Reduced field efficacy of ivermectin against Ostertagia ostertagi and Cooperia oncophora in Danish cattle

Landbrug og biologi

• Cooperia oncophora 100%
• Ostertagia ostertagi 92%
• ivermectin 78%
• farms 43%
• cattle 39%
• fecal egg count 35%
• confidence interval 19%
• animals 14%
• gastrointestinal nematodes 14%
• anthelmintics 12%
• lactones 12%
• heifers 11%
• Nematoda 9%
• girth 6%
• internal transcribed spacers 5%
• grazing 4%
• feces 4%
• quantitative polymerase chain reaction 4%
• testing 4%
• monitoring 3%
• body weight 3%
• eggs 3%
• methodology 3%
• assays 3%
• infection 3%
• DNA 3%