Traditionally cost-benefit analysis of different farm systems and management strategies, or losses due to diseases, are based on rough estimates made by experts. The purpose of this study is to use panel data to quantify the differences experienced in real life between farmand management systems (fixed sow versus loose sows, one site versus two or multi sites, etc.) and the actual loss due to d...

this study was carried out to control johne’s disease (jd) without interfering with tuberculosis (tb)control programme. a dairy herd (n>1500 heads) was used over a period of 6 years, from 1994 to 1999 forthis investigation. the herd had a history of heavy infection with mycobacterium avium paratuberculosis(map) with culling rates of 1.5 and 5%, in 1991 and 1995, respectively. the mean annual lo...

868 www.thelancet.com/infection Vol 15 August 2015 6 DuPont HL. Approach to the patient with infectious colitis. Curr Opin Gastroenterol 2012; 28: 39–46. 7 Gu B, Cao Y, Pan S, et al. Comparison of the prevalence and changing resistance to nalidixic acid and ciprofl oxacin of Shigella between Europe-America and Asia-Africa from 1998 to 2009. Int J Antimicrob Agents 2012; 40: 9–17. 8 Baker KS, Da...

Secondary infections as a result of tail biting cause substantial economic losses in pig production and are a subject of concern for animal welfare. The use of first-choice antibacterial agents in the treatment of tail biting in finishing pigs is hypothesized to be negatively correlated with the development of systemic infection. This would be expected to reduce the prevalence of post-mortem py...

APOSTOLOV, A. and I. SABEVA, 2009. Breeding value estimation on some selection traits of performance productivity of small pig populations from the Danube White breed. Bulg. J. Agric. Sci., 15: 276-280 Breeding value estimation was calculated on the basis of mixed-model, Animal model (sire model). The influence of the herd (replacement animals and culled animals), sex and year was studied. The ...

Variance and covariance components for milk yield, survival to second freshening, calving interval in first lactation were estimated by REML with the expectation and maximization algorithm for an animal model which included herd-year-season effects. Cows without calving interval but with milk yield were included. Each of the four data sets of 15 herds included about 3000 Holstein cows. Relation...

The objective of the present study was to estimate genetic parameters for test-day milk, fat and protein yields and 305-day-yields in Murrah buffaloes. 4,757 complete lactations of Murrah buffaloes were analyzed. Co-variance components were estimated by the restricted maximum likelihood method. The models included additive direct genetic and permanent environmental effects as random effects, an...

Bovine tuberculosis (bTB) infection is generally correlated with individual cattle's age, sex, body condition, and with husbandry practices such as herd composition, cattle movement, herd size, production system and proximity to wildlife-including bTB maintenance hosts. We tested the correlation between those factors and the prevalence of bTB, which is endemic in Ethiopia's highland cattle, in ...