[Experience with the use of an immunoglobulin erythrocyte preparation for the early laboratory diagnosis of pseudotuberculosis]. / Opyt primeneniia immunoglobulinovogo éritrotsitarnogo preparata dlia rannei laboratornoi diagnostiki psevdotuberkuleza.

An immunoglobulin erythrocytic preparation for the rapid detection of Yersinia pseudotuberculosis was developed. The preparation was shown to be specific and sufficiently sensitive (8 x 10(5) microbial cells/ml). The preparation was used for the examination of 102 patients; in 62 of these patients the diagnosis was confirmed by means of common laboratory and clinical methods. Y. pseudotuberculosis antigen was detected in the blood of 39 patients (63%), and in 12 patients (29.4%) the results of traditional laboratory tests were negative. In 19 out of 23 patients the coincidence of the results of bacteriological and seroindication study was registered. During the study of the remaining 40 patients the antigen was detected only in 6 patients, including 3 patients with enteric yersiniosis.

[Differential traits and antigenic properties of the S- and R-forms of Neisseria meningitidis]. / Differentsial'nye priznaki i antigennye svoistva S i R-form Neisseria meningitidis

The authors demonstrated a marked dissociation of the Neisseria meningitis cultures and the capacity to their rapid change from S- to R-forms. Differential signs of the S- and R-forms are described. Differences in the degree of dissociation of the cultures depending on their origin were shown: strains isolated from the cerebrospinal fluid and the blood of patients with meningitis proved to be less dissociated, and those isolated from carriers--more dissociated. Transfers from media to media and adaptation of cultures to artificial nutrient media produced the greatest influence on dissociation of the freshly isolated strains.