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Antibody responses against duck Tembusu virus (DTMUV) induced by C-KCE-E immunization in ducks. Groups of five ducks were inoculated subcutaneously with 105 PFU of C-KCE-E, C-KCE or PBS as a negative control. Sera were collected in a range from two to four weeks to detect the NT antibody against DMTUV in nine-day-old specific-pathogen-free (SPF) chicken embryonated eggs. NT antibody titers for ducks are expressed as a log2. Dotted lines indicate the thresholds for a positive response.
