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The authors studied the properties of two polymeres prepared from flagellin by various methods: precipitation with ammonium sulfate with the subsequent centrifugation or treatment with glutaric aldehyde in solution and subsequent gel-chromatography. Molecules of the former (P-I) and of the latter (P-II) were similar by shape, but the mol wt of P-I was greater. The preparations contained common H-antigen and were similar by serological activity. P-I had a very high "priming" activity for mice. P-II was highly immunogenic only within the narrow range of doses, was less immunogenic in comparison with P-II, and, in difference from P-I, induced formation of some amount of 7S-antibodies.

The authors worked out the technique of determining the allergenic activity of the volatiles migrating into the air medium from polymer building materials (PBM). The methods of allergodiagnosis in vitro (the passive hemagglutination test, specific leukocytic agglomeration test, intensification of leukocyte pyroninophilia test) were used to detect sensitization in experiments on guinea pigs. It appeared that PBM could cause atopic allergie reaction under certain dwelling conditions.