February 27, 2018

Researchers in Argentina replaced ivermectin-resistant worms (Cooperia spp.) with susceptible worms. After two production cycles, the clinical efficacy of ivermectin improved from 73% to 99.4%, while the absolute efficacy improved from 54.1% to 87.5%.

No clinical signs...

A 3-year study (2006-2008) was conducted at the Appalachian Farming Systems Research Center in Beaver, West Virginia to determine the effects of selective deworming on performance and parameters associated with gastro-intestinal parasite management.
 

Suffolk and Katahd...

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