52 research outputs found
Repetition of estrus is the most frequent reproductive problem after breeding in dairy cattle from Rio de Janeiro, Brazil
Association of the occurrence of some diseases with reproductive performance and milk production of dairy herds in southern Brazil
Escherichia coli J5: imunização de fĂȘmeas bovinas leiteiras contra mastites causadas por Escherichia coli
Editorial: Within- and between-host mathematical modeling of Mycobacterium avium aubspecies paratuberculosis (MAP) infections as a tool to study the dynamics of host-pathogen interactions in bovine paratuberculosis : Editorial
International audienceNo abstract availabl
Clinical Ketosis: Phenotypic and genetic correlations between occurrences and with milk yield
Effects of clinical ketosis on test day milk yields in Finnish Ayrshire cattle
A linear model for repeated measurements was used to estimate the effects of clinical ketosis on 722,198 test day milk yields collected from September 1, 1985 to January 31, 1988 on 60,851 Finnish Ayrshire cows of parity 17 d after diagnosis, and milk collected on nonketotic cows. For each parity separately, the statistical model included fixed effects (ketosis, calving season, year and season of milk sampling, and stage of lactation) and random effects (herd and permanent and temporary environments) on test day milk yields. The pattern underlying correlations between temporary environmental effects was accommodated in the statistical model. Compared with those for nonketotic cows, lactation curves of cows with ketosis showed a depression in early lactation; estimated milk loss was 44.3 kg for 17 d after diagnosis. The 305-d milk yield of cows diagnosed with ketosis was estimated to be 141.1 kg higher than that of cows free of ketosis. Although milk losses occurred after ketosis, ketotic cows yielded more milk over the entire lactation than did nonketotic cows; and yields would have been even higher if cows had not had ketosis
Sole ulcers in dairy cattle associations with season, cow characteristics, disease, and production.
Simulation Study on Covariance Component Estimation for Two Binary Traits in an Underlying Continuous Scale
Heel erosion and other interdigital disorders in dairy cows:associations with season, cow characteristics, disease, and production.
Skin injuries on the body and thigh of dairy cows:associations with season, claw health, disease treatment, and other cow characteristics.
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