Passive immunization versus adhesion of Bordetella avium to the tracheal mucosa of turkeys.
Three-week-old turkeys were passively immunized with convalescent serum or treated with tracheal washings from turkeys infected with Bordetella avium. Western blot analysis of the convalescent serum and tracheal washings revealed at least two bands of interaction with outer membrane protein preparations of B. avium. Adherence of B. avium in vivo to tracheal mucosa was determined and compared in treated and untreated turkeys. Passive immunization with convalescent serum reduced adherence of B. avium to the tracheal mucosa in a dose- and time-dependent manner. Adherence was significantly inhibited (P less than 0.01) when turkeys were treated intravenously with 1 ml of undiluted serum either 1 or 6 hours previously. Incubation of the bacterial inoculum with convalescent tracheal washings or application of the washings to tracheal segments before adherence determination in vivo resulted in a significant (P less than 0.01) decrease in adherence. These results indicate that adherence of B. avium to tracheal mucosa is inhibited by substances (antibody) present in both serum and tracheal secretions of convalescent turkeys.
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Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames 50011.
Hellwig
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DH
D000818:Animals; D000831:Animals, Newborn; D000907:Antibodies, Bacterial / Q000276:immunology; D001422:Bacterial Adhesion; D015153:Blotting, Western; D001884:Bordetella / Q000276:immunology / Q000502:physiology*; D001885:Bordetella Infections / Q000276:immunology / Q000382:microbiology / Q000662:veterinary*; D007116:Immunization, Passive; D009092:Mucous Membrane / Q000276:immunology / Q000382:microbiology; D011201:Poultry Diseases / Q000276:immunology / Q000382:microbiology; D014132:Trachea / Q000276:immunology / Q000378:metabolism / Q000382:microbiology*; D014422:Turkeys / Q000276:immunology*
D000907:Antibodies, Bacterial