Aim. To assess the rate of sensitization to the grades of apples of various colours and analyze the association of the obtained indices and total sIgE levels of these grades with the severity of atopic dermatitis. Materials and methods. The blood sera of 215 patients, suffering from alimentary allergy, were studied. The detection rate of sensitization and that of specific immunoglobulin E (sIgE) concentration sum to allergens of apple grades with various coating colours as well as the association of these indices with the degree of severity of atopic dermatitis (AD) was analyzed. Test-systems were used for immune-enzyme analysis of production. Statistical analysis of the obtained results was performed using the program “MedStat” (Donetsk). Results. It was shown that the detection rate of sensitization to the grades with mixed red colour is reliably higher (p < 0.001) compared to the grades without coating colour. The degree of AD severity correlates with the total quantity of apple grades, to which sensitization has been revealed (p < 0.01), with the quantity of grades with mixed red colour, to which sensitization has been found (p < 0.01) and with sIgE sum to the grades with mixed red colour (p < 0.01). Reliable differences (p = 0.006) in the degree of severity of atopic dermatitis among persons, sensitized to apple grades and with no sensitization to this fruit were established. Conclusions.The obtained data are to be used when choosing a diet and correcting it for persons with alimentary allergy and atopic dermatitis.

Objective. To assess the effectiveness of the low-dose air ozonation for disinfection of the air in the working room. Materials and methods. We investigated 90 air samples (3 samples were taken weekly before and after the production meeting using the automatic sampling device of biological aerosols of air PU-1B). The total bacterial contamination, the content of staphylococci and mold spores were determined. Ozonation of the room (83.3 m3) was carried out for 20 minutes by means of domestic ozonator. The accumulated dose of ozone was 133.3 mg (1.6 mg/m3). Statistical data processing was carried out using the MedStat licensed program. The median, median error (Me me), left and right 95 % confidence intervals (95 % CI) were calculated. Paired comparisons were made using Wilcoxon's T-test. Results. After the meeting, the total bacterial contamination of the air was 56.0 9.3 (47.078.0) CFU. The content of staphylococci and mold spores in the air was 85.5 12.5 (76.0100.0) and 44.5 6.5 (32.054.0) CFU, respectively. After ozonation, the total bacterial contamination of the air was 14.5 3.6 (10.021.0) CFU. The content of staphylococci and mold spores in the air after ozonation was 35.5 6.7 (25.052.0) and 26.0 5.0 (18.032.0) CFU, respectively. Ozonation of the room provided a significant decrease (p 0.001) in all three of the above indicators. The room ozonation carried out promoted a reliable decrease (p 0.001) in all the above mentioned parameters. Conclusions. The above data and analysis of the literature show the possibility of using low doses of ozone for the prevention of bacterial, fungal and viral infections including SARS-CoV-2. Further study and development of reasonable modes of ozone disinfection, including low doses of ozone, is needed, as well as determination of the efficiency degree of air disinfection with non-toxic gas concentrations.