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Risk factors associated with BMSCC greater than 200,000 cells/ml in dairy herds in southern Chile
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UNSPECIFIED (2003) Risk factors associated with BMSCC greater than 200,000 cells/ml in dairy herds in southern Chile. PREVENTIVE VETERINARY MEDICINE, 58 (1-2). pp. 15-24. doi:10.1016/S0167-5877(03)00002-3 ISSN 0167-5877.
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Official URL: http://dx.doi.org/10.1016/S0167-5877(03)00002-3
Abstract
A cross-sectional survey of 523 dairy farms in the south of Chile was carried out to quantify risk factors associated with bulk-milk somatic-cell count (BMSCC) >200 x 10(3) cells/ml.
Questionnaires followed by one reminder were sent to 3710 dairy farms via the 11 milk-processing plants that they supplied in October 1998. The response proportion was 14.1%. The median BMSCC was 289 x 10(3) cells/ml (range: 74 x 10(3) to 1800 x 10(3) cells/ml). The median herd size was 70 cows (range: 7-616); herd size was not associated with BMSCC. The annual milk yield of 33.2% of the herds was <4000 l and 53.4% had an annual milk yield of 4 x 10(3) to 6 x 10(3) l. Clinical-mastitis records were kept by 55.3% of the farmers. Seventy-six percent of the farmers (377/499) reported <10 clinical cases of mastitis in the year prior to the questionnaire.
Logistic multiple regression indicated that BMSCC >200 x 10(3) cells/ml was more likely when foremilking was practised, and when cows were collected in a yard before milking. BMSCC was less likely to be >200 x 10(3) cells/ml when teats were washed with water containing disinfectant compared with plain water; when the udder and teats were always checked before milking compared with, sometimes or never; when cows with mastitis were milked first compared with any other ordering, and when farmers recorded individual-cow somatic-cell count (ICSCC) compared with when ICSCC was not recorded. (C) 2003 Elsevier Science B.V. All rights reserved.
Item Type: | Journal Article | ||||
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Subjects: | S Agriculture > SF Animal culture | ||||
Journal or Publication Title: | PREVENTIVE VETERINARY MEDICINE | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0167-5877 | ||||
Official Date: | 30 April 2003 | ||||
Dates: |
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Volume: | 58 | ||||
Number: | 1-2 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 15-24 | ||||
DOI: | 10.1016/S0167-5877(03)00002-3 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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