Efficacy of a probiotic preparation in the treatment of experimental Salmonella infection: Optimization of dosage and administration regimen in a laboratory animal model

  • Pavel A. Vyushinsky Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences https://orcid.org/0000-0002-7830-1757
  • Aleksey I. Laishevtsev Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences https://orcid.org/0000-0002-5050-2274
  • Vasiliy A. Savinov Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences https://orcid.org/0000-0003-1891-0005
  • Anastasiya V. Supova Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences https://orcid.org/0000-0003-0728-538X
  • Pavel N. Shastin Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences https://orcid.org/0000-0001-7360-927X
  • Alla V. Khabarova Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences https://orcid.org/0000-0002-2115-1882
  • Ekaterina G. Ezhova Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences https://orcid.org/0009-0007-1578-6594
Keywords: probiotics, Lactobacillus, salmonellosis, therapy, laboratory mice

Abstract

Background. Salmonellosis remains one of the most common intestinal infections posing a serious threat to both animals and humans. With the growing antibiotic resistance, the search for alternative treatment methods becomes increasingly relevant. Probiotics based on Lactobacillus strains show promising potential due to their ability to suppress pathogen growth, strengthen the intestinal barrier, and modulate immune response.

Materials and methods. The study was conducted on 168 inbred C57BL/6 mice (84 males and 84 females). A salmonellosis infection model was reproduced through oral inoculation with Salmonella enterica ser. typhimurium. Animals received a multi-strain probiotic (11 Lactobacillus strains) in three doses (1, 2, 3 therapeutic doses) administered in 1-, 7-, and 14-day courses. Clinical parameters (body weight, food intake), hematological and biochemical markers, as well as pathogen shedding dynamics in feces were evaluated.

Results. Course administration of the probiotic (7 and 14 days) resulted in significant body weight gain (average 15-22% compared to placebo) and normalization of food intake. Hematological analysis revealed reduced leukocytosis and normalized hemoglobin levels, particularly pronounced in the 14-day course. Biochemical parameters, including liver enzyme activity (ALT, AST) and albumin levels, also approached physiological norms. The greatest efficacy was observed with the two-week course.

Conclusion. The obtained data confirm that probiotic therapy could be a promising approach for salmonellosis treatment, especially in the context of increasing antibiotic resistance. The developed preparation may serve as an alternative to antibiotics for mild and moderate disease forms while minimizing dysbiosis risk. However, additional preclinical studies are required to confirm its effectiveness and safety in order to be introduced into clinical practice.

EDN: NTPIAB

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Author Biographies

Pavel A. Vyushinsky, Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences

Junior Researcher

Aleksey I. Laishevtsev, Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences

Candidate of Biological Sciences, Acting Head of Laboratory, Leading Researcher

Vasiliy A. Savinov, Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences

Candidate of Biological Sciences, Senior Researcher

Anastasiya V. Supova, Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences

Researcher

Pavel N. Shastin, Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences

Candidate of Veterinary Sciences, Senior Researcher

Alla V. Khabarova, Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences

Junior Researcher

Ekaterina G. Ezhova, Federal Scientific Center – K.I. Skryabin and Y.R. Kovalenko All-Russian Research Institute of Experimental Veterinary Medicine of the Russian Academy of Sciences

Junior Researcher

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Published
2025-12-30
How to Cite
Vyushinsky, P., Laishevtsev, A., Savinov, V., Supova, A., Shastin, P., Khabarova, A., & Ezhova, E. (2025). Efficacy of a probiotic preparation in the treatment of experimental Salmonella infection: Optimization of dosage and administration regimen in a laboratory animal model. Siberian Journal of Life Sciences and Agriculture, 17(6-1). https://doi.org/10.12731/2658-6649-2025-17-6-1-1342
Section
Biochemistry, Genetics and Molecular Biology