[Serotypes of meningococci isolated in the USSR and the Republic of Cuba].
The results of serotyping of 101 meningococcal strains isolated in the Soviet Union and 23 strains isolated in the Republic of Cuba are presented. Typing within groups was carried out by Frasch's method in the double diffusion test in gel. For this purpose serotype antigens were prepared from each strain. These antigens were used in the test only after their purification by ultracentrifugation. In all cases the prevalence of serotype 2 was revealed. A great number of Cuban strains contained a wide spectrum of type antigens of both protein and lipopolysaccharide nature. Serotype antigen 15 occurred in meningococci isolated both in the USSR and in Cuba. In most cases type 15 occurred in combination with types 2 and 8. The comparison of the results obtained in the serotyping of meningococci isolated in situations, nonepidemic (USSR) and epidemic (Cuba) for serogroup B, gives no grounds for considering type 2 as the "marker of virulence". Probably, this problem will be solved by the differentiation of subtypes within type 2. Attention should be paid to the serotype antigens of the lipopolysaccharide nature with a view to their epidemiological evaluation.
D000942:Antigens, Bacterial / Q000145:classification; D002353:Carrier State / Q000382:microbiology; D003462:Cuba; D006801:Humans; D008585:Meningitis, Meningococcal / Q000382:microbiology; D009345:Neisseria meningitidis / Q000145:classification* / Q000302:isolation & purification / Q000472:pathogenicity; D012703:Serotyping; D014586:USSR; D014774:Virulence
D000942:Antigens, Bacterial
Serotipy meningokokkov, vydelennye v SSSR i Respublike Kuba.