Effects of Lasalocid or Monensin on Legume or Grain (FeedLot) Bloat4

Abstract

Doses of .66 to .99 mg monensin/kg body weight reduced legume bloat in cattle about 66% when compared with pretreatment bloat scores. Similar doses of lasalocid reduced legume bloat about 26%. A dose of 44 mg poloxalene/kg body weight (recommended dose for field use) reduced legume bloat 100%. Monensin or lasalocid combined with 25 or 50% of the recommended dose of poloxalene reduced bloat under that of the antibiotics alone, but did not achieve 100% reduction. The antibiotic thiopeptin provided no preventive effect on legume bloat. Lasalocid, monensin or an experimental polyether antibiotic (X-14,547 A) at a dose of 1.32 mg/kg body weight when tested on cattle bloated on high grain diets reduced bloat by 92, 64 and 25%, respectively. Lasalocid at .66 mg/kg effectively prevented bloat from developing when given to animals before the feeding of high grain diets; however, a 1.32-mg dose was required to control bloat in cattle that were already bloating before they were given lasalocid. A dose of 1.32 mg salinomycin was ineffective in controlling grain bloat.

Rapid screening of feed supplements for the prevention of legume bloat

“…However, producers continue to use and recommend cheaper supplements on the basis of personal experience. Except for poloxalene and some other synthetic surfactants (Bartley et al 1983), few of these supplements have been studied under controlled experimental conditions. Their efficacy needs to be evaluated in controlled trials.…”

Utility of Ionophores for Ruminant Animals: A Review

“…Bloat: Bloat result from excess production of stable foam in the rumen (Bartley et al, 1983). Gas becomes entrapped within the reticulo-rumen and failure of the eructation mechanism causes acute abdominal distension.…”

Brassicaceae Burnett

“…Monensin and lasalocid are partially protective against both frothy pasture bloat and bloat due to a high -grain diet (Bartley et al 1983). The primary aim is to relieve the distension.…”