In conclusion, we have produced the first complete set
of sera from mycoplasma-free swine infected with the four
different swine mycoplasma species. When analyzing
these sera on a pig by pig basis with five different
commercial ELISA assays, we observed low antibody
responses with M. hyopneumoniae challenged animals.
The least sensitive assay was that from Synbiotics where
only one animal seroconverted according to the assay
instructions potentially resulting in a large percentage of
false negative calls.