Biological properties and pathogenetic potential of Weeksellaceae family bacteria
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| Title: | Biological properties and pathogenetic potential of Weeksellaceae family bacteria |
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| Authors: | Ksenia V. Zubova, Victoria A. Kuznetsova, Matvey V. Kanevsky, Olga V. Kondratenko, Elena V. Glinskaya, Olga V. Nechaeva, Anna G. Afinogenova |
| Source: | Инфекция и иммунитет, Vol 15, Iss 3, Pp 505-516 (2025) |
| Publisher Information: | NIIÈM imeni Pastera, 2025. Sankt-Peterburg , 2025. |
| Publication Year: | 2025 |
| Collection: | LCC:Infectious and parasitic diseases |
| Subject Terms: | saprophytic bacteria, cystic fibrosis, virulence genes, enzymatic activity of bacteria, weeksellaceae, flavobacteriales, Infectious and parasitic diseases, RC109-216 |
| Description: | In recent years, the role of former saprophyte bacteria in the etiology of human infectious diseases has become an increasingly pressing issue. Of particular interest are non-fermenting gram-negative bacteria, many of which are members of the rhizobiome in some plants, soil and water microbiome. Increasingly, scientific literature covers cases of infections caused by members of the order Flavobacteriales, namely the genus Chryseobacterium, Elizabethkingia and Empedobacter of the Weeksellaceae family. Microorganisms of the latter are causative agents in several human diseases, including urinary tract and respiratory tract infections. The aim of our study was to investigate the biological properties of bacteria of the genus Chryseobacterium, Elizabethkingia and Empedobacter of the Weeksellaceae family isolated from patients with cystic fibrosis and to assess their pathogenetic potential. To analyze the biological properties and pathogenetic potential, 32 clinical strains of bacteria belonging to the Weeksellaceae family, isolated from biological material samples of the respiratory tract from cystic fibrosis patients, were selected for the study. Differential diagnostic media and plate test systems were used. DNA was isolated using 5X ScreenMix (ZAO Evrogen) and PCR with gel electrophoresis was performed. Bacteria of the Weeksellaceae family are characterized by a wide range of enzymes, especially C. arthrosphaerae and E. meningoseptica. It was found that strains of the Chryseobacterium, Elizabethkingia and Empedobacter genus are carriers of virulence genes, exhibit pathogenicity and participate in chronic respiratory infections in patients with cystic fibrosis. Phenotypic methods for studying enzymatic activity showed that all the examined strains of bacteria of the Weeksellaceae family are characterized by gelatinase activity, and representatives of the genus Chryseobacterium spp. — also by the ability to synthesize plasma coagulase. The potential to produce other enzymes of aggression is less pronounced and was strain specific. Analysis of the genetic profile of virulence factors in the studied bacteria showed that in their genome, genes encoding the enzymes lecithinase, hyaluronidase, elastase and hemolysin were most often found, and in bacteria of the genus Chryseobacterium spp. and Empedobacter spp. — neuroaminidase, which contribute to overcoming tissue barriers, pathogen invasion and spread throughout host tissues. The obtained results and scientific literature data indicate a special clinical role for bacteria of the Weeksellaceae family, which determines the importance of a deep study of the biological properties and virulence factors in members of the genus Chryseobacterium spp., Elizabethkingia spp. and Empedobacter spp. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | Russian |
| ISSN: | 2220-7619 2313-7398 |
| Relation: | https://iimmun.ru/iimm/article/viewFile/17859/2224; https://doaj.org/toc/2220-7619; https://doaj.org/toc/2313-7398 |
| DOI: | 10.15789/2220-7619-BPA-17859 |
| Access URL: | https://doaj.org/article/c52aa0c40d24441489fc689ce8af3bb1 |
| Accession Number: | edsdoj.52aa0c40d24441489fc689ce8af3bb1 |
| Database: | Directory of Open Access Journals |
Nájsť tento článok vo Web of Science | Abstract: | In recent years, the role of former saprophyte bacteria in the etiology of human infectious diseases has become an increasingly pressing issue. Of particular interest are non-fermenting gram-negative bacteria, many of which are members of the rhizobiome in some plants, soil and water microbiome. Increasingly, scientific literature covers cases of infections caused by members of the order Flavobacteriales, namely the genus Chryseobacterium, Elizabethkingia and Empedobacter of the Weeksellaceae family. Microorganisms of the latter are causative agents in several human diseases, including urinary tract and respiratory tract infections. The aim of our study was to investigate the biological properties of bacteria of the genus Chryseobacterium, Elizabethkingia and Empedobacter of the Weeksellaceae family isolated from patients with cystic fibrosis and to assess their pathogenetic potential. To analyze the biological properties and pathogenetic potential, 32 clinical strains of bacteria belonging to the Weeksellaceae family, isolated from biological material samples of the respiratory tract from cystic fibrosis patients, were selected for the study. Differential diagnostic media and plate test systems were used. DNA was isolated using 5X ScreenMix (ZAO Evrogen) and PCR with gel electrophoresis was performed. Bacteria of the Weeksellaceae family are characterized by a wide range of enzymes, especially C. arthrosphaerae and E. meningoseptica. It was found that strains of the Chryseobacterium, Elizabethkingia and Empedobacter genus are carriers of virulence genes, exhibit pathogenicity and participate in chronic respiratory infections in patients with cystic fibrosis. Phenotypic methods for studying enzymatic activity showed that all the examined strains of bacteria of the Weeksellaceae family are characterized by gelatinase activity, and representatives of the genus Chryseobacterium spp. — also by the ability to synthesize plasma coagulase. The potential to produce other enzymes of aggression is less pronounced and was strain specific. Analysis of the genetic profile of virulence factors in the studied bacteria showed that in their genome, genes encoding the enzymes lecithinase, hyaluronidase, elastase and hemolysin were most often found, and in bacteria of the genus Chryseobacterium spp. and Empedobacter spp. — neuroaminidase, which contribute to overcoming tissue barriers, pathogen invasion and spread throughout host tissues. The obtained results and scientific literature data indicate a special clinical role for bacteria of the Weeksellaceae family, which determines the importance of a deep study of the biological properties and virulence factors in members of the genus Chryseobacterium spp., Elizabethkingia spp. and Empedobacter spp. |
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| ISSN: | 22207619 23137398 |
| DOI: | 10.15789/2220-7619-BPA-17859 |