Comparative efficacy of two ivermectin pour-on anthelmintics in beef steers in a commercial feedyard
dc.contributor.author | Tarpoff, Anthony John | |
dc.date.accessioned | 2012-04-25T18:42:13Z | |
dc.date.available | 2012-04-25T18:42:13Z | |
dc.date.graduationmonth | May | en_US |
dc.date.issued | 2012-04-25 | |
dc.date.published | 2012 | en_US |
dc.description.abstract | A total of 400 head of naturally parasitized commercial feedyard cattle (subset of 40 hd/pen; 10 pens) were utilized to compare trade name ivermectin pour-on and a generic ivermectin pour-on. The efficacy of each product was measured by obtaining rectal fecal egg counts on day 0 and day 14 using a Modified Wisconsin sugar float with centrifugation from rectal fecal samples and calculating fecal egg reduction post treatment. There were no differences in net egg count reduction between treatments (P= 0.15) at 14 days post-treatment application. Regardless of treatment, only 26% of animals had a fecal egg count reduction of >90% and only 35% achieved a FECR of >80% which is low considering 90% reduction is the accepted efficacy level. Cattle treated with the generic pour-on had improved average daily gains (ADG) compared to cattle treated with the trade name pour-on P = 0.02. This study demonstrated decreased efficacy of both products with a FECR of less than 90% within a commercial feedyard environment. | en_US |
dc.description.advisor | Daniel U. Thomson | en_US |
dc.description.degree | Master of Science | en_US |
dc.description.department | Department of Clinical Sciences | en_US |
dc.description.level | Masters | en_US |
dc.identifier.uri | http://hdl.handle.net/2097/13645 | |
dc.language.iso | en_US | en_US |
dc.publisher | Kansas State University | en |
dc.subject | Generic | en_US |
dc.subject | anthelmintics | en_US |
dc.subject.umi | Veterinary Medicine (0778) | en_US |
dc.title | Comparative efficacy of two ivermectin pour-on anthelmintics in beef steers in a commercial feedyard | en_US |
dc.type | Thesis | en_US |