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Haudiquet M, Le Bris J, Nucci A, Bonnin RA, Domingo-Calap P, Rocha EPC, Rendueles O. Capsules and their traits shape phage susceptibility and plasmid conjugation efficiency. Nat Commun 2024; 15:2032. [PMID: 38448399 PMCID: PMC10918111 DOI: 10.1038/s41467-024-46147-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 02/14/2024] [Indexed: 03/08/2024] Open
Abstract
Bacterial evolution is affected by mobile genetic elements like phages and conjugative plasmids, offering new adaptive traits while incurring fitness costs. Their infection is affected by the bacterial capsule. Yet, its importance has been difficult to quantify because of the high diversity of confounding mechanisms in bacterial genomes such as anti-viral systems and surface receptor modifications. Swapping capsule loci between Klebsiella pneumoniae strains allowed us to quantify their impact on plasmid and phage infection independently of genetic background. Capsule swaps systematically invert phage susceptibility, revealing serotypes as key determinants of phage infection. Capsule types also influence conjugation efficiency in both donor and recipient cells, a mechanism shaped by capsule volume and conjugative pilus structure. Comparative genomics confirmed that more permissive serotypes in the lab correspond to the strains acquiring more conjugative plasmids in nature. The least capsule-sensitive pili (F-like) are the most frequent in the species' plasmids, and are the only ones associated with both antibiotic resistance and virulence factors, driving the convergence between virulence and antibiotics resistance in the population. These results show how traits of cellular envelopes define slow and fast lanes of infection by mobile genetic elements, with implications for population dynamics and horizontal gene transfer.
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Affiliation(s)
- Matthieu Haudiquet
- Institut Pasteur, Université Paris Cité, CNRS UMR3525, Microbial Evolutionary Genomics, Paris, 75015, France.
- Ecole Doctoral FIRE-Programme Bettencourt, CRI, Paris, France.
| | - Julie Le Bris
- Institut Pasteur, Université Paris Cité, CNRS UMR3525, Microbial Evolutionary Genomics, Paris, 75015, France
- Sorbonne Université, Collège Doctoral, Ecole Doctorale Complexité du Vivant, 75005, Paris, France
| | - Amandine Nucci
- Institut Pasteur, Université Paris Cité, CNRS UMR3525, Microbial Evolutionary Genomics, Paris, 75015, France
| | - Rémy A Bonnin
- Team Resist UMR1184 Université Paris Saclay, CEA, Inserm, Le Kremlin-Bicêtre, Paris, France
- Service de bactériologie, Hôpital Bicêtre, Université Paris Saclay, AP-HP, Le Kremlin-Bicêtre, Paris, France
- Centre National de Référence Associé de la Résistance aux Antibiotiques, Le Kremlin-Bicêtre, Paris, France
| | - Pilar Domingo-Calap
- Instituto de Biología Integrativa de Sistemas, Universitat de València-CSIC, 46980, Paterna, Spain
| | - Eduardo P C Rocha
- Institut Pasteur, Université Paris Cité, CNRS UMR3525, Microbial Evolutionary Genomics, Paris, 75015, France.
| | - Olaya Rendueles
- Institut Pasteur, Université Paris Cité, CNRS UMR3525, Microbial Evolutionary Genomics, Paris, 75015, France.
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Arena F, Menchinelli G, Di Pilato V, Torelli R, Antonelli A, Henrici De Angelis L, Coppi M, Sanguinetti M, Rossolini GM. Resistance and virulence features of hypermucoviscous Klebsiella pneumoniae from bloodstream infections: Results of a nationwide Italian surveillance study. Front Microbiol 2022; 13:983294. [PMID: 36204614 PMCID: PMC9531727 DOI: 10.3389/fmicb.2022.983294] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 07/25/2022] [Indexed: 11/13/2022] Open
Abstract
Among Enterobacterales, Klebsiella pneumoniae (Kp) is one of the major opportunistic pathogens causing hospital-acquired infections. The most problematic phenomenon linked to Kp is related to the dissemination of multi-drug resistant (MDR) clones producing carbapenem-hydrolyzing enzymes, representing a clinical and public health threat at a global scale. Over the past decades, high-risk MDR clones (e.g., ST512, ST307, ST101 producing blaKPC–type carbepenemases) have become endemic in several countries, including Italy. Concurrently, the spread of highly virulent Kp lineages (e.g., ST23, ST86) able to cause severe, community-acquired, pyogenic infections with metastatic dissemination in immunocompetent subjects has started to be documented. These clones, designated as hypervirulent Kp (hvKp), produce an extensive array of virulence factors and are highly virulent in previously validated animal models. While the prevalence and distribution of MDR Kp has been previously assessed at local and national level knowledge about dissemination of hvKp remains scarce. In this work, we studied the phenotypic and genotypic features of hypermucoviscous (HMV, as possible marker of increased virulence) Kp isolates from bloodstream infections (BSI), obtained in 2016–17 from 43 Italian Laboratories. Antimicrobial susceptibility testing, whole genome sequencing and the use of two animal models (G. mellonella and murine) were employed to characterize collected isolates. Over 1502 BSI recorded in the study period, a total of 19 Kp were selected for further investigation based on their HMV phenotype. Results showed that hvKp isolates (ST5, ST8, ST11, ST25) are circulating in Italy, although with a low prevalence and in absence of a clonal expansion; convergence of virulence (yersiniabactin and/or salmochelin, aerobactin, regulators of mucoid phenotype) and antimicrobial-resistance (extended-spectrum beta-lactamases) features was observed in some cases. Conventional MDR Kp clones (ST307, ST512) may exhibit an HMV phenotype, but with a low virulence potential in the animal models. To the best of our knowledge, this work represents the first systematic survey on HMV and hvKp in Italy, employing a functional characterization of collected isolates. Future surveillance programs are warranted to monitor the threatening convergence of virulence and resistance among MDR Kp and the spread of hvKp.
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Affiliation(s)
- Fabio Arena
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
- Microbiology and Virology Unit, University Hospital “Riuniti,”, Foggia, Italy
- Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS) Don Carlo Gnocchi ONLUS, Florence, Italy
- *Correspondence: Fabio Arena,
| | - Giulia Menchinelli
- Dipartimento di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario A. Gemelli Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy
| | - Vincenzo Di Pilato
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
| | - Riccardo Torelli
- Dipartimento di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario A. Gemelli Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy
| | - Alberto Antonelli
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
- Microbiology and Virology Unit, Florence Careggi University Hospital, Florence, Italy
| | | | - Marco Coppi
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
- Microbiology and Virology Unit, Florence Careggi University Hospital, Florence, Italy
| | - Maurizio Sanguinetti
- Dipartimento di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario A. Gemelli Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Gian Maria Rossolini
- Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS) Don Carlo Gnocchi ONLUS, Florence, Italy
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
- Microbiology and Virology Unit, Florence Careggi University Hospital, Florence, Italy
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Sadek HS, El-Marssafy LH, Hussein FF. First report of rare persistence granulomatous extra respiratory Rhinoscleroma of oral pathology. Microb Pathog 2022; 164:105451. [DOI: 10.1016/j.micpath.2022.105451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/14/2022] [Accepted: 02/15/2022] [Indexed: 10/19/2022]
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Mariz BALA, Sánchez-Romero C, Romañach MJ, de Almeida OP, Carlos R. Respiratory scleroma: A clinicopathologic study of 51 cases from Guatemala. Oral Dis 2020; 26:670-676. [PMID: 31869492 DOI: 10.1111/odi.13264] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/03/2019] [Accepted: 12/17/2019] [Indexed: 12/19/2022]
Abstract
OBJECTIVES To evaluate clinical and pathologically cases of respiratory scleroma diagnosed in a 30-year period in Guatemala. MATERIAL AND METHODS Fifty-one cases of respiratory scleroma diagnosed from 1988 to 2018 in a single pathology service in Guatemala were confirmed using Warthin-Starry staining. Immunohistochemical reactions against CD68, LCA, CD20, CD3, and CD138 were performed to illustrate the inflammatory infiltrate. Scanning electron microscopy (SEM) was performed to illustrate bacteria morphology. RESULTS All 51 cases affected patients from poor areas of Guatemala, particularly women (66.7%), with a mean age of 31 years (range 7-66 years). Nose was affected in most cases (96.1%). Other sites involved included pharynx, larynx, palate, maxillary sinuses, and upper lip. Depending on the stage, the disease manifested as ulcerations, nasal deformities, or laryngeal stenosis. Nasal obstruction, epistaxis, dysphonia, fetid discharge, and pain were the main symptoms. Mikulicz cells (CD68+) in a plasma cell-rich inflammatory background (CD138+, CD20+, CD3+/-) were the typical microscopic presentation. In SEM, each macrophagic vacuole contained few to dozens of Klebsiella rhinoscleromatis diplobacilli. Treatment consisted of long-term trimethoprim and sulfamethoxazole, with adequate control of disease. CONCLUSION Respiratory scleroma is a rare infectious disease affecting the upper respiratory tract, in poor regions of the world, including Guatemala.
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Affiliation(s)
- Bruno A L A Mariz
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Celeste Sánchez-Romero
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil.,Molecular Pathology Area, Faculty of Dentistry, Universidad de la República, Montevideo, Uruguay
| | - Mário J Romañach
- Department of Oral Diagnosis and Pathology, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Oslei P de Almeida
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas, Piracicaba, Brazil
| | - Román Carlos
- Centro Clínico de Cabeza y Cuello, Guatemala City, Guatemala
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Mandale MS, Bhavthankar JD, Humbe JG, Kaorey NN. Rhinoscleroma: Report of an Erratic Palatal Swelling. Contemp Clin Dent 2018; 9:S365-S368. [PMID: 30294174 PMCID: PMC6169265 DOI: 10.4103/ccd.ccd_282_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Clinicians come across cases of palatal swellings that present with ambiguous features. They may vary in their etiology from numerous infectious and noninfectious causes to a wide array of neoplasms. Accurate diagnosis of such lesions is vital for their prompt and precise management. Rhinoscleroma (RS), as its name suggests, is a persistent, specific, granulomatous disease that results in sclerosis of the affected organ - most frequently the nose. Although its occurrence in the adjacent sites has been reported, the clinical findings did not offer much deviation from the expected. Reported here is a case of RS involving the palate which not only detoured from its usual site and course of spread but also gave off a confusing façade in terms of its clinical presentation.
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Affiliation(s)
- Mandakini Subhash Mandale
- Department of Oral Pathology and Microbiology, Government Dental College and Hospital, Aurangabad, Maharashtra, India
| | - Jyoti Dilip Bhavthankar
- Department of Oral Pathology and Microbiology, Government Dental College and Hospital, Aurangabad, Maharashtra, India
| | - Jayanti Govind Humbe
- Department of Oral Pathology and Microbiology, Government Dental College and Hospital, Aurangabad, Maharashtra, India
| | - Nivedita Nishant Kaorey
- Department of Oral Pathology and Microbiology, Government Dental College and Hospital, Aurangabad, Maharashtra, India
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