Abstract
It is known1-6 that H antigens of Salmonella can be markedly changed by cultivating the organisms in serum containing agglutinins for the flagellar components. Excepting S. abortus-equi 4 and S. paratyphi A, 5 all antigens so obtained have had little or no relationship to naturally occurring H antigens of the genus, and have been referred to as induced or artificial forms. Whether these are minor components of the flagellar complex brought into prominence, or artifacts produced by action of the serum, has been the subject of some discussion. Hitherto, such forms have not been recognized in nature, although Eriksson and Malmströ 7 found agglutinins for an induced phase of S. newport in the serum of a patient infected with that type. The present note records the occurrence in nature of antigens apparently identical with those obtained by cultivation of Salmonella in agglutinating serum.
Since April, 1945, 14 cultures received from Connecticut, Maryland, Florids, Illinois, California and Uruguay, were apparently monophasic variants of S. minnesota, which had the formula XXI, XXVI:b. Phase 2 (e,n,x,…) could not be demonstrated. When stabbed into semi-solid agar containing b serum, the cultures were either confined to the site of inoculation or produced one or 2 small bulbs of spreading growth which
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