Chronic Laminitis In Rumen Acidosis

Rumen lactic acidosis and the appearance of laminitis in zebu cattle rejane dos santos sousa 1 francisco leonardo costa de oliveira 1 mailson rennan borges dias 1 natalia sato minami 1 leonardo do amaral 1 1 2 3.

Chronic laminitis in rumen acidosis.

Journal of dairy science 80 5. Acidosis acidosis is a common metabolic condition in cattle. Ruminal acidosis occurs when acid is produced at a rapid rate usually faster than it can be absorbed or used by. Inflammation of the ruminal epithelium rumenitis could cause pain and also contribute to intake depression during subacute ruminal acidosis.

Intake depression may be mediated by ph receptors and or osmolality receptors in the rumen. Ruminal acidosis is often caused by sudden changes of diet such as the introduction of concentrates in late pregnancy altering the composition of micro organisms in the rumen. Ruminal acidosis is the increase in organic acids and lower ruminal ph owing to rapid fermentation of soluble carbohydrates. The link between acidosis and laminitis appears to be associated with altered hemodynamics of the peripheral microvasculature 15.

Laminitis is aseptic inflammation ischemia and degeneration of laminae of the hooves. Laminitis occurs in acute subclinical and chronic forms 13 53 72 100. When highly fermentable carbohydrates eg grains are fed to stock the production of total rumen organic acids increases and ph decreases increasing the risk of digestive disorders eg acidosis. It typically occurs when the rumen ph is out of balance.

The severity of laminitis depends on the duration. The link between nutrition acidosis and laminitis is the association with nutritional effects on causing metabolic acidosis decreased rumen ph and altered hemodynamics of the peripheral microvasculature resulting in hoof deterioration. It is probable that subacute ruminal acidosis is one key factor in development of laminitis because managing subacute ruminal acidosis sara helps control the incidence of subclinical laminitis. A clinical approach to the diagnosis of subacute rumen acidosis.

Laminitis may be caused both directly and indirectly by acidosis. Absorption of vfa inherently increases as ruminal ph drops. These acids are absorbed only in the protonated state. In north america ruminal acidosis is frequently seen in feedlot lambs and lactating or pregnant ewes that have experienced rapid changes in their ration wolf 2007 but it is unlikely to be seen in extensive grass fed systems.