Western blot immunoassay as a confirmatory test for the presence of anti-Mycoplasma hyopneumoniae antibodies in swine serum.
A Western blot immunoassay (WBI) was developed as a confirmatory test for 2 commercial Mycoplasma hyopneumoniae (Mhyo) ELISAs. The WBI detected at least 5 antigen bands (150, 130, 74, 70, and 30 kDa) from Mhyo whole membrane proteins that were not present in the antigens prepared from M. hyorhinis and M. hyosynoviae. Among discrepant sera from vaccinated pigs (n = 17) and field samples (n = 91) assayed by WBI: 1) 2 of the ELISA-positive samples reacted with all 5 antigens bands; 2) all blocking ELISA-positive samples (n = 53) bound 150-, 130-, 74-, and 70-kD antigen bands; and 3) all indirect ELISA-positive samples (n = 55) bound 150-, 130-, and 30-kD antigens. We conclude that the WBI targeting the top 4 antigen bands is a useful confirmatory test for samples initially screened using the commercial Mhyo ELISAs.
Ameri
Mehrdad
M
Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames 50011, USA.
Zhou
En-Min
EM
Hsu
Walter H
WH
D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood*; D015153:Blotting, Western / Q000379:methods / Q000662:veterinary*; D045705:Mycoplasma hyopneumoniae / Q000276:immunology / Q000302:isolation & purification*; D045729:Pneumonia of Swine, Mycoplasmal / Q000175:diagnosis / Q000382:microbiology*; D012141:Respiratory Tract Infections / Q000175:diagnosis / Q000382:microbiology / Q000662:veterinary*; D013552:Swine
D000907:Antibodies, Bacterial