The serum responses to M. hyopneumoniae infection
measured by commercial ELISAs are shown in Table 4 and
in supplemental Tables S2 and S3. Table 4 shows the
summarized commercial ELISA results from the M.
hyopneumoniae challenged pigs. Without exception, all
of the commercial assays were capable of identifying
infected animals over time. Few of the sera were strongly
positive; most of the responses were borderline positive.
The OXOID and HIPRA ELISAs both showed borderline
results by day 15 following challenge. The IDEXX ELISA did
not show positive results until day 36. Only one animal
was borderline positive (animal 199) throughout the 118-
day study by the Synbiotics ELISA.