Tuyển tập các báo cáo nghiên cứu về bệnh học thý y được đăng trên tạp chí Acta Veterinaria Scandinavica cung cấp cho các bạn kiến thức về bệnh thú y đề tài: Occurrence of clinical mastitis in primiparous Estonian dairy cows in different housing conditions. | Acta Veterinaria Scandinavica BioMed Central Open Access Occurrence of clinical mastitis in primiparous Estonian dairy cows in different housing conditions Piret Kalmus f1 Arvo Viltropt2 Birgit Aasmaet3 and Kalle Kask 1 Address Department of Therapy Institute of Veterinary Medicine and Animal Science Estonian University of Life Sciences 51014 Tartu Estonia 2Department of Infectious Diseases Institute of Veterinary Medicine and Animal Science Estonian University of Life Sciences 51014 Tartu Estonia and 3Department of Animal Environment and Health Tartu Estonia Email Piret Kalmus - Arvo Viltrop - Birgit Aasmae - Kalle Kask - Corresponding author tEqual contributors Published 21 November 2006 Received 14 August 2006 Accepted 21 November 2006 Acta Veterinaria Scandinavian 2006 48 21 doi l75l-0l47-48-21 This article is available from http content 48 l 2l 2006 Kalmus et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Objectives of the study were to document the impact of some management factors on the occurrence of clinical mastitis in primiparous dairy cows and to identify common udder pathogens of clinical mastitis in freshly calved heifers and multiparous cows on the day of calving. Methods A one-year study was conducted during 2004 and 2005 in ll selected Estonian dairy herds. Data consisted of 68 heifers with clinical mastitis and 995 heifers without clinical mastitis on the day of calving. Multivariable logistic regression with a random herd effect was used to investigate any association between housing system
