كتاب Efficacy of strategic tilmicosin injection during an outbreak of respiratory disease in housed beef calves

Efficacy of strategic tilmicosin injection during an outbreak of respiratory disease in housed beef calves من كتب طب بيطرى The problems associated with the strategic timing of a single injection of long- acting antibiotic, such as tilmicosin or oxytetracycline, to limit the incidence of respiratory disease in young cattle are highlighted in this study. While 23 cases of respiratory disease were identified during the 3 week period immediately follow- ing housing, no lnore than six calves were treated on a single day. Such a low dis- ease incidence did not justify antibiotic treatment of the whole group of 115 calves. During the previous winter, respiratory disease was first identified in this herd 3 weeks following housing with a peak incidence 10 days after the first recog- nized case (Scott, 1994) compared to 21 days in the present study. The most appropriate timing for strategic antibiotic treatment prior to the peak incidence of bovine respiratory disease following housing requires further investigation. In a group of calves where strategic long-acting antibiotic injection appeared to reduce the further occurrence of respiratory disease (Laven & Andrews, 1991),
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