Comparative efficacy of two ivermectin pour-on anthelmintics in beef steers in a commercial feedyard

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dc.contributor.author Tarpoff, Anthony John
dc.date.accessioned 2012-04-25T18:42:13Z
dc.date.available 2012-04-25T18:42:13Z
dc.date.issued 2012-04-25
dc.identifier.uri http://hdl.handle.net/2097/13645
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.language.iso en_US en_US
dc.publisher Kansas State University en
dc.subject Generic en_US
dc.subject anthelmintics 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
dc.description.degree Master of Science en_US
dc.description.level Masters en_US
dc.description.department Department of Clinical Sciences en_US
dc.description.advisor Daniel Thomson en_US
dc.subject.umi Veterinary Medicine (0778) en_US
dc.date.published 2012 en_US
dc.date.graduationmonth May en_US


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