Metritis and clinical mastitis events in lactating dairy cows were associated with altered patterns of rumination, physical activity, and lying behavior monitored by an ear-attached sensor
نویسندگان
چکیده
Understanding changes in parameters recorded by automated health monitoring systems based on ear-attached sensors the days immediately before and after diagnosis of metritis clinical mastitis can help develop dairy cow strategies. The objective this observational cohort study was to characterize rumination time, physical activity, lying time monitored an sensor before, during, (CD) mastitis. Lactating Holsteins daily for 21 DIM detection disorders were retrospectively included no-clinical disorder group (NCHD; n = 616) if no diagnosed. Cows (MET; 69) or (MAST; 36) diagnosed only with non-severe (watery, reddish, fetid uterine discharge without pyrexia) (visibly abnormal milk secretion signs udder inflammation pyrexia systemic disease), respectively. severe (signs plus disease) cows another within −7 +7 d CD (MET+; 25) (MAST+; 15) group, fitted accelerometer measure time. Mean values, mean value absolute change, relative change from 3 5 nadir mastitis, respectively analyzed linear mixed models repeated measures. Rumination activity lesser, greater MET MET+ groups than NCHD most −4 metritis. Generally, differences larger more prolonged between groups. Similarly, MAST MAST+ had lesser several diagnosis. Lying day −1 0 CD. Absolute values peak different group. Similar results observed compared For metritis, either increase a decrease resolution but NCHD. signs, significant signs. We conclude that affected presented substantial alterations pattern captured sensor. Thus, might be used as aid identifying Moreover, behavioral parameter good indicators not
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2023
ISSN: ['0022-0302', '1525-3198', '1529-9066']
DOI: https://doi.org/10.3168/jds.2022-23157