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首页> 外文期刊>Tropical Animal Health and Production >Economic losses caused by the use of low-efficacy anthelmintic drugs in growing heifers
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Economic losses caused by the use of low-efficacy anthelmintic drugs in growing heifers

机译：利用低疗效造成的经济损失造成的血腥药物在种植的小母牛中

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The aim of this study was to compare the economic revenue related to the use of low- or high-efficacy anthelmintic drugs within suppressive or strategic schemes of treatment in growing heifers. Heifers raised in a semi-intensive grazing system in southern Brazil were used. Levamisole and ivermectin were selected as the high- and the low-efficacy drugs, respectively, based on a previous efficacy test. Subsequently, these drugs were used within strategic (Strat; four times per year) or suppressive (Supp; once a month) treatment regimens in the heifers, and their liveweight and eggs per gram of feces counts were monthly evaluated during a 13-month period. The total costs of the treatments and their cost-benefit ratio in regard to liveweight gain were calculated. Final mean liveweight gains (kg) observed were 126.7 (Strat-Low), 133.6 (Supp-Low), 141.3 (Strat-High), 142.9 (Supp-High), and 125.8 (Control). Treatments with a high-efficacy drug resulted in monetary gains of US$ 19.56 (Strat-High) and US$ 14.98 (Supp-High), but Supp-Low and Strat-Low treatments caused economic losses. Total cost of the efficacy test (US$ 374.79) could be paid by the additional liveweight gain of 20 heifers from the Strat-High group. These results showed that it would be preferable not to treat the heifers against GIN if compared with treating them with a low-efficacy drug. In addition, we showed that the use of four treatments per year with a high-efficacy drug-selected by efficacy test-resulted in a profitable management to control GIN in growing heifers raised in a semi-intensive gazing system in southern Brazil.
机译：本研究的目的是将与在种植的小母牛的抑制或战略治疗方案中使用低疗效的低疗效和高效性的经济收入。在巴西南部的半密集放牧系统中提出的小母牛。基于先前的疗效试验，分别选择左旋吲哚和伊维菌素作为高疗效药物，分别为高效率药物。随后，这些药物在战略（STRAT;每年4次）或抑制（吐痰;每月一​​次）治疗方案，他们在13个月期间每月评估每克粪便数量的活力和鸡蛋。计算治疗的总成本及其在Liveweight Gain方面的成本效益比率。观察到的最终平均值增长（KG）为126.7（Strat-Low），133.6（SCH-LOW），141.3（Strat-High），142.9（SCHOP-HIGH）和125.8（对照）。具有高效率药物的治疗导致货币衰减为19.56美元（Strat-High）和14.98美元（Supp-High），但赞许和低矮的治疗导致经济损失。功效试验的总成本（374.79美元）可以通过Strat-High集团的20个小母牛的额外活力增益支付。这些结果表明，如果用低效率药物治疗它们，则优选不需要对杜松子林治疗他的血管。此外，我们表明，每年使用四种治疗方法，用疗效测试的高效药物选择 - 导致了一个有利可图的管理，以控制在巴西南部的半密集凝视系统中筹集的生长后血液中的杜松子酒。

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