BACTERIAL QUORUM SENSING AS A MEANS OF COMMUNICATION IN BIOFILMS

Authors

DOI:

https://doi.org/10.11603/1681-2727.2026.1.16164

Keywords:

quorum sensing – QS, biofilm, bacteria, virulence, antibiotic resistance, quorum quenching, QQ

Abstract

Summary. There is no doubt that the bacteria forming human microbiome exist in biofilms. This is a way for bacteria to survive under the influence of many unfavorable host’s factors and the environment. Within biofilms bacteria can communicate through a special quorum sensing (QS) system, which allows them to change their functioning mechanisms depending on population density, increase their virulence, or to maintain their resistance to a range of antibacterial agents.

Some molecular mechanisms of QS both of n Gram-positive and Gram-negative bacteria has been described. According to the different intrinsic signaling molecules, several types of bacterial QS signaling systems have been identified. One of them is the QS system with acyl-homoserine lactone as an intrinsically induced molecule, which exists in Gram-negative bacteria. The second type is associated with oligopeptides and exists in Gram-positive bacteria. The other types are QS systems using furanborate diesters as self-induced molecules are synthesized both in Gram-negative and Gram-positive bacteria. The role of QS system in the development of pathogenic properties and antimicrobial resistance of pathogens such as S. aureus, P. aeruginosa, B. fragilis, which quite often cause nosocomial infections, was analyzed. The possibilities of exogenous coordinated intervention in QS mechanisms and quorum quenching system to suppress bacterial virulence and prevent transfer antimicrobial resistance genes, were outlined.

Author Biographies

S. I. Klymnyuk, I. Horbachevsky Ternopil National Medical University, Ministry of Health of Ukraine

DSc (Medicine), Professor, the Head of the Department of Microbiology, Virology and Immunology, I. Horbachevsky Ternopil National Medical University

L. B. Romanyuk, I. Horbachevsky Ternopil National Medical University, Ministry of Health of Ukraine

PhD (Medicine), Associated Professor of the Department of Microbiology, Virology and Immunology I. Horbachevsky Ternopil National Medical University

N. I. Tkachuk, I. Horbachevsky Ternopil National Medical University, Ministry of Health of Ukraine

PhD (Medicine), Associate Professor at the Department of Microbiology, Virology and Immunology I. Horbachevsky Ternopil National Medical University

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Published

2026-04-20

How to Cite

Klymnyuk, S. I., Romanyuk, L. B., & Tkachuk, N. I. (2026). BACTERIAL QUORUM SENSING AS A MEANS OF COMMUNICATION IN BIOFILMS. Infectious Diseases – Infektsiyni Khvoroby, (1), 46–55. https://doi.org/10.11603/1681-2727.2026.1.16164

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Section

Reviews and lectures
Received 2026-04-18
Accepted 2026-04-18
Published 2026-04-20