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The serum samples were collected as part of usual screening scheme of the farm. The samples were collected by the farm personnel under the supervision of the veterinarians following national ethical guidelines. The present study does not come under the category of experimental research on animals; therefore, formal ethical approval is not required. The herd owner had requested to undertake this study in his farm and has given prior consent.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical considerations"}},{"value":"The farm owner has given consent for research publication with the clause for maintaining the confidentiality of the farm. The permission from competent authority of NDDB has been taken for this publication.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}}]}}