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
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subclinical-mastitis-in-dairy-cows-in-swiss-organic-and-conventional-production-systems.pdf - Published Version Available under License Publisher holds Copyright. Download (91kB) | Preview |
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 >/=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 (P<0.02) in OP than CP (15% and 18% in OP and 12% and 15% in CP). Median somatic cell counts in milk at 31 d post partum were higher (P<0.05) in OP than CP cows (43000 and 28000 cells/ml, respectively), but were similar at 102 d post partum in OP and CP cows (45000 and 38000 cells/ml, respectively). In milk samples from quarters showing a CMT reaction >/=2+ the prevalences of coagulase negative staphylococci were lower (P<0.05) at 102 d post partum, whereas prevalences of non-agalactiae streptococci were higher (P<0.05) in OP than in CP cows at 31 d and 102 d post partum. In conclusion, under Swiss conditions, subclinical mastitis is a greater problem in organic than in conventional production systems, but differences are not marked.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > DVK - Clinical Research [discontinued] 05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Experimental Clinical Research 05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Physiology |
UniBE Contributor: |
Doherr, Marcus, Blum, Jürg |
ISSN: |
0022-0299 |
Publisher: |
Cambridge University Press |
Submitter: |
Factscience Import |
Date Deposited: |
04 Oct 2013 14:47 |
Last Modified: |
05 Dec 2022 14:14 |
Publisher DOI: |
10.1017/S002202990600210X |
PubMed ID: |
16978453 |
Web of Science ID: |
000245024800013 |
BORIS DOI: |
10.48350/19350 |
URI: |
https://boris.unibe.ch/id/eprint/19350 (FactScience: 1898) |
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