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5.1.1 Blood serology for Lawsonia intracellularis

Immunofluorescence (IFA) or immunoperoxidase assays (IPMA) are now available for routine testing of swine serum antibodies against Lawsonia intracellularis in several countries around the world. A competitive blocking ELISA using two different monoclonal antibodies against antibody epitopes of Lawsonia intracellularis has recently been developed and is now commercially available.

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