{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T02:26:57Z","timestamp":1790389617507,"version":"4.1.0"},"reference-count":44,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2023,2,20]],"date-time":"2023-02-20T00:00:00Z","timestamp":1676851200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Austrian Competence Centre for Feed and Food Quality, Safety and Innovation","award":["854182"],"award-info":[{"award-number":["854182"]}]},{"DOI":"10.13039\/501100004955","name":"Austrian ministries BMVIT","doi-asserted-by":"publisher","award":["854182"],"award-info":[{"award-number":["854182"]}],"id":[{"id":"10.13039\/501100004955","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Zoetis","award":["854182"],"award-info":[{"award-number":["854182"]}]},{"name":"University of Veterinary Medicine Vienna","award":["854182"],"award-info":[{"award-number":["854182"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>Monitoring rumination activity is considered a useful indicator for the early detection of diseases and metabolic disorders. Accelerometer-based sensor systems provide health alerts based on individual thresholds of rumination times in dairy cows. Detailed knowledge of the relationship between sensor-based rumination times and rumen physiology would help detect conspicuous animals and evaluate the treatment\u2019s success. This study aimed to investigate the association between sensor-based health alerts and rumen fluid characteristics in Holstein-Friesian cows at different stages of lactation. Rumen fluid was collected via a stomach tube from 63 pairs of cows with and without health alerts (ALRT vs NALRT). Pairs were matched based on the day of lactation, the number of lactations, and health criteria. Rumen fluid was collected during and after health alerts. The parameters of color, odor, consistency, pH, redox potential, sedimentation flotation time, and the number of protozoa were examined. Results showed differences between both groups in odor, rumen pH, sedimentation flotation time, and protozoan count at the first rumen fluid collection. Within the groups, greater variations in rumen fluid parameters were found for ALRT cows compared to NALRT cows. The interaction between health alert and stage of lactation did not affect the rumen fluid parameters.<\/jats:p>","DOI":"10.3390\/ani13040759","type":"journal-article","created":{"date-parts":[[2023,2,20]],"date-time":"2023-02-20T05:57:52Z","timestamp":1676872672000},"page":"759","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Association between Rumination Times Detected by an Ear Tag-Based Accelerometer System and Rumen Physiology in Dairy Cows"],"prefix":"10.3390","volume":"13","author":[{"given":"Anne","family":"Simoni","sequence":"first","affiliation":[{"name":"University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, University of Veterinary Medicine, 1210 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew","family":"Hancock","sequence":"additional","affiliation":[{"name":"Zoetis International, D18 T3Y1 Dublin, Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0957-9664","authenticated-orcid":false,"given":"Christian","family":"Wunderlich","sequence":"additional","affiliation":[{"name":"Zoetis Germany GmbH, 10785 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcus","family":"Klawitter","sequence":"additional","affiliation":[{"name":"Zoetis Germany GmbH, 10785 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Breuer","sequence":"additional","affiliation":[{"name":"Zoetis Germany GmbH, 10785 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0872-8800","authenticated-orcid":false,"given":"Felix","family":"K\u00f6nig","sequence":"additional","affiliation":[{"name":"University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, University of Veterinary Medicine, 1210 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karina","family":"Weimar","sequence":"additional","affiliation":[{"name":"University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, University of Veterinary Medicine, 1210 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2824-8185","authenticated-orcid":false,"given":"Marc","family":"Drillich","sequence":"additional","affiliation":[{"name":"University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, University of Veterinary Medicine, 1210 Vienna, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7893-6050","authenticated-orcid":false,"given":"Michael","family":"Iwersen","sequence":"additional","affiliation":[{"name":"University Clinic for Ruminants, Clinical Unit for Herd Health Management in Ruminants, University of Veterinary Medicine, 1210 Vienna, Austria"},{"name":"FFoQSI GmbH\u2014Austrian Competence Centre for Feed and Food Quality, Safety and Innovation, Technopark 1D, 3430 Tulln, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"439","DOI":"10.1016\/S0749-0720(15)30794-5","article-title":"Ingestion and mastication of feed by dairy cattle","volume":"7","author":"Beauchemin","year":"1991","journal-title":"Vet. 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