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The study of the allergenic properties of thimerosal contained in adsorbed DPT vaccine was carried out. Two variants of this vaccine, with and without thimerosal, as well as thimerosal alone (diluted 1:10,000, which corresponds to the content of this preservative in the vaccine), were used in experiments. The phenomenon of anaphylactic shock, passive dermal anaphylaxis and skin tests were used as test-systems. The injection of each of the two variants of the vaccine induced the state of sensitization in guinea pigs. At the same time no differences in the intensity of manifestations of immediate and delayed hypersensitivity induced by preparations with and without thimerosal were registered. The solution of thimerosal alone exhibited no sensitizing properties.

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For three years 128 pollinosis patients received specific immunotherapy with cereals, weed and tree pollen allergens manufactured by the Scientific and Industrial Amalgamation "Allergen" (Stavropol). For comparison, a group of 42 patients was treated with the corresponding allergens according to the commonly used treatment scheme. Patients who had earlier undergone treatment with water-saline extracts of allergens, that proved to be ineffective, formed a special group. In sensitive patients reaction to the skin test with allergoids was by half less pronounced than reaction to the skin test with allergens. In allergometric titration on the nasal mucosa, reaction to the introduction of allergoids could be registered when they were used at a 10- to 100-fold higher concentration than allergens. The course of specific immunotherapy with allergoids was found to lead to a decrease in the level of allergen-specific IgE antibodies (p > 0.05) and total IgE (p < 0.01). An increase in the level of IgG antibodies was noted (p < 0.01). Specific immunotherapy with allergoids was more effective than that with water-saline extracts of allergens. The use of allergoids made it possible to prescribe specific immunotherapy to a wider circle of patients.

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In comparison with allergens having protein fragments with a molecular weight not exceeding 110 kD, allergoids have been found to consist of larger fragments with a molecular weight of 10-150 kD. Allergoids have less charged components than initial allergens and less antigenic components. Allergoids retain their capacity for stimulating the production of antibodies, specific to all antigenic components.

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The comparative study of allergenic preparations of Dermatophagoides mites [correction of ticks] from different manufacturers and the international standard preparations of such allergens was made. D. pteronyssinus and D. farinae allergens from the USSR and the Netherlands were studied. The samples under study were evaluated in a complex of in vivo and in vitro experiments. The preparations produced in the USSR and in the Netherlands exhibited pronounced specificity, but the allergens of both species from the Netherlands were more active. Some differences in the immunochemical characteristics of the preparations were noted.

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A comprehensive allergological examinations of 92 patients with lesions of the nose and paranasal cavities and 20 essentially healthy subjects was carried out, using skin tests and neutrophil tests. Half of the patients showed sensitization to Staphylococcus aureus and Streptococcus pyogenes allergens, which occurred more frequently in patients with chronic purulent sinusitis. It is recommended to expose such patients to allergological examinations and to prescribe, if indicated, desensitization therapy.

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Modern approaches to the standardization of allergens require the use of not only biological methods, but also a wide range of physicochemical and immunological ones. To obtain Soviet standard samples, the optimum spectrum of methods for their characterization, evaluation and comparison with international standard samples should be definitely selected. After the preliminary study of a number of allergens by different immunochemical methods a set of such methods, including different kinds of electrophoresis, isoelectrofocusing, immunoblotting, etc., are proposed, these methods being considered obligatory for obtaining Soviet standard samples of allergens.

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Sensitization to Candida albicans, Mucor, Cladosporium, Penicillium, Alternaria, Rhizopus nigricans was studied in vitro and in vivo in patients suffering from allergic diseases. The overwhelming majority of the positive responses to skin tests were of the immediate type. In parallel with the immediate responses, delayed ones were recorded in some patients. Positive responses in radioallergosorbent test and in estimation of the neutrophil injury index according to V. A. Fradkin did not always correlate with the skin test results. High titers of total IgE in some cases did not coincide with the titers of specific antibodies.

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The preparations of allergens and allergoids obtained from ragweed, timothy and wormwood pollen, as well as the preparations of allergens from birch and orchard grass pollen differing in the method of their production, have been studied with the use of analytical isoelectric focusing in a thin gel layer. The composition of the preparations of allergoids differs from that of the allergenic preparations from the pollen of the same plant species by the decreased content of protein components detected in this investigation. The main proteins contained in the preparations of allergoids are distributed in the zone of pH 3.5-4.5. Differences in the composition of different batches of the same allergens, manifested by variations in some protein bands or by their absence, have been noted. Protein components with the isoelectric point in the alkaline zone have been detected only in the preparations of ragweed pollen allergens.

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In the study the author presents the results of in vitro diagnosis of specific allergy by means of a new test. The data on the NDI (Neutrophile Damage Index) test were first published in 1962. The advantages of the NDI test are the following: the test is easy to perform, not time-consuming, and a very little volume of blood is necessary (0.08 ml. of blood for each allergen). The NDI test is widely used to diagnose bacterial, fungal, viral and other sources of infectious allergy. It is used to register autoallergy and sensitivity to antibiotics. The data on the application of the NDI test to diagnose pollen allergy were published. The author discusses the mechanism of the neutrophile reaction to antigen-antibody complex and requirements of allergens used for the NDI test.

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