{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/50414"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/50414","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Changes in Activity and Milk Components Around the Onset of Peripartum Diseases in Dairy Cows","abstract":"Activity and milk components were examined around disease onset in the periparturient period. Cows were monitored for daily rest bouts, rest duration, rest time, and step activity from -21 to +30 d relative to calving. Lactose concentration, fat to protein ratio (F:P), and milk yield were monitored. Diseases analyzed were assisted calving, mastitis, subclinical ketosis (SK), and a multiple disease category (MULTI) for animals who experienced more than one disease. Rest bouts decreased (d 0), step activity increased (d 0), and rest duration decreased (d -1) in animals that experienced assisted calving compared to controls. Mastitic cows showed fewer rest bouts (d -4, -3, -2, -1, and 0), increased activity (d -4, -2, and -1), decreased rest time (d -6, -5, -4, and -2), and decreased milk yield (d -4, -2, -1, 0) compared to controls. Cows with SK showed increased activity (d -5, -4, -3, and -2), decreased rest duration (d -7, -6, -5, -4, and -3), rest time (d -7, -6, -5, -4, -3, and -2), milk yield (d -4, -3, -2, -1, and 0) and lactose concentration (d -3, -2, -1, and 0) compared to controls. Animals categorized as MULTI showed increased activity (d -6, -5, -4, -3, and -2), increased F:P (d -2, -1 and 0), decreased rest time (d -5, -4, -3, and -2), and decreased lactose concentration (d -6, -5, -4, -5, -3, -2, -1, and 0) compared to controls. Deviations in activity and milk components could be used to proactively manage herd health.","abstract_html":"Activity and milk components were examined around disease onset in the periparturient period. Cows were monitored for daily rest bouts, rest duration, rest time, and step activity from -21 to +30 d relative to calving. Lactose concentration, fat to protein ratio (F:P), and milk yield were monitored. Diseases analyzed were assisted calving, mastitis, subclinical ketosis (SK), and a multiple disease category (MULTI) for animals who experienced more than one disease. Rest bouts decreased (d 0), step activity increased (d 0), and rest duration decreased (d -1) in animals that experienced assisted calving compared to controls. Mastitic cows showed fewer rest bouts (d -4, -3, -2, -1, and 0), increased activity (d -4, -2, and -1), decreased rest time (d -6, -5, -4, and -2), and decreased milk yield (d -4, -2, -1, 0) compared to controls. Cows with SK showed increased activity (d -5, -4, -3, and -2), decreased rest duration (d -7, -6, -5, -4, and -3), rest time (d -7, -6, -5, -4, -3, and -2), milk yield (d -4, -3, -2, -1, and 0) and lactose concentration (d -3, -2, -1, and 0) compared to controls. Animals categorized as MULTI showed increased activity (d -6, -5, -4, -3, and -2), increased F:P (d -2, -1 and 0), decreased rest time (d -5, -4, -3, and -2), and decreased lactose concentration (d -6, -5, -4, -5, -3, -2, -1, and 0) compared to controls. Deviations in activity and milk components could be used to proactively manage herd health.","abstract_has_math":false,"creators":["Griffith, Abigail Susanne"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Dairy Science","degree_department":"Dairy Science","school":null,"contributors":[],"advisors":[],"committee_chairs":["Petersson-Wolfe, Christina S."],"committee_members":["Schramm, Hollie H.","Bewley, Jeffrey Michael"],"year":2014,"date_issued":"2014-08-23","date_published":"2014-08-23","updated_at":"2026-07-22T22:19:19Z","subjects":["behavior","deviations","disease"],"languages":[],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["vt_gsexam:3499"],"render_values":[{"text":"vt_gsexam:3499","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/50414","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.committeechair","label":"Committee Chair","values":["Petersson-Wolfe, Christina S."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Schramm, Hollie H.","Bewley, Jeffrey Michael"]},{"key":"dc:contributor.department","label":"Department","values":["Dairy Science"]},{"key":"dc:creator","label":"Author","values":["Griffith, Abigail Susanne"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-08-24T08:00:20Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-08-24T08:00:20Z"]},{"key":"dc:date.issued","label":"Date","values":["2014-08-23"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Dairy Science"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["behavior","deviations","disease"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["vt_gsexam:3499"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/50414"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Activity and milk components were examined around disease onset in the periparturient period. Cows were monitored for daily rest bouts, rest duration, rest time, and step activity from -21 to +30 d relative to calving. Lactose concentration, fat to protein ratio (F:P), and milk yield were monitored. Diseases analyzed were assisted calving, mastitis, subclinical ketosis (SK), and a multiple disease category (MULTI) for animals who experienced more than one disease. Rest bouts decreased (d 0), step activity increased (d 0), and rest duration decreased (d -1) in animals that experienced assisted calving compared to controls. Mastitic cows showed fewer rest bouts (d -4, -3, -2, -1, and 0), increased activity (d -4, -2, and -1), decreased rest time (d -6, -5, -4, and -2), and decreased milk yield (d -4, -2, -1, 0) compared to controls. Cows with SK showed increased activity (d -5, -4, -3, and -2), decreased rest duration (d -7, -6, -5, -4, and -3), rest time (d -7, -6, -5, -4, -3, and -2), milk yield (d -4, -3, -2, -1, and 0) and lactose concentration (d -3, -2, -1, and 0) compared to controls. Animals categorized as MULTI showed increased activity (d -6, -5, -4, -3, and -2), increased F:P (d -2, -1 and 0), decreased rest time (d -5, -4, -3, and -2), and decreased lactose concentration (d -6, -5, -4, -5, -3, -2, -1, and 0) compared to controls. Deviations in activity and milk components could be used to proactively manage herd health."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["ETD"]},{"key":"dc:title","label":"Title","values":["Changes in Activity and Milk Components Around the Onset of Peripartum Diseases in Dairy Cows"]}]}],"canonical_facts":{"dc:contributor.committeechair":["Petersson-Wolfe, Christina S."],"dc:contributor.committeemember":["Schramm, Hollie H.","Bewley, Jeffrey Michael"],"dc:contributor.department":["Dairy Science"],"dc:creator":["Griffith, Abigail Susanne"],"dc:date.accessioned":["2014-08-24T08:00:20Z"],"dc:date.available":["2014-08-24T08:00:20Z"],"dc:date.issued":["2014-08-23"],"dc:description.abstract":["Activity and milk components were examined around disease onset in the periparturient period. Cows were monitored for daily rest bouts, rest duration, rest time, and step activity from -21 to +30 d relative to calving. Lactose concentration, fat to protein ratio (F:P), and milk yield were monitored. Diseases analyzed were assisted calving, mastitis, subclinical ketosis (SK), and a multiple disease category (MULTI) for animals who experienced more than one disease. Rest bouts decreased (d 0), step activity increased (d 0), and rest duration decreased (d -1) in animals that experienced assisted calving compared to controls. Mastitic cows showed fewer rest bouts (d -4, -3, -2, -1, and 0), increased activity (d -4, -2, and -1), decreased rest time (d -6, -5, -4, and -2), and decreased milk yield (d -4, -2, -1, 0) compared to controls. Cows with SK showed increased activity (d -5, -4, -3, and -2), decreased rest duration (d -7, -6, -5, -4, and -3), rest time (d -7, -6, -5, -4, -3, and -2), milk yield (d -4, -3, -2, -1, and 0) and lactose concentration (d -3, -2, -1, and 0) compared to controls. Animals categorized as MULTI showed increased activity (d -6, -5, -4, -3, and -2), increased F:P (d -2, -1 and 0), decreased rest time (d -5, -4, -3, and -2), and decreased lactose concentration (d -6, -5, -4, -5, -3, -2, -1, and 0) compared to controls. Deviations in activity and milk components could be used to proactively manage herd health."],"dc:description.degree":["Master of Science"],"dc:format.medium":["ETD"],"dc:identifier.other":["vt_gsexam:3499"],"dc:identifier.uri":["http://hdl.handle.net/10919/50414"],"dc:publisher":["Virginia Tech"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:subject":["behavior","deviations","disease"],"dc:title":["Changes in Activity and Milk Components Around the Onset of Peripartum Diseases in Dairy Cows"],"dc:type":["Thesis"],"thesis:degree_discipline":["Dairy Science"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:19:19Z"}