background: the aim of this study was to determine the seroprevalence of antibody to neospora can­inum in healthy and aborted dairy cattle in tabriz, capital of east-azarbaijan in northwest of iran. methods: in this cross-sectional study serum samples were collected from 266 healthy and ab­orted holestein-feriesisnc cows from september 2008 to august 2009. the sera were analyzed to de­tect of a...

Male calves and culled cows of dairy cattle are used for beef production. However, unlike beef breeds, the genetics of growth performance traits in dairy breeds have not been extensively studied. Here, we performed a genome-wide association study (GWAS) on Holsteins ( = 5,519), Jerseys ( = 1,231), and Red Dairy Cattle ( = 4,410) to identify QTL for growth traits. First, a GWAS was performed wit...

In Denmark, agriculture is the largest source of anthropogenic methane emissions (81%), mainly from cattle (dairy and beef) farms. Whole-farm were quantified at nine Danish farms, using tracer gas dispersion method. Five to six measurement campaigns carried out each farm, covering a full year. Of seven home dairy cows two beef cattle. The farms represented typical breeds, housing management sys...

The study was conducted to develop and evaluate an Indirect Hemagglutination Antibody Test (IHAT) for the serological diagnosis of Cysticercus bovis in live animals. IHAT was set-up inhouse and used to test serum samples of cattle against sheep red blood cell (SRBC) coated with crude extracts of C. bovis cyst. Serum samples for screening were collected from Addis Ababa abattoir (n=522), a dairy...

Dairy cattle reared in western Kenya are exposed to medium to high levels of trypanosomosis risk. The social background, farm characteristics and dairy cattle productivity of 90 and 30 randomly selected farmers from medium- and high-risk trypanosomosis areas, respectively, were compared. All the 120 farmers were visited between July and August 2002. Data analysis was performed using descriptive...

Hastalık belirtilerinin başlaması ile ölüm arasındaki sürenin 24 saat veya daha az olduğu ölümler ani olarak değerlendirilmektedir. Sütçü sığırlarda karşılaşılan olgularının başlıca nedenleri; santral sinir sistemi, kardiyak, solunum metabolik/toksik bozukluklar ve enfeksiyon hastalıkları başlıkları altında incelenmektedir. Sığırlarda atipik seyirli hastalıklara bağlı de gözlenmektedir. Süt işl...

the reproductive performance of a dairy herd has a significant effect on the profitability of that herd. common measures of reproductive performance are days to first service, days to conception, calving interval, services per conception, conception rate, estrus detection rate, and pregnancy rate. most cow operations would benefit economically by reducing the number of operational days, decreas...

embryo transfer (et) in holstein dairy cattle became an important commercial enterprise after the introduction of non-surgical recovery technique. embryo transfer could increase the reproductive rate of genetically superior cows. the objectives of the present study were to evaluate the use of et in iranian holstein dairy cattle to increase selection intensity on the dam side, economically; esti...