Typing the gonococcus.

The capsule of the gonococcus

16 strains of Neisseria gonorrhoeae were subjected to several established techniques for capsule demonstration by light microscopy. In all strains examined, encapsulation of the gonococcus was demonstrated. Although the capsules were somewhat more easily seen in strains recently isolated from clinical material, organisms that had been passaged for several years also were encapsulated as were al...

Surface structures of the gonococcus.

Studies on Gonococcus Infection

The four colony types of several different strains of gonococci were isolated by selective transfers on agar. These colony variants differed in the degree of autoagglutination which occurred when they were grown in fluid medium. It was found that this clumping behavior was related to the colonial type, with type 2 isolates exhibiting the greatest autoagglutination followed by types 3, 1, and 4....

The Carbohydrates of Gonococcus and Meningococcus

The alcohol-insoluble polysaccharides of gonococcus and meningococcus were found to contain 4.2 and 3.7 per cent nitrogen respectively, to be protein-free by chemical test, to reduce FehIing-Benedict solution only after hydrolysis. They were non-toxic for rabbits and mice, and failed to engender antibodies (precipitins) in rabbits. They produced no cutaneous reactions in normal, snuffle-free ra...

Copper versus the gonococcus in vivo.

The bactericidal activity of copper and its salts has been generally found to be of a low order in vitro by such authorities as Porter (1946) and Sprowls and Poe (1943). At the beginning of 1973 our attention was drawn to the fact that copper salts in certain concentrations had in fact been found to be toxic to gonococci. Fiscina, Oster, Oster, and Swanson (1973), working at the Mount Sinai Med...