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[Grass tetany in cattle].
Summary
Optimal magnesium supplementation for dairy cows during pasture is crucial. Metaphylactic treatments effectively reduced losses from grass tetany and stabilized serum magnesium levels in affected herds.
Area of Science:
- Veterinary Medicine
- Animal Nutrition
- Ruminant Health
Context:
- Grass tetany is a significant concern for dairy farms during the pasture season.
- Low serum magnesium levels (below 1.8 mg/100 ml) indicate a risk of grass tetany.
- Effective metaphylactic strategies are needed to prevent economic losses.
Purpose:
- To evaluate the efficacy of different magnesium preparations for metaphylactic treatment of grass tetany in dairy cows.
- To assess the impact of these treatments on serum magnesium concentrations.
- To provide recommendations for managing magnesium deficiency in at-risk herds.
Summary:
- A study in Potsdam (1970-1975) investigated metaphylactic treatments for grass tetany in 224 dairy cows with low serum magnesium.
- A 25% magnesium sulfate (MgSO4) solution and other preparations (Parevert, Vers. A) were administered.
- These treatments successfully reduced losses from grass tetany and prevented further drops in serum magnesium, even at low dosages.
Impact:
- Metaphylactic administration of magnesium preparations can significantly mitigate losses associated with grass tetany.
- Maintaining adequate serum magnesium levels through supplementation is vital for preventing hypomagnesemia in grazing dairy cows.
- The findings support the recommendation of metaphylactic measures for herds at risk of magnesium deficiency.