Subclinical mastitis in dairy cows in Swiss organic and conventional production systems
| Autor: | Melchior Schällibaum, Marcus G. Doherr, Walter Schären, M. Roesch, Jürg W. Blum |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Veterinary medicine
Dairy industry Cell Count Animal science medicine Prevalence Animals Subclinical mastitis Udder Mastitis Bovine Dairy cattle Post partum business.industry General Medicine medicine.disease Mastitis Dairying medicine.anatomical_structure Milk Animal Science and Zoology Cattle Female Coagulase business Switzerland Food Science California mastitis test |
| Zdroj: | Roesch, Markus; G Doherr, Marcus; Schären, Walter; Schällibaum, Melchior; Blum, Jürg W (2007). Subclinical mastitis in dairy cows in Swiss organic and conventional production systems. Journal of dairy research, 74(1), pp. 86-92. London: Cambridge University Press 10.1017/S002202990600210X |
| Popis: | The objective was to compare the prevalence of subclinical mastitis (SM) and of udder pathogens in 60 Swiss organic (OP) and 60 conventional production systems (CP). Cows (n=970) were studied for SM prevalence and udder pathogens at median 31 d and 102 d post partum. Cows showing a [ges ]1+ positive California Mastitis Test (CMT) in at least one quarter were considered to have SM. Cow-level prevalences of SM for visits at 31 d and 102 d post partum (39% and 40% in OP and 34% and 35% in CP) were similar, but quarter-level prevalences of SM were higher (Ppost partum were higher (Ppost partum in OP and CP cows (45000 and 38000 cells/ml, respectively). In milk samples from quarters showing a CMT reaction [ges ]2+ the prevalences of coagulase negative staphylococci were lower (Ppost partum, whereas prevalences of non-agalactiae streptococci were higher (Ppost partum. In conclusion, under Swiss conditions, subclinical mastitis is a greater problem in organic than in conventional production systems, but differences are not marked. |
| Databáze: | OpenAIRE |
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