Efficacy of a chlortetracycline feed additive in reducing pneumonia and clinical signs induced by experimental <i>Mycoplasma hyopneumoniae challenge</i>
نویسنده
چکیده
Methods: Three groups of pigs (12 pigs per group) were challenged with M hyopneumoniae (Day 0). Two groups received feed containing CTC at 550 g per tonne (500 g per ton; 22 mg per kg of bodyweight) for 14 days, starting either on Day -3 (prior to challenge) or at onset of clinical signs (Day 10). Pigs were evaluated daily for clinical disease (coughing), and all were necropsied on Day 29. Percentage of lung affected by pneumonia, number of organisms isolated from lung tissue, and serum antibodies (ELISA) were measured.
منابع مشابه
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تاریخ انتشار 2006