Gonococci in pus appear in specific clusters in which they are surrounded by organelles and
granules derived from the host cells in which they multiplied. These clusters have been …

Electron-microscope studies are reported in which gonococci grown in cultures are
compared with those present in urethral exudates. Whereas naturally occurring cells …

During 35 months of selective in vitro cultivation, Neisseria gonorrhoeae cells retained their
virulence for humans and were shown to be closely related to a particular colonial …

The fate of three freshly isolated strains of N. gonorrhoeae following phagocytosis by human
or guinea-pig polymorphs was studied in vitro. Less than 1 per cent. of gonococci …

Neisseria gonorrhoeae 188, type 1, was cultured with monolayers of Rhesus monkey kidney
(RE2) cells. Attachment of gonococci to RE2 cells occurred from about 2 h after inoculation …

Phagocytosis of Neisseria gonorrhoeae in tissue cell-cultures may protect it from the lethal
action of bactericidal agents. Type reversal from avirulent to virulent gonococci was not …

The comparative killing of pilated and nonpilated forms of Neisseria gonorrhoeae by human
peripheral blood leukocytes was studied in vitro. Some nonpilated gonococci (T2) were …

Five characteristic types of gonococcal colonies have been recognized. These and the
special optical system needed to differentiate them are described in detail. Certain types …

Colonial varieties of Neisseria gonorrhoeae that are associated with virulence, types 1 and
2, were more resistant to phagocytosis by rabbit exudative polymorphonuclear leukocytes …

The association of in vitro human leukocytes with pilated, type 2 Neisseria gonorrhoeae
exceeds that for nonpilated, type 4 organisms but is less than that for nonpilated, type 4 …