m. hyopneumoniae reference antisera , and sera from swine naturally infected with m. hyopneumoniae and m. flocculare were also evaluated by an antibody inhibition procedure , i.e. , sera were mixed with m. hyopneumoniae or m. flocculare antigen , incubated overnight and tested against m. hyopneumoniae antigen in the elisa .
C0020960
antisera
C0003241
antibody