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Updated: May 16, 2026

T4 Bacteriophage and E. coli Interaction in the Murine Intestine: A Prototypical Model for Studying Host-Bacteriophage Dynamics In Vivo
Published on: January 26, 2024
[Some immunological changes in children with bacterial infections treated with bacteriophages]
Insights
Children treated with oral bacteriophages develop neutralizing antibodies, potentially limiting therapy duration. Antibody production is lower in infants, suggesting greater efficacy in this age group for bacterial infections.
Area of Science:
- Immunology
- Microbiology
- Pediatrics
Context:
- Bacterial infections in children are a significant health concern.
- Bacteriophage therapy offers an alternative to antibiotics for bacterial infections.
- Oral administration of bacteriophage cocktails is increasingly explored in pediatric care.
Purpose:
- To investigate immunological changes, specifically antibody production, in children receiving oral bacteriophage therapy.
- To assess the impact of age on the immune response to bacteriophage preparations.
- To determine if antibody formation limits the efficacy or duration of bacteriophage treatment.
Summary:
- This study analyzed serum samples from 65 children with various bacterial infections treated with oral bacteriophage cocktails.
- Anti-phage neutralizing antibodies were detected in children, with prevalence increasing with age and treatment duration.
- Antibody production was significantly lower in infants under one year, indicating a potentially more effective therapeutic window.
Impact:
- The development of anti-phage antibodies may limit the duration and re-usability of bacteriophage therapy in children.
- Findings suggest bacteriophage therapy could be more effective in younger infants due to a reduced immune response.
- This research informs clinical decisions regarding the application and monitoring of bacteriophage treatments in pediatric populations.
Abstract:
The aim of the study was to reveal the possible immunological changes in children with bacterial infections treated with commercial bacteriophage preparations administered per os. In case of medical indications (for treatment or diagnostic) blood sampling was carried out. In serum the antibodies against bacteriophage preparations - phage cocktail components (phages against Staphylococcus, Streptococcus, Proteus vulgaris, Escherichia coli, Pseudomonas aeruginosa) were investigated. The neutralisation reaction was used. There were processed samples from 65 children with following diagnoses: sepsis, bacterial pneumonia, urinary tract infection, bacterial infections of upper respiratory ways, bacterial diarrhea. In samples taken in the first days of treatment antibodies were revealed in infants up to one month (I group) in 0/29 cases - 0%, in infants aged from one month till one year (II group)- 1/25 - 4.0%, in children aged from 1 till 15 years (III group) - 3/9 - 33.3%; data after 14-20 days from the beginning of treatment - I group - 0/9 - 0%, II group - 4/15 - 26.7%, III group - 5/5 - 100%; data after 30-60 days from the beginning of the treatment - I group - 1/5 - 20.0%, II group - 6/10 - 60.0%, III group - 3/3 - 100%. Bacteriophages neitralisation degree varied between 50,7% and 97.3%. Any regularity regarding different components of used phage preparations was not established. In case of inclusion of commercial phage preparations administered per os in the treatment of bacterial infections in children, the anti-phage neutralizing antibodies are produced by the macroorganism. This fact limits the duration of phage therapy and its usage in the treatment of future bacterial infections in treated patients. Production of anti-phage antibodies in young infants is substantially less expressed and this indicates to purposefulness and presumably higher efficacy of bacteriophage therapy in this age period.
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