کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5793214 1554167 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cow-specific risk factors for clinical mastitis in Brazilian dairy cattle
ترجمه فارسی عنوان
عوامل خطر گاو خاص برای ماستیت بالینی در گاو شیری برزیل
کلمات کلیدی
ماستیت بالینی، عامل خطر، صنعت لبنی برزیل، بیماری زا،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی


- The influence of cow features under the risk of having clinical mastitis was analyzed.
- The risk factors influence on the mainly clinical mastitis pathogens were studied.
- Environmental pathogens should be the focus to clinical mastitis control in Brazil.

Information related to mastitis risk factors is useful for the design and implementation of clinical mastitis (CM) control programs. The first objective of our study was to model the risk of CM under Brazilian conditions, using cow-specific risk factors. Our second objective was to explore which risk factors were associated with the occurrence of the most common pathogens involved in Brazilian CM infections. The analyses were based on 65 months of data from 9,789 dairy cows and 12,464 CM cases. Cow-specific risk factors that could easily be measured in standard Brazilian dairy farms were used in the statistical analyses, which included logistic regression and multinomial logistic regression. The first month of lactation, high somatic cell count, rainy season and history of clinical mastitis cases were factors associated with CM for both primiparous and multiparous cows. In addition, parity and breed were also associated risk factors for multiparous cows. Of all CM cases, 54% showed positive bacteriological culturing results from which 57% were classified as environmental pathogens, with a large percentage of coliforms (35%). Coagulase-negative Staphylococcus (16%), Streptococcus uberis (9%), Streptococcus agalactiae (7%) and other Streptococci (9%) were also common pathogens. Among the pathogens analyzed, the association of cow-specific risk factors, such as Zebu breed (OR = 5.84, 95%CI 3.77-10.77) and accumulated history of SCC (1.76, 95%CI 1.37-2.27), was different for CM caused by Coagulase-negative Staphylococcus and S. agalactiae in comparison to CM caused by coliforms. Our results suggest that CM control programs in Brazil should specially consider the recent history of clinical mastitis cases and the beginning of the lactations, mainly during the rainy season as important risk factor for mastitis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Preventive Veterinary Medicine - Volume 121, Issues 3–4, 1 October 2015, Pages 297-305
نویسندگان
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