Abstract
The ability of 19 different Bordetella bronchiseptica isolates and 25 Pasteurella multocida isolates to adhere in vitro to porcine nasal and tracheal epithelial cells was examined. It was found that B. bronchiseptica adhered well to upper respiratory tract cells. In contrast the number of P. multocida organisms which adhered was four to six times less than the number of B. bronchiseptica adherent organisms. This difference was statistically significant (p less than 0.0001). Both microorganisms adhered in greater numbers to nasal cells than to tracheal cells (p less than 0.005). The data indicated that B. bronchiseptica possesses a greater ability than P. multocida to attach to porcine upper respiratory tract cells.
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