Abstract
A survey recently made in the United States on the regional distribution of auxotypes of Neisseria gonorrhoeae suggested that isolates from different geographic areas often differ in auxotype. A subsequent auxotyping study in Montreal of 901 isolates of N. gonorrhoeae, 15 from patients with disseminated gonococcal infection, proved interesting in many regards. Gonococcal genetic medium, modified by the addition of other amino acids, was used. Most (93%) of the strains isolated from patients with localized infection belonged to one of the following three phenotypes: arginine-, hypoxanthine- and uracil-dependent (44%); prototrophic (33%); and proline-dependent (16%). Of the 15 strains responsible for disseminated infection 14 required arginine, hypoxanthine and uracil for growth.
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