Dietary cation-anion difference (DCAD) has been a topic of considerable research in dairy cows nutrition for the last 2 decades (NRC, 2001). Much of the early work addressed effects of DCAD on periparturient Ca metabolism and metabolic health of transition dairy cows (NRC, 2001; Block, 1994). Over roughly the same period time, some but less research focused on the effects of DCAD on lactational...

Hypocalcemia is presented in two forms, the less common clinical disease called milk fever and the more common form called subclinical hypocalcemia (SCH). Depending upon how it is defined and the frequency of blood sampling for diagnosis, SCH can affect 25 to 40% of primiparous and 45 to 80% of the multiparous cows. Cows with SCH have reduced dry matter (DM) intake, suppressed measures of innat...

Subklinik metabolik hastal?klar, klinik bulgu göstermeksizin, üreticilerde yüksek miktarda mali kay?plara veya optimalin alt?nda üretime neden olan, süreçlerin bir daha fazlas?na yönelik bozukluklard?r. Daha çok periparturent (geçi?) dönemde s?kl?kla görülen subklinik hastal?klar?n en yayg?n olanlar?; subakut rumen asidozu, ketozis ve hipokalsemidir. Prevalans? insidans? dünya genelinde oldukça...

Johne's disease (JD), caused by Mycobacterium avium subsp. paratuberculosis (MAP), is estimated to infect more than 22% of US dairy herds. Periods of immunosuppression may contribute to the transition from the subclinical to the clinical stage of infection. Understanding the effects of stressors such as parturition on the escalation of disease may provide information that will help to manage JD...

Periparturient diseases continue to be the greatest challenge both farmers and dairy cows. They are associated with a decrease in productivity, lower profitability, negative impact on cows’ health as well public health. This review article discusses pathophysiology diagnostic opportunities of mastitis, most common disease To better understand disease, we dive deep into causative agents, traditi...

US Department of Agriculture, Agricultural Research Service, National Animal Disease Center, Bacterial Diseases of Livestock Research Unit, P.O. Box 70, Ames, IA 50010, USA US Department of Agriculture, Agricultural Research Service, National Animal Disease Center, Periparturient Diseases of Cattle Research Unit, P.O. Box 70, Ames, IA 50010, USA Department of Molecular Microbiology and Immunolo...