title: Antigenic homology among gram-negative organisms isolated from cattle with clinical mastitis.
abstract: This study examined the degree of serologic homology among mastitis pathogens. Antibodies were raised against the Rc mutant, Escherichia coli O111:B4 (strain J5) and affinity purified against lipopolysaccharide derived from the Ra mutant, Salmonella typhimurium TV119. These antibodies reacted with a battery of unrelated Gram-negative bacteria in whole cell ELISA. Bacteria with strong cross-reactions included a heterologous, smooth E. coli, Salmonella dublin, S. typhimurium, Salmonella newport, and Pseudomonas aeruginosa. Recognition of Klebsiella pneumoniae and Bordetella bronchisepticum was observed, but reactions were weaker than with the other isolates. The reduced recognition of these isolates probably reflects a masking effect of the bacterial capsule and variations in lipopolysaccharide structure. The polyclonal antibody did not recognize a Gram-positive isolate, Staphylococcus aureus. These immunoglobulins were then tested using whole cell ELISA against a panel of bacteria recovered from the mammary glands of cattle with clinical mastitis. Marked reactivity was noted against a variety of Gram-negative pathogens. Gram-positive isolates had lower recognition by Gram-negative core antigen specific immunoglobulin. The results suggest immunization with rough mutant bacteria may have broad application in the prevention of coliform mastitis.
authors.affiliation: Department of Large Animal Surgery and Medicine, Auburn University, AL 36849-5522.
authors.forename: J
authors.initials: J
authors.lastname: Tyler
authors.forename: H
authors.initials: H
authors.lastname: Spears
authors.forename: J
authors.initials: J
authors.lastname: Cullor
authors.forename: W
authors.initials: W
authors.lastname: Smith
authors.forename: R
authors.initials: R
authors.lastname: Nelson
authors.forename: J
authors.initials: J
authors.lastname: Martin
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000276:immunology*; D000942:Antigens, Bacterial / Q000276:immunology*; D001884:Bordetella / Q000276:immunology; D002417:Cattle; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay; D004926:Escherichia coli / Q000276:immunology; D006090:Gram-Negative Bacteria / Q000276:immunology*; D007711:Klebsiella pneumoniae / Q000276:immunology; D008414:Mastitis, Bovine / Q000382:microbiology*; D011550:Pseudomonas aeruginosa / Q000276:immunology; D012475:Salmonella / Q000276:immunology; D012486:Salmonella typhimurium / Q000276:immunology; D013211:Staphylococcus aureus / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial