248_ $$2sideral$$a148450
000169913 037__ $$aART-2026-148450
000169913 041__ $$aeng
000169913 100__ $$aLuño, Victoria
000169913 245__ $$aPreliminary Study of Microbiological and Immunological Quality of Sheep Colostrum: Influence on Early Postnatal Weight Change
000169913 260__ $$c2026
000169913 5060_ $$aAccess copy available to the general public$$fUnrestricted
000169913 5203_ $$aColostrum is crucial for the survival, development, and the future productivity of newborns. In this study, we evaluated the immunological and microbiological quality of colostrum in 28 Rasa Aragonesa ewes and its relationship with offspring growth during the first 48 h postpartum. Colostrum samples were collected by hand milking immediately after parturition. Immunoglobulin concentration was assessed using Brix refractometry and the samples were categorised according to their immunoglobulin content: high (>24 Brix value), medium (19–23 Brix value), and low (<19 Brix value). Bacterial counts of aerobes and coliforms were determined with the 3M Petrifilm™ system and the weight of the lambs was recorded using a digital suspension scale. The mean aerobic count (AC) was 3.63 ± 0.69 log10 CFU/mL after 24 h of incubation and the mean coliform count (CC) was 1.59 ± 0.82 log10 CFU/mL after 24 h of incubation. Colostrum with a high immunoglobulin concentration had lower aerobic count after 48 h of incubation than that with poor immunological quality. In relation to coliform counts, similar values were found in all groups. No significant differences were observed in terms of lamb weight gain according to colostrum quality. In conclusion, the immunological quality of colostrum affected the AC determined, but it did not affect CC or early postnatal lamb weight. These findings offer preliminary insights into the usefulness of the Petrifilm™ system in microbiological quality determination of colostrum and its relationship with immunological quality determined in vitro.
000169913 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000169913 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000169913 700__ $$aHammand, Karen
000169913 700__ $$0(orcid)0000-0002-1659-3387$$aMartínez, Felisa$$uUniversidad de Zaragoza
000169913 7102_ $$11009$$2X$$aUniversidad de Zaragoza$$bDpto. Patología Animal$$cÁrea Técnica. Lab. y Talleres
000169913 773__ $$g7, 1 (2026), 10 [9 pp.]$$tDairy$$x2624-862X
000169913 8564_ $$s838823$$uhttps://zaguan.unizar.es/record/169913/files/texto_completo.pdf$$yVersión publicada
000169913 8564_ $$s2368076$$uhttps://zaguan.unizar.es/record/169913/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000169913 909CO $$ooai:zaguan.unizar.es:169913$$particulos$$pdriver
000169913 951__ $$a2026-03-06-14:50:22
000169913 980__ $$aARTICLE