[Stable erythrocyte reagents for detecting antigen-binding lymphocytes]. / Stabil'nye éritrotsitarnye reagenty dlia vyiavleniia antigensviazyvaiushchikh limfotsitov.

Fixation of native chicken red cells with a solution containing 14.4 percent of acetate aldehyde and 0.85 percent of NaCl (pH 7.0-7.2) permitted preparation on the basis of these red cells of stable immunoreagents for the detection of antigen-fixing lymphocytes using any (optimal for the antigen used) procedure. Experiments have demonstrated a high efficacy of detecting staphylococcal, proteus, or Ps. aeruginosa etiology of pyoinflammatory and septic conditions in indirect rosette formation test with the developed immunoreagents. The levels of the detected antigen-fixing lymphocytes varied in the patients from 0.7 to 8.0 percent, the mean value being 2.1 +/- 0.1 percent.

[The diagnostic effectiveness of erythrocyte immunoreagents made from different Pseudomonas aeruginosa antigens]. / Diagnosticheskaia éffektivnost' éritrotsitarnykh immunoreagentov iz razlichnykh antigenov Pseudomonas aeruginosa.

The diagnostic effectiveness of the passive hemagglutination (PHA) tests with the use of erythrocyte diagnostica (ED based on exotoxin A (ETA) and poly- and monovalent ED based on lipopolysaccharides (LPS) isolated from 5 most widespread P. aeruginosa serogroups was compared. 97 patients with different purulent septic diseases and 100 practically healthy adult donors were examined. The treatment of serum samples with 2-mercaptoethanol decreased the diagnostic effectiveness of serological examination. The simultaneous determination of the activity of antibodies to ETA and LPS essentially increased the number of positive results of the PHA tests in patients with bacteriologically confirmed P. aeruginosa infection, but not in patients from whom other bacteria were isolated. Considering the sensitivity and specificity of serological examination, as well as the decrease of the volume of necessary work and the consumption of immunoreagents, the optimum test conditions proved to be ensured by the use of two ED: LPS-based polyvalent ED and ETA-based ED.

[Production of an diagnostic erythrocyte agent from Pseudomonas aeruginosa exotoxin A]. / Poluchenie éritrotsitarnogo diagnostikuma iz ékzotoksina A Pseudomonas aeruginosa.

The sensitization of formolized sheep red blood cells with exotoxin A by means of chromium chloride or glutaraldehyde is more effective with respect to their sensitivity in the passive hemagglutination test than loading by means of amidol, tannin and rivanol. The use of chromium chloride decreases the consumption of exotoxin A 2, 8, 16 and 16 times in comparison with the use of amidol, tannin, rivanol or glutaraldehyde respectively. The high specificity of erythrocyte diagnosticum obtained from exotoxin A by means of chromium chloride is indicated in the study of hyperimmune sera to 22 different antigens of enteric bacteria and staphylococci in the passive hemagglutination test and to 10 different enterobacterial and staphylococcal antigens in the antibody neutralization test.