Published online by Cambridge University Press: 15 May 2009
Co-agglutination between the somatic agglutinins of B. typhosus and B. paratyphosus B occurs more frequently than between the flagellar agglutinins in the sera of typhoid and paratyphoid B fever cases. These co-agglutinins may develop early or late in the course of the disease.
It is suggested that the agglutinin absorption test is capable of distinguishing whether or not true co-agglutinins have been developed to the flagellar and somatic antigens of B. typhosus or B. paratyphosus B.