[Group-specific antibodies to meningococcus of serogroup A in different forms of meningococcal infection].

The authors present analysis of the data obtained in titration in the passive hemagglutination test of the sera obtained from 2498 persons with erythrocytes sensitized with specific polysaccharide of group A meningococcus. It appeared that in children aged under one year, even in those suffering from a generalized form of meningococcus infection, antibodies almost failed to be produced, whereas in older children the mean geometrical of the titre on the 5th-14th days of the disease constituted 1:343. The mean titres in the localized forms (nasopharyngitis and carriership) constituted 1:29.

[Serologic pattern of meningococci in a focus of infection].

The authors present the results of typing of meningococci (isolated from the patients and carriers) by the sera of serological groups A, B, C, D, X, Y, and Z made at the Leningrad Institute of Vaccine and Sera. The causative agents of serological group A were most frequently isolated from the patients with the generalized forms of meningococcus infection. The percentage of detection of meningococci of serological group A was the greatest in the patients and much less in the carriers in and outside the foci of this infection.

[Biogenic amine metabolism in homeotherms exposed to pesticides of different chemical nature].

Some aspects of the biogenic amines -- serotonin and histamine metabolism in rats and guinea pigs following introduction to them of pesticides of different chemical nature, viz. gamma-isomer of hexachlorcyclohexane (lindane) and dimethyldithiocarbamate zinc (zyram) were studied. These pesticides were found to dissimilarly affect the passage with urine of the principal serotonin metabolite -- 5-oxyindol-acetic acid.