| http://www.w3.org/ns/prov#value | - Antibodies are strongly induced by infection, and become detectable from the diarrhoeic stage onwards by ELISA. From the necropsy examination of two to three animals, lymph nodes, especially the mesenteric and bronchial nodes, lungs, spleen and intestinal mucosae should also be collected aseptically, chilled on ice and transported under refrigeration.
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