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- Gulliksen, S.M.; Jor, E.; Lie, K.I.; Løken, T.; Åkerstedt, J.; Østerås, O.
- Journal of dairy science 2009 v.92 no.10 pp. 5139-5146
- respiratory system agents, etc ; dairy cattle; calves; seroprevalence; risk factors; herd health; Mycoplasma bovis; bacterial infections; nematode infections; viral diseases of animals and humans; Dictyocaulus viviparus; antibody detection; Norway; Show all 13 Subjects
- ... The aims of this study were to estimate the seroprevalence of respiratory agents in Norwegian dairy calves and to identify risk factors for respiratory disease. The participating 135 herds were randomly selected from those in The Norwegian Dairy Herd Recording System with at least 15 cow years. Each herd was followed for 1 yr. Blood samples from calves of >150 d of age (n = 1,348) were analyzed fo ...