Relevance. Until recently, the issues of changes in immunological and microbiological parameters of the oropharynx in vaccinated against viral infections remain insufficiently covered.
Objective: to determine the effect of parenteral influenza vaccination on the cellular and microbial composition of the oropharyngeal secretion in patients with chronic inflammatory diseases of the upper respiratory tract with the presence of anamnestic antibodies to vaccine strains of viruses.
Materials and methods. Oropharyngeal secretion samples of 18 patients with chronic inflammatory diseases of the upper respiratory tract studied before and 3, 12, and 36 weeks after vaccination with inactivated split influenza vaccine. As control 25 donors were used. The cell composition of the sediment was determined. A microbiological study of the oropharyngeal secretion was performed.
Results. At 3 and 12 weeks after vaccination, vaccinated patients significantly changed the relative rates of entry into the oropharyngeal secretion of lymphocytes and the composition of its microbiota while maintaining its total number. After 36 weeks, the cell composition and the representation of pathogenic and opportunistic microflora practically returned to baseline with a significant increase in the total microbiota.
Conclusions. Parenteral administration of inactivated split vaccine to persons with chronic inflammatory diseases of the upper respiratory tract with the presence in the blood of anamnestic antibodies to vaccine strains of viruses is accompanied by a simultaneous temporary increase in lymphocyte representation with a simultaneous decrease in the number of transfusion microflora in the oropharyngeal secretion.
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