Timely Topics

Symposium review: The importance of the ruminal epithelial barrier for a healthy and productive cow

By Jörg R. Aschenbach, Qendrim Zebeli, Amlan K. Patra, Gabriele Greco, Salah Amasheh, Gregory B. Penner

The ruminal epithelium is the main site for absorption of key nutrients and electrolytes. Yet, the absorptive function has to be highly selective to prevent entry of microbes and toxins. This study outlines what researchers know, and still must uncover, about the factors that counteract barrier impairment and help with barrier restoration.  Read

Claw disorders in dairy cattle: Effects on production, welfare and farm economics with possible prevention methods

By Marie Alvergnas, Tomasz Strabel, Katarzyna Rzewuska, Ewa Sell-Kubiak

Laminitis-related and infectious claw disorders often cause a decrease in milk yield. Claw disorders are also responsible for reproduction problems and can reduce feed intake. This study examines the most efficient measures to prevent those losses — and improve animal welfare. Read

Intramammary infusion of Escherichia coli lipopolysaccharide negatively affects feed intake, chewing, and clinical variables, but some effects are stronger in cows experiencing subacute rumen acidosis

By S. Aditya, E. Humer, P. Pourazad, R. Khiaosa-Ard, J. Huber, Q. Zebeli

Cows with Sub Acute Ruminal Acidosis (SARA) are more susceptible to other health challenges than healthy cows. This study showed differences in fever symptoms, DMI and even chewing activity were more pronounced in SARA cows compared to healthy animals. Read

Changes in digestive microbiota due to a grain-based SARA challenge

By Jan C. Plaizier, Shucong Li, Anne Mette Danscher, Hooman Derakshani, Pia H. Andersen, Ehsan Khafipour

A study showing how a grain-based diet-induced subacute ruminal acidosis (SARA) challenge impacts the rumen microbiota of lactating dairy cows. The richness, the diversity, as well as the stability of the bacterial communities were reduced for SARA challenged cows. Both ruminal and fecal microbiota were changed, indicating that the rumen but also the hindgut microbiota are affected by SARA challenge. Read
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