Comparison of diagnostic methods for assessment of Ostertagia ostertagi exposure in Norwegian dairy herds
Tonje Opsal,
Ingrid Toftaker,
Lucy Robertson
et al.
Abstract:Background
The gastrointestinal nematode (GIN) Ostertagia ostertagi can cause severe disease in first season grazers (FSG) and impaired performance due to subclinical infections in adult cows. Diagnostic methods to assess exposure include faecal egg count and detection of specific antibodies using antibody-ELISAs resulting in an optical density ratio (ODR). Using the ELISA test on bulk tank milk (BTM) allows for a herd level diagnosis. Appropriate use of diagnostic methods for evaluation of O. … Show more
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