Using the indirect fluorescent antibody technique, the production of antiflagellar and antisomatic antibodies in rabbits immunized with different P. aeruginosa strains is measured. After 6 injections of formalinized cultures in graded doses over 3 weeks, the antiflagellar antibodies reach the peak in the 4th to 5th week, followed by a rapid fall. The antisomatic antibodies reacting with native and boiled cells show a plateau-shaped maximum from the 3rd to 5th/6th week and fell slightly up to the 11th week. A significant dissociation of antiflagellar and antisomatic antibodies, however, is not observed. The antisomatic antibodies are less absorbed by protein A (Staph. aureus) than are the antiflagellar antibodies.
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