Risk factors associated with BMSCC greater than 200,000 cells/ml in dairy herds in southern Chile
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. ISSN 0167-5877Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/S0167-5877(03)00002-3
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|
|Subjects:||S Agriculture > SF Animal culture|
|Journal or Publication Title:||PREVENTIVE VETERINARY MEDICINE|
|Publisher:||ELSEVIER SCIENCE BV|
|Date:||30 April 2003|
|Number of Pages:||10|
|Page Range:||pp. 15-24|
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