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Maccelli A, Vitanza L, Imbriano A, Fraschetti C, Filippi A, Goldoni P, Maurizi L, Ammendolia MG, Crestoni ME, Fornarini S, Menghini L, Carafa M, Marianecci C, Longhi C, Rinaldi F. Satureja montana L. Essential Oils: Chemical Profiles/Phytochemical Screening, Antimicrobial Activity and O/W NanoEmulsion Formulations. Pharmaceutics 2019; 12:pharmaceutics12010007. [PMID: 31861717 PMCID: PMC7022231 DOI: 10.3390/pharmaceutics12010007] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 12/06/2019] [Accepted: 12/12/2019] [Indexed: 12/11/2022] Open
Abstract
Chemical fingerprints of four different Satureja montana L. essential oils (SEOs) were assayed by an untargeted metabolomics approach based on Fourier-transform ion cyclotron resonance (FT-ICR) mass spectrometry (MS) coupled with either electrospray ionization or atmospheric pressure chemical ionization ion sources. Analysis and relative quantification of the non-polar volatile fraction were conducted by gas chromatography (GC) coupled to MS. FT-ICR MS confirmed significant differences in the polar metabolite composition, while GC-MS analyses confirmed slight fluctuations in the relative amount of major terpenes and terpenoids, known to play a key role in antimicrobial mechanisms. Oil in eater (O/W) nanoemulsions (NEs) composed by SEOs and Tween 20 or Tween 80 were prepared and analyzed in terms of hydrodynamic diameter, ζ-potential and polydispersity index. The results confirm the formation of stable NEs homogeneous in size. Minimum inhibitory and minimum bactericidal concentrations of SEOs were determined towards Gram-positive (Listeria monocytogenes, Staphylococcus aureus, Staphylococcus haemolyticus) and Gram-negative clinical isolates (Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Serratia marcescens). Commercial SEO showed strongest antibacterial activity, while SEO 3 was found to be the most active among the lab made extractions. MIC and MBC values ranged from 0.39 to 6.25 mg·mL−1. Furthermore, a SEO structured in NEs formulation was able to preserve and improve antimicrobial activity.
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Affiliation(s)
- Alessandro Maccelli
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma-Piazzale Aldo Moro 5, 00185 Roma, Italy; (A.M.); (A.I.); (C.F.); (A.F.); (M.E.C.); (S.F.); (M.C.); (C.M.); (F.R.)
| | - Luca Vitanza
- Dipartimento di Sanità Pubblica e Malattie Infettive, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy; (L.V.); (P.G.); (L.M.)
| | - Anna Imbriano
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma-Piazzale Aldo Moro 5, 00185 Roma, Italy; (A.M.); (A.I.); (C.F.); (A.F.); (M.E.C.); (S.F.); (M.C.); (C.M.); (F.R.)
| | - Caterina Fraschetti
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma-Piazzale Aldo Moro 5, 00185 Roma, Italy; (A.M.); (A.I.); (C.F.); (A.F.); (M.E.C.); (S.F.); (M.C.); (C.M.); (F.R.)
| | - Antonello Filippi
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma-Piazzale Aldo Moro 5, 00185 Roma, Italy; (A.M.); (A.I.); (C.F.); (A.F.); (M.E.C.); (S.F.); (M.C.); (C.M.); (F.R.)
| | - Paola Goldoni
- Dipartimento di Sanità Pubblica e Malattie Infettive, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy; (L.V.); (P.G.); (L.M.)
| | - Linda Maurizi
- Dipartimento di Sanità Pubblica e Malattie Infettive, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy; (L.V.); (P.G.); (L.M.)
| | - Maria Grazia Ammendolia
- National Center of Innovative Technologies in Public Health, Italian National Institute of Health, Viale Regina Elena 299, 00161 Rome, Italy;
| | - Maria Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma-Piazzale Aldo Moro 5, 00185 Roma, Italy; (A.M.); (A.I.); (C.F.); (A.F.); (M.E.C.); (S.F.); (M.C.); (C.M.); (F.R.)
| | - Simonetta Fornarini
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma-Piazzale Aldo Moro 5, 00185 Roma, Italy; (A.M.); (A.I.); (C.F.); (A.F.); (M.E.C.); (S.F.); (M.C.); (C.M.); (F.R.)
| | - Luigi Menghini
- Dipartimento di Farmacia, Università G. d’Annunzio Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy;
| | - Maria Carafa
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma-Piazzale Aldo Moro 5, 00185 Roma, Italy; (A.M.); (A.I.); (C.F.); (A.F.); (M.E.C.); (S.F.); (M.C.); (C.M.); (F.R.)
| | - Carlotta Marianecci
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma-Piazzale Aldo Moro 5, 00185 Roma, Italy; (A.M.); (A.I.); (C.F.); (A.F.); (M.E.C.); (S.F.); (M.C.); (C.M.); (F.R.)
| | - Catia Longhi
- Dipartimento di Sanità Pubblica e Malattie Infettive, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy; (L.V.); (P.G.); (L.M.)
- Correspondence: ; Tel.: +39-06-4991-4629
| | - Federica Rinaldi
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma-Piazzale Aldo Moro 5, 00185 Roma, Italy; (A.M.); (A.I.); (C.F.); (A.F.); (M.E.C.); (S.F.); (M.C.); (C.M.); (F.R.)
- Center for Life Nano Science@Sapienza, Fondazione Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy
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Pala S, Conti C, Goldoni P, Silvaggio D, Nicolai M, Schiariti E, Orsi GB. A five year retrospective study on Syphilis in the Sexual Transmitted Disease Centre (STDC) of the teaching Hospital Umberto I in Rome. Ann Ig 2019; 30:66-70. [PMID: 29215133 DOI: 10.7416/ai.2018.2197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVES A retrospective study describing syphilis epidemiological and clinical features in patients referring to an infectious diseases centre in Rome, Italy. METHODS Between January 2011 and December 2015 demographic, behavioral and clinical data were collected from all adult patients attending the Sexually Transmitted Diseases Centre of the Teaching Hospital Umberto I in Rome. RESULTS Overall 723 patients, 495 males and 228 females, with syphilis infection diagnosis were included. Average age 39.6 ± 13.6 years (median 38) was higher in men than women (41.1 ± 13.6 vs. 36.3 ± 13.1; p<0.001). Patients were from Italy (486 or 67.2%), EU (90 or 12.4%), rest of Europe (38 or 5.3 %), Americas (46 or 6.4%), Africa (36 or 5.0%) and Asia (27 or 3.7%). One-hundred-twenty-three (17.0%) presented primary syphilis, 43 (5.9%) secondary syphilis, 8 (1.1%) tertiary syphilis, 246 (34.0%) serological syphilis, 80 (11.1%) preceding syphilis, 56 (7.7%) gravidic syphilis and 167 (23.1%) came to the Sexually Transmitted Diseases Centre to control a preceding syphilis treatment. Fifty-six (24.6%) women were diagnosed with syphilis during their pregnancies. Among Chinese female patients, those pregnant represented 87.5%. There were 100 subjects (13.8%) simultaneously HIV+ and 623 (86.2%) HIV- patients. HIV co-infection affected more frequently men (RR 5.30; CI 2.62 - 10.72; p<0.001). In males HIV co-infection affected more frequently homosexuals (RR 11.72; CI 6.72 - 20.45; p<0.001). Overall HIV co-infection affected more frequently foreign patients, specially from the Americas (26.1%), Africa (25.7%) and Asia (22.2%). CONCLUSION A serious problem of "gravidic syphilis" suggests the need for Public Health preventive action. Also an early diagnosis of both syphilis and HIV infection should be reinforced.
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Affiliation(s)
- S Pala
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - C Conti
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - P Goldoni
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - D Silvaggio
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - M Nicolai
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - E Schiariti
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - G B Orsi
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
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Vitanza L, Maccelli A, Marazzato M, Scazzocchio F, Comanducci A, Fornarini S, Crestoni ME, Filippi A, Fraschetti C, Rinaldi F, Aleandri M, Goldoni P, Conte MP, Ammendolia MG, Longhi C. Satureja montana L. essential oil and its antimicrobial activity alone or in combination with gentamicin. Microb Pathog 2018; 126:323-331. [PMID: 30458252 DOI: 10.1016/j.micpath.2018.11.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 11/13/2018] [Accepted: 11/16/2018] [Indexed: 12/21/2022]
Abstract
Many essential oils (EOs) are screened as potential sources of antimicrobial compounds. EOs from the genus Satureja have recognized biological properties, including analgesic, anti-inflammatory, immunomodulatory, anticancer, and antimicrobial activity. This study aimed to obtain a metabolite profile of commercial essential oil of S. montana L. (SEO) and to evaluate its antimicrobial properties, both alone and combined with gentamicin towards Gram-negative and Gram-positive bacterial strains. Untargeted analyses based on direct infusion Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS) and on GC-MS have provided a high metabolome coverage, allowing to identify carvacrol, cymene and thymol as the major components of commercial SEO. SEO exerted an antimicrobial activity and induced a synergistic interaction with gentamicin against both reference and clinical bacterial strains. A significant reduction of Escherichia coli, Staphylococcus aureus and Listeria monocytogenes biofilm formation was induced by SEO. As a result of SEO treatment, clear morphological bacterial alterations were visualized by scanning electron microscopy: L. monocytogenes and S. aureus showed malformed cell surface or broken cells with pores formation, whereas E. coli displayed collapsed cell surface. These results encourage further studies about bactericidal and antibiotic synergistic effect of SEO for combined therapy in clinical setting as well as in agricultural systems.
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Affiliation(s)
- Luca Vitanza
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Alessandro Maccelli
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Massimiliano Marazzato
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Francesca Scazzocchio
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Antonella Comanducci
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Simonetta Fornarini
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Maria Elisa Crestoni
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Antonello Filippi
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Caterina Fraschetti
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Federica Rinaldi
- Center for Life Nano Science@Sapienza, Fondazione Istituto Italiano di Tecnologia, Viale Regina Elena 291 00161, Rome, Italy
| | - Marta Aleandri
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Paola Goldoni
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Maria Pia Conte
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy
| | - Maria Grazia Ammendolia
- National Center of Innovative Technologies in Public Health, National Institute of Health, Viale Regina Elena, 299 - 00161, Rome, Italy.
| | - Catia Longhi
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Piazzale Aldo Moro, 5 - 00185, Rome, Italy.
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4
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Schifano E, Marazzato M, Ammendolia MG, Zanni E, Ricci M, Comanducci A, Goldoni P, Conte MP, Uccelletti D, Longhi C. Virulence behavior of uropathogenic Escherichia coli strains in the host model Caenorhabditis elegans. Microbiologyopen 2018; 8:e00756. [PMID: 30381890 PMCID: PMC6562141 DOI: 10.1002/mbo3.756] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 09/21/2018] [Accepted: 09/24/2018] [Indexed: 12/14/2022] Open
Abstract
Urinary tract infections (UTIs) are among the most common bacterial infections in humans. Although a number of bacteria can cause UTIs, most cases are due to infection by uropathogenic Escherichia coli (UPEC). UPEC are a genetically heterogeneous group that exhibit several virulence factors associated with colonization and persistence of bacteria in the urinary tract. Caenorhabditis elegans is a tiny, free-living nematode found worldwide. Because many biological pathways are conserved in C. elegans and humans, the nematode has been increasingly used as a model organism to study virulence mechanisms of microbial infections and innate immunity. The virulence of UPEC strains, characterized for antimicrobial resistance, pathogenicity-related genes associated with virulence and phylogenetic group belonging was evaluated by measuring the survival of C. elegans exposed to pure cultures of these strains. Our results showed that urinary strains can kill the nematode and that the clinical isolate ECP110 was able to efficiently colonize the gut and to inhibit the host oxidative response to infection. Our data support that C. elegans, a free-living nematode found worldwide, could serve as an in vivo model to distinguish, among uropathogenic E. coli, different virulence behavior.
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Affiliation(s)
- Emily Schifano
- Department of Biology and Biotechnology, Sapienza University, Rome, Italy
| | - Massimiliano Marazzato
- Department of Public Health and Infectious Diseases, Microbiology Section, Sapienza University, Rome, Italy
| | - Maria Grazia Ammendolia
- National Center of Innovative Technologies in Public Health, National Institute of Health, Rome, Italy
| | - Elena Zanni
- Department of Biology and Biotechnology, Sapienza University, Rome, Italy
| | - Marta Ricci
- Department of Public Health and Infectious Diseases, Microbiology Section, Sapienza University, Rome, Italy
| | - Antonella Comanducci
- Department of Public Health and Infectious Diseases, Microbiology Section, Sapienza University, Rome, Italy
| | - Paola Goldoni
- Department of Public Health and Infectious Diseases, Microbiology Section, Sapienza University, Rome, Italy
| | - Maria Pia Conte
- Department of Public Health and Infectious Diseases, Microbiology Section, Sapienza University, Rome, Italy
| | - Daniela Uccelletti
- Department of Biology and Biotechnology, Sapienza University, Rome, Italy
| | - Catia Longhi
- Department of Public Health and Infectious Diseases, Microbiology Section, Sapienza University, Rome, Italy
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5
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Conte MP, Superti F, Moio M, Ammendolia MG, Longhi C, Aleandri M, Marazzato M, Goldoni P, Parisi P, Borab Z, Palamara AT, Carlesimo B. Bacterial biofilm associated with a case of capsular contracture. New Microbiol 2018; 41:238-241. [PMID: 29874385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 09/05/2018] [Indexed: 06/08/2023]
Abstract
Capsular contracture is one of the most common complications of implant-based breast augmentation. Despite its prevalence, the etiology of capsular contracture remains controversial although the surface texture of the breast implant, the anatomical position of the prosthesis and the presence of bacterial biofilm could be considered trigger factors. In fact, all medical implants are susceptible to bacterial colonization and biofilm formation. The present study demonstrated the presence of microbial biofilm constituted by cocci in a breast implant obtained from a patient with Baker grade II capsular contracture. This suggests that subclinical infection can be present and involved in low grade capsular contracture.
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Affiliation(s)
- Maria Pia Conte
- Department of Public Health and Infectious Diseases, "Sapienza" University, Rome, Italy
| | - Fabiana Superti
- National Centre for Innovative Technologies in Public Health, National Institute of Health, Rome, Italy
| | - Mariagrazia Moio
- Department of Public Health and Infectious Diseases, Pasteur Institute Cenci Bolognetti Foundation, "Sapienza" University, Rome, Italy IRCCS, San Raffaele Pisana, Rome, Italy
| | - Maria Grazia Ammendolia
- National Centre for Innovative Technologies in Public Health, National Institute of Health, Rome, Italy
| | - Catia Longhi
- Department of Public Health and Infectious Diseases, "Sapienza" University, Rome, Italy
| | - Marta Aleandri
- Department of Public Health and Infectious Diseases, "Sapienza" University, Rome, Italy
| | | | - Paola Goldoni
- Department of Public Health and Infectious Diseases, "Sapienza" University, Rome, Italy
| | - Paola Parisi
- Department of Public Health and Infectious Diseases, Pasteur Institute Cenci Bolognetti Foundation, "Sapienza" University, Rome, Italy IRCCS, San Raffaele Pisana, Rome, Italy
| | - Zachary Borab
- Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
| | - Anna Teresa Palamara
- Department of Public Health and Infectious Diseases, "Sapienza" University, Rome, Italy
- Unit of Plastic Surgery "Sapienza" University, Rome, Italy
| | - Bruno Carlesimo
- Department of Public Health and Infectious Diseases, Pasteur Institute Cenci Bolognetti Foundation, "Sapienza" University, Rome, Italy IRCCS, San Raffaele Pisana, Rome, Italy
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6
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Falcone M, Tiseo G, Iraci F, Raponi G, Goldoni P, Delle Rose D, Santino I, Carfagna P, Murri R, Fantoni M, Fontana C, Sanguinetti M, Farcomeni A, Antonelli G, Aceti A, Mastroianni C, Andreoni M, Cauda R, Petrosillo N, Venditti M. Risk factors for recurrence in patients with Clostridium difficile infection due to 027 and non-027 ribotypes. Clin Microbiol Infect 2018; 25:474-480. [PMID: 29964230 DOI: 10.1016/j.cmi.2018.06.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 06/17/2018] [Accepted: 06/19/2018] [Indexed: 12/19/2022]
Abstract
OBJECTIVES Our objective was to evaluate factors associated with recurrence in patients with 027+ and 027- Clostridium difficile infection (CDI). METHODS Patients with CDI observed between January and December 2014 in six hospitals were consecutively included in the study. The 027 ribotype was deduced by the presence of tcdB, tcdB, cdt genes and the deletion Δ117 in tcdC (Xpert® C. difficile/Epi). Recurrence was defined as a positive laboratory test result for C. difficile more than 14 days but within 8 weeks after the initial diagnosis date with reappearance of symptoms. To identify factors associated with recurrence in 027+ and 027- CDI, a multivariate analysis was performed in each patient group. Subdistributional hazard ratios (sHRs) and 95% confidence intervals (95%CIs) were calculated. RESULTS Overall, 238 patients with 027+ CDI and 267 with 027- CDI were analysed. On multivariate analysis metronidazole monotherapy (sHR 2.380, 95%CI 1.549-3.60, p <0.001) and immunosuppressive treatment (sHR 3.116, 95%CI 1.906-5.090, p <0.001) were factors associated with recurrence in patients with 027+ CDI. In this patient group, metronidazole monotherapy was independently associated with recurrence in both mild/moderate (sHR 1.894, 95%CI 1.051-3.410, p 0.033) and severe CDI (sHR 2.476, 95%CI 1.281-4.790, p 0.007). Conversely, non-severe disease (sHR 3.704, 95%CI 1.437-9.524, p 0.007) and absence of chronic renal failure (sHR 16.129, 95%CI 2.155-125.000, p 0.007) were associated with recurrence in 027- CDI. CONCLUSIONS Compared to vancomycin, metronidazole monotherapy appears less effective in curing CDI without relapse in the 027+ patient group, independently of disease severity.
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Affiliation(s)
- M Falcone
- Division of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Pisa, Rome, Italy.
| | - G Tiseo
- Department of Internal Medicine and Medical Specialties, 'Sapienza' University of Rome, Rome, Italy
| | - F Iraci
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Rome, Italy
| | - G Raponi
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Rome, Italy
| | - P Goldoni
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Rome, Italy
| | - D Delle Rose
- Department of Infectious Diseases, University of Rome Tor Vergata, Rome, Italy
| | - I Santino
- Department of Clinical and Molecular Medicine, Azienda Ospedaliera Sant'Andrea, 'Sapienza' University of Rome, Rome, Italy
| | - P Carfagna
- Department of Internal Medicine, Azienda Ospedaliera San Giovanni, Rome, Italy
| | - R Murri
- Institute of Infectious Diseases, Catholic University of Rome, Rome, Italy
| | - M Fantoni
- Institute of Infectious Diseases, Catholic University of Rome, Rome, Italy
| | - C Fontana
- Microbiology Section, University of Rome Tor Vergata, Rome, Italy
| | - M Sanguinetti
- Institute of Microbiology, Catholic University of Rome, Rome, Italy
| | - A Farcomeni
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Rome, Italy
| | - G Antonelli
- Department of Molecular Medicine, 'Sapienza' University of Rome, Rome, Italy
| | - A Aceti
- Infectious Diseases Unit, Azienda Ospedaliera Sant'Andrea, 'Sapienza' University of Rome, Rome, Italy
| | - C Mastroianni
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Rome, Italy
| | - M Andreoni
- Department of Infectious Diseases, University of Rome Tor Vergata, Rome, Italy
| | - R Cauda
- Institute of Infectious Diseases, Catholic University of Rome, Rome, Italy
| | - N Petrosillo
- Clinical and Research Department for Infectious Diseases, National Institute for Infectious Diseases L. Spallanzani, Rome, Italy
| | - M Venditti
- Department of Public Health and Infectious Diseases, 'Sapienza' University of Rome, Rome, Italy
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7
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Scazzocchio F, Mondì L, Ammendolia MG, Goldoni P, Comanducci A, Marazzato M, Conte MP, Rinaldi F, Crestoni ME, Fraschetti C, Longhi C. Coriander ( Coriandrum sativum) Essential Oil: Effect on Multidrug Resistant Uropathogenic Escherichia coli. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200438] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Coriander ( Coriandrum sativum L., Apiaceae) is known for its antimicrobial activity and the aim of this study was to investigate the effect of its essential oil (CDO) against multidrug resistant uropathogenic Escherichia coli (UPEC). CDO was able to inhibit the growth of UPEC strains and propidium iodide uptake, and electron microscopy examination suggested that bacterial structural modifications occurred. The presence of CDO reduced the MIC of gentamicin. E.coli adhesion efficiency on cell monolayers and abiotic surfaces was not affected by subMIC oil concentrations; furthermore, CDO showed cytotoxic activity towards the HEp-2 tumor cell line. These findings contribute to the knowledge about essential oils as sources of potential antimicrobial agents against uropathogenic E. coli and encourage further investigations.
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Affiliation(s)
- Francesca Scazzocchio
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | - Lorenzo Mondì
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | | | - Paola Goldoni
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | - Antonella Comanducci
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | - Massimiliano Marazzato
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | - Maria Pia Conte
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | - Federica Rinaldi
- Center for Life Nano Science@Sapienza, Fondazione Istituto Italiano di Tecnologia, Rome, Italy
| | - Maria Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, Rome, Italy
| | - Caterina Fraschetti
- Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, Rome, Italy
| | - Catia Longhi
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
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8
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Scazzocchio F, Mondì L, Ammendolia MG, Goldoni P, Comanducci A, Marazzato M, Conte MP, Rinaldi F, Crestoni ME, Fraschetti C, Longhi C. Coriander (Coriandrum sativum) Essential Oil: Effect on Multidrug Resistant Uropathogenic Escherichia coli. Nat Prod Commun 2017; 12:623-626. [PMID: 30520610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023] Open
Abstract
Coriander (Coriandruim sativum L., Apiaceae) is known for its antimicrobial activity and the aim of this study was to investigate the effect of its essential oil (CDO) against multidrug resistant uropathogenic Escherichia coli (UPEC). CDO was able to inhibit the growth of UPEC strains and propidium iodide uptake, - and electron microscopy examination suggested that bacterial structural modifications occurred. The presence of CDO reduced the MIC of gentamicin. E.coli adhesion efficiency on cell monolayers and abiotic surfaces was not affected by subMIC oil concentrations; furthermore, CDO showed cytotoxic activity towards the HEp-2 tumor cell line. These findings contribute to the knowledge about essential oils as sources of potential antimicrobial agents against uropathogenic E. coli and encourage further investigations.
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9
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Abstract
Fluoro-substituted flavones and 2-styrykhromones, related to natural and synthetic flavonoids previously described, were prepared, characterized and tested for anti-rhinovirus activity. Structural elucidation of the new compounds was performed by IR, NMR spectra and X-ray crystal structure analysis for 6-fluoro-3-hydroxy-2-styrylchromone. The antiviral potency was evaluated by a plaque reduction assay in HeLa cell cultures infected with rhinoviruses 1B and 14, selected as representative serotypes for viral groups B and A of human rhinoviruses, respectively. In comparison with results previously obtained, the introduction of the fluorine atom seems to exert a positive influence on the activity against serotype 14 while counteracting the effect against serotype 1B.
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Affiliation(s)
- Cinzia Conti
- Dipartimento di Scienze di Sanitá Pubblica, Sezione di Microbiologia, Universitá La Sapienza di Roma, Roma, Italy
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10
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Falcone M, Iraci F, Raponi G, Goldoni P, Belvisi V, Delle Rose D, Santino I, Murri R, Fantoni M, Carfagna P, Sanguinetti M, Fontana C, Farcomeni A, Tiseo G, Aceti A, Cauda R, Vullo V, Mastroianni C, Andreoni M, Venditti M. Nursing home residence is associated with spread of Clostridium difficile ribotype 027 in central Italy. J Hosp Infect 2016; 94:201-3. [DOI: 10.1016/j.jhin.2016.06.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 06/07/2016] [Indexed: 12/19/2022]
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11
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Sauzullo I, Rodio DM, Facchinetti S, Puggioni G, De Angelis M, Goldoni P, Vullo V, Mengoni F, Trancassini M, Pietropaolo V. Diagnostic accuracy of Xpert MTB/RIF versus smear microscopy in the early diagnosis tuberculosis in the real life of "Umberto I" Hospital Rome. New Microbiol 2016; 39:304-306. [PMID: 27551727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 12/19/2016] [Indexed: 06/06/2023]
Abstract
Early diagnosis of tuberculosis (TB) is one of the primary challenges in curtailing the spread of TB. This study aimed to determine the diagnostic accuracy of Xpert MTB/RIF for the identification of M. tuberculosis in clinical specimens, and compare this to a microscopist's diagnostic performance. Xpert MTB/ RIF was positive in all specimens with culture-confirmed TB, giving a higher sensitivity than the smear microscopy (100% versus 63%). The use of the Xpert MTB/RIF, as part of routine assay, permits rapid diagnosis of TB and enables clinicians to start an effective treatment.
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Affiliation(s)
- Ilaria Sauzullo
- Department of Public Health and Infectious Diseases, 'Sapienza' University, Rome, Italy
| | - Donatella Maria Rodio
- Department of Public Health and Infectious Diseases, 'Sapienza' University, Rome, Italy
| | - Samantha Facchinetti
- Department of Public Health and Infectious Diseases, 'Sapienza' University, Rome, Italy
| | - Gianluca Puggioni
- Department of Public Health and Infectious Diseases, 'Sapienza' University, Rome, Italy
| | | | - Paola Goldoni
- Department of Public Health and Infectious Diseases, 'Sapienza' University, Rome, Italy
| | - Vincenzo Vullo
- Department of Public Health and Infectious Diseases, 'Sapienza' University, Rome, Italy
| | - Fabio Mengoni
- Department of Public Health and Infectious Diseases, 'Sapienza' University, Rome, Italy
| | - Maria Trancassini
- Department of Public Health and Infectious Diseases, 'Sapienza' University, Rome, Italy
| | - Valeria Pietropaolo
- Department of Public Health and Infectious Diseases, 'Sapienza' University, Rome, Italy
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12
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Longhi C, Comanducci A, Riccioli A, Ziparo E, Marazzato M, Aleandri M, Conte AL, Lepanto MS, Goldoni P, Conte MP. Features of uropathogenic Escherichia coli able to invade a prostate cell line. New Microbiol 2016; 39:146-149. [PMID: 27196555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 03/02/2016] [Indexed: 06/05/2023]
Abstract
RWPE-1 normal prostate cells were tested as an experimental model for adhesion/invasion assays by genotypically and phenotypically characterized community uropathogenic strains of Escherichia coli (UPEC), a frequent cause of urinary tract infections (UTIs) and significant etiologic agent also in bacterial prostatitis. Adhesive ability and strong biofilm production was significantly associated with the bacterial invasive phenotype. Invasive strains derived mainly from male and pediatric patients. This study suggests that such a cell model could usefully integrate other available methods of urovirulence analysis, to deepen knowledge on the bacterial interaction with host cells.
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Affiliation(s)
- Catia Longhi
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Italy
| | - Antonella Comanducci
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Italy
| | - Anna Riccioli
- Istituto Pasteur-Fondazione Cenci Bolognetti, Department of Anatomy, Histology, Forensic Medicine & Orthopedics, Unit of Histology and Medical Embryology, "Sapienza" University of Rome, Italy
| | - Elio Ziparo
- Istituto Pasteur-Fondazione Cenci Bolognetti, Department of Anatomy, Histology, Forensic Medicine & Orthopedics, Unit of Histology and Medical Embryology, "Sapienza" University of Rome, Italy
| | - Massimiliano Marazzato
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Italy
| | - Marta Aleandri
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Italy
| | - Antonietta Lucia Conte
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Italy
| | - Maria Stefania Lepanto
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Italy
| | - Paola Goldoni
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Italy
| | - Maria Pia Conte
- Department of Public Health and Infectious Diseases, Microbiology Section, "Sapienza" University of Rome, Italy
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Falcone M, Russo A, Iraci F, Carfagna P, Goldoni P, Vullo V, Venditti M. Risk Factors and Outcomes for Bloodstream Infections Secondary to Clostridium difficile Infection. Antimicrob Agents Chemother 2016; 60:252-7. [PMID: 26482315 PMCID: PMC4704211 DOI: 10.1128/aac.01927-15] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Accepted: 10/15/2015] [Indexed: 01/25/2023] Open
Abstract
We determined the incidence, risk factors, and outcomes of bloodstream infections (BSI) subsequent to Clostridium difficile infection (CDI). We performed a retrospective study of all patients with definite diagnosis of CDI admitted from January 2014 to December 2014 in two large hospitals in Rome. Two groups of patients were analyzed: those with CDI and subsequent BSI (CDI/BSI(+)) and those with CDI and no evidence of primary BSI (CDI/BSI(-)). Data about clinical features, microbiology, treatments, and mortality were obtained. Overall, 393 cases of CDI were included in the final analysis: 72 developed a primary nosocomial BSI, while 321 had CDI without microbiological and clinical evidence of BSI. Etiologic agents of BSI were Candida species (47.3%), Enterobacteriaceae (19.4%), enterococci (13.9%), and mixed infections (19.4%). In multivariate analysis, ribotype 027 status (odds ratio [OR], 6.5), CDI recurrence (OR, 5.5), severe CDI infection (OR, 8.3), and oral vancomycin at >500 mg/day (OR, 3.1) were recognized as factors independently associated with the development of nosocomial BSI. Thirty-day mortality from CDI diagnosis was higher for patients of the CDI/BSI(+) group than for the controls (38.9 versus 13.1%; P < 0.001). Among patients of the CDI/BSI(+) group, mortality attributable to primary BSI was as high as 57%. Our findings suggest that severe CDI is complicated by the development of nosocomial BSI. Candida species and enteric bacteria appear to be the leading causative pathogens and are associated with poor outcomes.
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Affiliation(s)
- Marco Falcone
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Alessandro Russo
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Federica Iraci
- Faculty of Medicine, Sapienza University of Rome, Rome, Italy
| | | | - Paola Goldoni
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Vincenzo Vullo
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Mario Venditti
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
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14
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Aleandri M, Conte MP, Simonetti G, Panella S, Celestino I, Checconi P, Marazzato M, Longhi C, Goldoni P, Nicoletti M, Barnich N, Palamara AT, Schippa S, Nencioni L. Influenza A virus infection of intestinal epithelial cells enhances the adhesion ability of Crohn's disease associated Escherichia coli strains. PLoS One 2015; 10:e0117005. [PMID: 25706391 PMCID: PMC4338238 DOI: 10.1371/journal.pone.0117005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 12/17/2014] [Indexed: 12/19/2022] Open
Abstract
Modifications of intestinal glycoreceptors expression, in particular CEACAM6, typically found in ileal Crohn's disease (CD), favor, among the commensal species of microbiota, the enrichment in Escherichia coli. Removal of protein glycosidic residues by neuraminidase, a sialidase typical of influenza virus, increases adhesion ability of Escherichia coli to Caco-2 intestinal cells. In this study we investigated whether influenza virus infection of human intestinal epithelial cells could influence the adhesiveness of different Escherichia coli strains isolated from CD patients by altering surface glycoreceptors. Influenza virus infection of intestinal cells increased exposure of galactose and mannose residues on the cell surface. In particular, glycoreceptors Thomsen-Friedenreich and CEACAM6 were over-expressed in influenza virus infected cells. In the same experimental conditions, a significant increase in bacterial adhesiveness was observed, independently of their own adhesive ability. The increase was reverted by treatment with anti-TF and anti-CEACAM6 antibodies. Interestingly, influenza virus was able to efficiently replicate in human primary intestinal cells leading to TF exposure. Finally, intestinal infected cells produced high levels of pro-inflammatory cytokines compared to control. Overall these data suggest that influenza virus infection, could constitute an additional risk factor in CD patients.
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Affiliation(s)
- Marta Aleandri
- Department of Public Health and Infectious Diseases, “Sapienza” University, Rome, Italy
| | - Maria Pia Conte
- Department of Public Health and Infectious Diseases, “Sapienza” University, Rome, Italy
| | - Giovanna Simonetti
- Department of Public Health and Infectious Diseases, “Sapienza” University, Rome, Italy
| | - Simona Panella
- Department of Public Health and Infectious Diseases, “Sapienza” University, Rome, Italy
- IRCCS San Raffaele Pisana, Telematic University, Rome, Italy, Rome, Italy
| | - Ignacio Celestino
- Department of Public Health and Infectious Diseases, “Sapienza” University, Rome, Italy
- CEINGE-Biotecnologie Avanzate, Naples, Italy
| | - Paola Checconi
- Department of Public Health and Infectious Diseases, Pasteur Institute Cenci Bolognetti Foundation, “Sapienza” University, Rome, Italy
| | | | - Catia Longhi
- Department of Public Health and Infectious Diseases, “Sapienza” University, Rome, Italy
| | - Paola Goldoni
- Department of Public Health and Infectious Diseases, “Sapienza” University, Rome, Italy
| | - Mauro Nicoletti
- Department of Experimental Sciences and Clinics “G. D’Annunzio” University, Chieti, Italy
| | - Nicolas Barnich
- Clermont University, M2iSH, UMR 1071 INSERM/University of Auvergne, Clermont-Ferrand, France
| | - Anna Teresa Palamara
- IRCCS San Raffaele Pisana, Telematic University, Rome, Italy, Rome, Italy
- Department of Public Health and Infectious Diseases, Pasteur Institute Cenci Bolognetti Foundation, “Sapienza” University, Rome, Italy
| | - Serena Schippa
- Department of Public Health and Infectious Diseases, “Sapienza” University, Rome, Italy
| | - Lucia Nencioni
- Department of Public Health and Infectious Diseases, “Sapienza” University, Rome, Italy
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15
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Russo A, Campanile F, Falcone M, Tascini C, Bassetti M, Goldoni P, Trancassini M, Della Siega P, Menichetti F, Stefani S, Venditti M. Linezolid-resistant staphylococcal bacteraemia: A multicentre case-case-control study in Italy. Int J Antimicrob Agents 2014; 45:255-61. [PMID: 25600893 DOI: 10.1016/j.ijantimicag.2014.12.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 10/10/2014] [Accepted: 12/19/2014] [Indexed: 11/24/2022]
Abstract
The aim of this multicentre study was to analyse the characteristics of patients with bloodstream infections due to staphylococcal strains resistant to linezolid. This was a retrospective case-case-control study of patients hospitalised in three large teaching hospitals in Italy. A linezolid-resistant (LIN-R) Staphylococcus spp. group and a linezolid-susceptible (LIN-S) Staphylococcus spp. group were compared with control patients to determine the clinical features and factors associated with isolation of LIN-R strains. All LIN-R Staphylococcus spp. strains underwent molecular typing. Compared with the LIN-S group, central venous catheters were the main source of infection in the LIN-R group. The LIN-R and LIN-S groups showed a similar incidence of severe sepsis or septic shock, and both showed a higher incidence of these compared with the control group. Overall, patients in the LIN-R group had a higher 30-day mortality rate. Multivariate analysis found previous linezolid therapy, linezolid therapy >14 days, antibiotic therapy in the previous 30 days, antibiotic therapy >14 days, previous use of at least two antibiotics and hospitalisation in the previous 90 days as independent risk factors associated with isolation of a LIN-R strain. The G2576T mutation in domain V of 23S rRNA was the principal mechanism of resistance; only one strain of Staphylococcus epidermidis carried the cfr methylase gene (A2503), together with L4 insertion (71GGR72) and L3 substitution (H146Q). LIN-R strains are associated with severe impairment of clinical conditions and unfavourable patient outcomes. Reinforcement of infection control measures may have an important role in preventing these infections.
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Affiliation(s)
- Alessandro Russo
- Department of Public Health and Infectious Diseases, Policlinico Umberto I, 'Sapienza' University of Rome, Viale dell'Università 37, 00161 Rome, Italy
| | | | - Marco Falcone
- Department of Public Health and Infectious Diseases, Policlinico Umberto I, 'Sapienza' University of Rome, Viale dell'Università 37, 00161 Rome, Italy
| | - Carlo Tascini
- UO Malattie Infettive, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy
| | - Matteo Bassetti
- Infectious Diseases Clinic, Santa Maria Misericordia, University Hospital, Udine, Italy
| | - Paola Goldoni
- Department of Public Health and Infectious Diseases, Policlinico Umberto I, 'Sapienza' University of Rome, Viale dell'Università 37, 00161 Rome, Italy
| | - Maria Trancassini
- Department of Public Health and Infectious Diseases, Policlinico Umberto I, 'Sapienza' University of Rome, Viale dell'Università 37, 00161 Rome, Italy
| | - Paola Della Siega
- Infectious Diseases Clinic, Santa Maria Misericordia, University Hospital, Udine, Italy
| | | | | | - Mario Venditti
- Department of Public Health and Infectious Diseases, Policlinico Umberto I, 'Sapienza' University of Rome, Viale dell'Università 37, 00161 Rome, Italy.
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16
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Falcone M, Vena A, Mezzatesta ML, Gona F, Caio C, Goldoni P, Trancassini AM, Conti C, Orsi GB, Carfagna P, Stefani S, Venditti M. Role of empirical and targeted therapy in hospitalized patients with bloodstream infections caused by ESBL-producing Enterobacteriaceae. Ann Ig 2014; 26:293-304. [PMID: 25001119 DOI: 10.7416/ai.2014.1989] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Bloodstream infection (BSI) due to extended-spectrum β-lactamase (ESBL) producing Enterobacteriaceae are a major cause of in-hospital mortality. The effect on survival of empirical and targeted antibiotic therapy in these patients remains controversial. METHODS A prospective cohort study was conducted analyzing data from 94 patients (age 59 ± 21 years) with BSI due to ESBL producing strains (Sixty-one E. coli, 26 K. pneumoniae, 4 Proteus spp and 3 Enterobacter spp). RESULTS Risk factors associated with 21-day mortality at univariate analysis were: recent administration of antibiotic therapy (p=0.049), higher SOFA score (p=0.05), ICU stay (p <0.01), hypotension at presentation (p =0.001) or septic shock (p <0.001) and bacteremia from source other than urinary tract (p=0.03). Regardless of antibiotic class used, no differences in survival were noted between patients receiving or not adequate initial antimicrobial treatment (37.1% vs 23.7% p=0.23); on the other hand, compared with the administration of other in vitro active antibiotics, the use of carbapenem as definitive therapy was associated with a significantly lower 21-day mortality (54.3% vs 28.5% p=0.02). CONCLUSIONS These findings suggest that the administration of an adequate initial therapy is not associated with mortality in hospitalized patients with BSI due to Enterobacteriaceae. The severity of clinical conditions at presentation and the administration of carbapenems as definitive therapy seems to be really important in affecting the outcome of patients with BSI due to ESBL producing strains.
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Affiliation(s)
- M Falcone
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - A Vena
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - M L Mezzatesta
- Department of Bio-Medical Sciences-Section of Microbiology, University of Catania, Italy
| | - F Gona
- Department of Bio-Medical Sciences-Section of Microbiology, University of Catania, Italy
| | - C Caio
- Department of Bio-Medical Sciences-Section of Microbiology, University of Catania, Italy
| | - P Goldoni
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - A M Trancassini
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - C Conti
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | - G B Orsi
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
| | | | - S Stefani
- Department of Bio-Medical Sciences-Section of Microbiology, University of Catania, Italy
| | - M Venditti
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Italy
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17
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Giuliano S, Rubini G, Conte A, Goldoni P, Falcone M, Vena A, Venditti M, Morelli S. Streptococcus anginosus group disseminated infection: case report and review of literature. Infez Med 2012; 20:145-154. [PMID: 22992554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Streptococcus anginosus group is widely known for its ability to cause invasive pyogenic infections. There are very few reports of disseminated infections sustained by members of this streptococcal group. We report a case of a highly disseminated infection and analyse previous literature reports. Disseminated pyogenic infection has been defined as an infection affecting two or more of the following organs/systems: central nervous system, lung, liver and spleen. We performed a PubMed search using the terms: S. milleri, S. anginosus, brain abscess, pulmonary abscess, hepatic abscess, spleen abscess. We reviewed 12 case reports including the one presented in this paper. Underlying conditions such as dental infections, malignancy, gastrointestinal and respiratory tract disease accounted for 42% of cases. No definite endocarditis was encountered, even though positive blood cultures were found in 67% of patients. Concomitant brain-liver, brain-lung and brain-spleen involvement occurred in 50%, 42% and 8% of cases respectively. Ninety-one percent (91%) of patients were treated with β-lactams, and surgical procedures were performed in 67% of patients. Infections caused by S. anginosus group members are satisfactorily treated with penicillin G and cephalosporins. It is very important to associate surgery to antimicrobial chemotherapy in order to achieve a full or nearly full clinical recovery.
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Affiliation(s)
- Simone Giuliano
- Dipartimento di Sanità Pubblica, Università Sapienza, Roma, Italy
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18
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Goldoni P, Sinibaldi L, Valenti P, Orsi N. Metal complexes of lactoferrin and their effect on the intracellular multiplication of Legionella pneumophila. Biometals 2000; 13:15-22. [PMID: 10831220 DOI: 10.1023/a:1009221616623] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The action of bovine lactoferrin saturated with iron, zinc and manganese on the intracellular multiplication of Legionella pneumophila in HeLa cells has been tested. The results obtained showed that lactoferrin did not influence the invasive efficiency of Legionella. The intracellular multiplication of the bacterium was inhibited by apo-lactoferrin and by lactoferrin saturated with manganese and zinc, whereas lactoferrin saturated with iron enhanced the intracellular growth. Experiments in parallel were performed with iron, manganese and zinc citrate to test the effect due to the metal ions alone. Even in this condition the addition of an iron chelate enhanced the multiplication of Legionella while the manganese chelate produced a certain inhibition.
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Affiliation(s)
- P Goldoni
- Institute of Microbiology, University of Rome La Sapienza, Roma, Italy.
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19
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Burenin RA, Vikhlinin AA, Terekhov OV, Tkachenko AY, Sazonov SY, Gilfanov MR, Churazov EM, Sunyaev RA, Goldoni P, Claret A, Goldwurm A, Paul J, Roques JP, Jourdain E, Vedrenne G, Mandrou P. GRANAT/SIGMA observation of GRB 920723 soft gamma-ray afterglow. ACTA ACUST UNITED AC 1999. [DOI: 10.1051/aas:1999295] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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20
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Visca P, Goldoni P, Lück PC, Helbig JH, Cattani L, Giltri G, Bramati S, Castellani Pastoris M. Multiple types of Legionella pneumophila serogroup 6 in a hospital heated-water system associated with sporadic infections. J Clin Microbiol 1999; 37:2189-96. [PMID: 10364584 PMCID: PMC85115 DOI: 10.1128/jcm.37.7.2189-2196.1999] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Five sporadic cases of nosocomial Legionnaires' disease were documented from 1989 to 1997 in a hospital in northern Italy. Two of them, which occurred in a 75-year-old man suffering from ischemic cardiopathy and in an 8-year-old girl suffering from acute leukemia, had fatal outcomes. Legionella pneumophila serogroup 6 was isolated from both patients and from hot-water samples taken at different sites in the hospital. These facts led us to consider the possibility that a single clone of L. pneumophila serogroup 6 had persisted in the hospital environment for 8 years and had caused sporadic infections. Comparison of clinical and environmental strains by monoclonal subtyping, macrorestriction analysis (MRA), and arbitrarily primed PCR (AP-PCR) showed that the strains were clustered into three different epidemiological types, of which only two types caused infection. An excellent correspondence between the MRA and AP-PCR results was observed, with both techniques having high discriminatory powers. However, it was not possible to differentiate the isolates by means of ribotyping and analysis of rrn operon polymorphism. Environmental strains that antigenically and chromosomally matched the infecting organism were present at the time of infection in hot-water samples taken from the ward where the patients had stayed. Interpretation of the temporal sequence of events on the basis of the typing results for clinical and environmental isolates enabled the identification of the ward where the patients became infected and the modes of transmission of Legionella infection. The long-term persistence in the hot-water system of different clones of L. pneumophila serogroup 6 indicates that repeated heat-based control measures were ineffective in eradicating the organism.
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Affiliation(s)
- P Visca
- Laboratorio di Batteriologia e Micologia Medica, Istituto Superiore di Sanità, 00100 Rome, Italy.
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21
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Castellani Pastoris M, Lo Monaco R, Goldoni P, Mentore B, Balestra G, Ciceroni L, Visca P. Legionnaires' disease on a cruise ship linked to the water supply system: clinical and public health implications. Clin Infect Dis 1999; 28:33-8. [PMID: 10028067 DOI: 10.1086/515083] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
The occurrence of legionnaires' disease has been described previously in passengers of cruise ships, but determination of the source has been rare. A 67-year-old, male cigarette smoker with heart disease contracted legionnaires' disease during a cruise in September 1995 and died 9 days after disembarking. Legionella pneumophila serogroup 1 was isolated from the patient's sputum and the ship's water supply. Samples from the air-conditioning system were negative. L. pneumophila serogroup 1 isolates from the water supply matched the patient's isolate, by both monoclonal antibody subtyping and genomic fingerprinting. None of 116 crew members had significant antibody titers to L. pneumophila serogroup 1. One clinically suspected case of legionnaires' disease and one confirmed case were subsequently diagnosed among passengers cruising on the same ship in November 1995 and October 1996, respectively. This is the first documented evidence of the involvement of a water supply system in the transmission of legionella infection on ships. These cases were identified because of the presence of a unique international system of surveillance and collaboration between public health authorities.
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Affiliation(s)
- M Castellani Pastoris
- Department of Bacteriology and Medical Mycology, University La Sapienza, Rome, Italy
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22
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Goldoni P, Cattani L, Carrara S, Pastoris MC, Sinibaldi L, Orsi N. Multiplication of Legionella pneumophila in HeLa cells in the presence of cytoskeleton and metabolic inhibitors. Microbiol Immunol 1998; 42:271-9. [PMID: 9623914 DOI: 10.1111/j.1348-0421.1998.tb02283.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A study has been carried out on the action of cytoskeleton and metabolic inhibitors on intracellular multiplication in HeLa cells of a virulent strain of Legionella pneumophila serogroup 6. The effects of the substances were separately tested on both penetration and intracellular multiplication of L. pneumophila. Only cytochalasin A and 2-deoxy-D-glucose (2dG) affected bacterial internalisation, whereas intracellular multiplication was inhibited by cytochalasins A, B, C, D and J (D being the most active) and by 2dG with a dose-response effect. The action of 2dG was counteracted by 50 mM glucose. Experiments carried out with cytochalasin D and a rhodamine-phalloidin conjugate showed the involvement of cytoskeletal elements in intracellular multiplication of Legionella; compounds acting on microtubules had no effect.
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Affiliation(s)
- P Goldoni
- Istituto di Microbiologia, Università La Sapienza, Rome, Italy. goldoni@axrma, uniromal.it
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23
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Castellani Pastoris M, Ciceroni L, Lo Monaco R, Goldoni P, Mentore B, Flego G, Cattani L, Ciarrocchi S, Pinto A, Visca P. Molecular epidemiology of an outbreak of Legionnaires' disease associated with a cooling tower in Genova-Sestri Ponente, Italy. Eur J Clin Microbiol Infect Dis 1997; 16:883-92. [PMID: 9495668 DOI: 10.1007/bf01700554] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Fatty acid profile analysis, monoclonal antibody (MAb) subtyping, pulsed-field gel electrophoresis (PFGE), arbitrarily primed polymerase chain reaction (AP-PCR), and ribotyping were used to compare clinical and environmental Legionella pneumophila serogroup 1 isolates from an outbreak of Legionnaires' disease presumptively associated with cooling towers. According to the Oxford subtyping scheme, the MAb subtype of patients' isolates and of two strains originating from a cooling tower was Pontiac, whereas the other isolates were subtype Olda. The strains showed no intrinsic strain-to-strain difference in fatty acid profiles, and ribotyping and length polymorphism of the 16S-23S rDNA intervening regions failed to reveal any differences between the isolates. Conversely, PFGE and AP-PCR appeared to be more discriminatory, as the same genomic profile was found for the clinical and some environmental strains. Meteorologic and epidemiological data and the results of molecular analysis of the Legionella pneumophila serogroup 1 isolates support the hypothesis that the infection was transmitted from one of the cooling towers to the indoor environment of the same building, to homes in proximity that had open windows, and to the streets. In fact, the outbreak diminished and later ended after a part in the tower was replaced. This investigation demonstrates the utility of combined molecular methods (i.e., phenotypic and genomic typing) in comparing epidemiologically linked clinical and environmental isolates. Finally, the outbreak confirms the risk of Legionnaires' disease posed by cooling towers, mainly when atmospheric thermal and humidity inversions occur. This finding emphasizes the need to determine whether the source of infection is in the living or working environment or somewhere else.
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Affiliation(s)
- M Castellani Pastoris
- Laboratorio di Batteriologia e Micologia Medica, Istituto Superiore di Sanità, Rome, Italy
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24
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Cattani L, Goldoni P, Pastoris MC, Sinibaldi L, Orsi N. Bafilomycin A1 and intracellular multiplication of Legionella pneumophila. Antimicrob Agents Chemother 1997; 41:212-4. [PMID: 8980784 PMCID: PMC163689 DOI: 10.1128/aac.41.1.212] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Multiplication of Legionella pneumophila in HeLa cells was found to be inhibited by noncytotoxic concentrations of bafilomycin A1, with blockage of bacterial growth at a concentration 15.6 nM. The inhibiting action was evident only when the antibiotic was present during the initial phase of intracellular multiplication, i.e., during the formation of the phagosome, whereas the addition of the drug did not affect microorganisms already actively multiplying within the phagosome.
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Affiliation(s)
- L Cattani
- Istituto di Microbiologia, Facoltà di Medicina e Chirurgia, Università La Sapienza, Rome, Italy
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25
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Goldoni P, Castellani Pastoris M, Cattani L, Peluso C, Sinibaldi L, Orsi N. Effect of monensin on the invasiveness and multiplication of Legionella pneumophila. J Med Microbiol 1995; 42:269-75. [PMID: 7707335 DOI: 10.1099/00222615-42-4-269] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The polyether antibiotic monensin exhibited bacteriostatic activity against a clinical isolate of Legionella pneumophila in vitro. Experiments designed to test the effect of the compound on the invasiveness and multiplication of L. pneumophila in HeLa cells showed that, in the presence of the antibiotic, legionellas that penetrated the cells did not multiply. However, monensin did not alter the characteristics of phagosomes that contained ingested legionellas. In the presence of monensin, infected cells exhibited extensive vacuolation and a noticeable reduction in the number of intracellular micro-organisms was evident a few hours after infection.
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Affiliation(s)
- P Goldoni
- Istituto di Microbiologia, Università La Sapienza, Rome, Italy
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26
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Goldoni P, Cattani L, Sinibaldi L, Orsi N. Effect of various detergents on the interaction between BK virus and susceptible cells. New Microbiol 1994; 17:187-93. [PMID: 7968653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The activity of various types of detergents towards the infectivity and the hemagglutinating activity of BK virus was studied. Similarly to other non enveloped small viruses, BK virus showed a significant resistance to non cytotoxic concentrations of the compounds tested, with the exception of N-Dodecyl-N,N-dimethyl-3-ammonio-1-propane-sulfonate. In some cases, mainly with N-Octylglucoside, both the infectivity and the hemagglutinating activity of BK virus was enhanced.
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Affiliation(s)
- P Goldoni
- Istituto Pasteur, Fondazione Cenci Bolognetti, Università di Roma La Sapienza, Italy
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Goldoni P, Castellani Pastoris M, Cattani L, Sinibaldi L, Orsi N. Effect of sub-inhibitory concentrations of antibiotics on the hemolytic activity of Legionella. J Chemother 1993; 5:293-6. [PMID: 8106901 DOI: 10.1080/1120009x.1993.11739247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The effect of sub-inhibitory concentrations of various antibiotics on the hemolytic activity of different strains of Legionella has been tested. By means of a gradient plate technique it was possible to demonstrate that in a limited range of sub-inhibitory concentrations, antibiotics did not affect bacterial growth but inhibited the hemolytic activity of the strains examined.
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Affiliation(s)
- P Goldoni
- Istituto di Microbiologia, Università di Roma La Sapienza, Italy
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28
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Sinibaldi L, Goldoni P, Pietropaolo V, Cattani L, Peluso C, Di Taranto C. Role of phospholipids in BK virus infection and haemagglutination. Microbiologica 1992; 15:337-44. [PMID: 1331714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The role of phospholipids in BK virus infection and haemagglutination was studied by competition binding experiments and by treatment of susceptible cells with phospholipases. Phospholipids extracted from Vero cells and some commercial phospholipids showed an inhibiting activity on both BK virus infectivity and haemagglutination. The treatment of Vero cells with phospholipases affected the binding of BK virus, but the addition of phospholipids to enzyme-treated cells restored their susceptibility to both viral infectivity and haemagglutination.
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Affiliation(s)
- L Sinibaldi
- Istituto Pasteur, Fondazione Cenci Bolognetti, Roma, Italy
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29
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Abstract
The effect of several biological and synthetic polymers, chosen on the basis of different physical and chemical properties, was investigated on BK virus infectivity and hemagglutination. It was observed that polyanions like mucin, dextran sulfate and heparin depressed the viral binding, whereas polycations had no significant activity, with the exception of poly-L-lysine, which enhanced it. The effect of the active polymers was studied in different experimental conditions and the results obtained suggested that polyanions may act directly on the virus particle, whereas the target of polycations could be at the level of cell membranes. However, the effect shown by the active compounds did not appear to be simply related to the electric charge since neutral compounds, such as tamarind gum and locust bean gum, showed a marked inhibitory effect on BK virus binding to the cells.
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Affiliation(s)
- L Sinibaldi
- Istituto Pasteur, Fondazione Cenci Bolognetti, Rome, Italy
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30
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Abstract
The growth inhibiting activity of transferrins, citrate, 2-2' dipyridyl and desferrioxamine methanesulphonate towards Legionella spp. and their serogroups was investigated. The inhibitory activity of all these compounds depended upon the iron-free state of the molecules and was abolished by saturation with iron. No bactericidal effect by transferrins was observed at concentrations up to four times the minimal bacteriostatic concentration. No interaction of transferrins with the legionella cell surface was detected by direct or indirect fluorescence assay, or by dialysis culture experiments in which transferrin was separated from the bacterial cells. The demonstration of a siderophore-like activity in supernates of iron-deficient legionella cultures may account for the ability of Legionella spp. to multiply in conditions of iron restriction.
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Affiliation(s)
- P Goldoni
- Laboratorio di Batteriologia e Micologia Medica, Instituto Superiore di Sanita, Roma, Italy
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Sinibaldi L, Cavallo G, Goldoni P, Pietropaolo V, Viti D, Orsi N. Extraction and purification of gangliosides from CER cells, a cell line suitable for rabies virus replication. Microbiologica 1990; 13:339-42. [PMID: 2087202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Results are reported concerning the extraction and purification of gangliosides present in CER cells, a cell line which is highly suitable for the cultivation in vitro of rabies virus. By means of thin layer chromatography it has been possible to demonstrate that the CER cell ganglioside pattern is composed mainly of monosialo and disialogangliosides.
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Affiliation(s)
- L Sinibaldi
- Institute of Microbiology, University La Sapienza, Rome, Italy
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Abstract
BK virus infectivity was inhibited by gangliosides extracted from Vero cells and by standard preparations of different gangliosides. Gangliosides were also able to restore the susceptibility of glycosidase-treated Vero cells to BK virus infection.
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Affiliation(s)
- L Sinibaldi
- Istituto di Microbiologia, Facoltà di Medicina e Chirurgia, Università di Roma La Sapienza, Italy
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33
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Abstract
The Oxford panel of monoclonal antibodies was used to subtype 83 strains of Legionella pneumophila serogroup 1 of human and environmental origin. The International panel was also used to subtype 50 of them. All the 18 patients' isolates were of the Pontiac subgroup, and 40/43 of the environmental strains of the Pontiac subgroup were associated with human infection. The remaining environmental strains were subgroups Olda (15 strains), Camperdown (5 strains), and Bellingham (2 strains). The Philadelphia subgroup was the commonest among the environmental strains tested with the international MABs panel. This study confirms previous findings that L. pneumophila serogroup 1 isolates with the Pontiac (Oxford panel) or MAB-2 (international panel) reacting antigen marker seem to be more virulent than the other subgroups.
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Mastromarino P, Conti C, Goldoni P, Hauttecoeur B, Orsi N. Characterization of membrane components of the erythrocyte involved in vesicular stomatitis virus attachment and fusion at acidic pH. J Gen Virol 1987; 68 ( Pt 9):2359-69. [PMID: 2821175 DOI: 10.1099/0022-1317-68-9-2359] [Citation(s) in RCA: 106] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Goose erythrocyte membranes were isolated and tested for their ability to compete with red cell receptors for vesicular stomatitis virus (VSV) attachment and fusion at acidic pH. Crude membranes, solubilized with Triton X-100, Tween 80 and octyl-beta-D-glucopyranoside, showed a dose-dependent inhibitory effect on virus binding and haemolysis. The chemical nature of the active molecules was investigated by enzyme digestion and by separation of purified components. Only the lipid moiety, specifically phospholipid and glycolipid, was found to inhibit VSV attachment; a more detailed analysis of these molecules showed that phosphatidylinositol, phosphatidylserine and GM3 ganglioside were responsible for the inhibitory activity and could therefore represent VSV binding sites on goose erythrocyte membranes. Removal of negatively charged groups from these molecules by enzymic treatment significantly reduced their activity, suggesting that electrostatic interactions play an important role in the binding of VSV to the cell surface. Enzymic digestion of whole erythrocytes confirmed the involvement of membrane lipid molecules in the cell surface receptor for VSV.
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Affiliation(s)
- P Mastromarino
- Istituto di Microbiologia, Facoltà di Medicina, Università La Sapienza, Roma, Italy
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35
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Abstract
The effect of gangliosides extracted from human group O Rh+ erythrocytes on haemagglutination by BK virus was investigated. Experiments were performed on both ganglioside mixtures and isolated fractions separated by column chromatography and characterized by thin-layer chromatography. These results were compared with those obtained with standard preparations of gangliosides, and the inhibiting activity was shown to be confined mainly to gangliosides with a RF lower than GM1. It was also observed that the insertion of gangliosides in liposomes increased the haemagglutination-inhibiting activity and that ganglioside coating restored the ability of glycosidase-treated human red blood cells to agglutinate.
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Abstract
The role of gangliosides in rabies virus infection of chick embryo-related (CER) cells was investigated. Cultured cells were pretreated with neuraminidase to render the cells transiently non-susceptible to viral infection. Incubation of these desialylated cells with gangliosides allowed them to incorporate exogenous gangliosides and they recovered their susceptibility to rabies virus infection. Infection of CER cells was monitored by specific fluorescence 24 h after virus inoculation. The use of individual purified gangliosides or mixtures of two gangliosides to restore cellular susceptibility to viral infection showed that GT1b and GQ1b were the most effective. The disialogangliosides were also active, principally GD1b, whereas GM1, GM3 were poorly active and GD3 inactive. Incubation of rabies virus with gangliosides prior to virus infection reduced the percentage of infected cells. The results indicate that highly sialylated gangliosides are part of the cellular membrane receptor structure for the attachment of infective rabies virus. However, it is possible that other glycoconjugates such as glycoproteins or glycolipids also participate as components of a receptor structure for rabies virus.
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Sinibaldi L, Goldoni P, Seganti L, Superti F, Tsiang H, Orsi N. Gangliosides in early interactions between vesicular stomatitis virus and CER cells. Microbiologica 1985; 8:355-65. [PMID: 2999565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
In the present report an attempt was made to elucidate the role of gangliosides in early interactions between vesicular stomatitis virus (VSV) and CER cells. Research was carried out to test the ability of gangliosides from mammal brains and from CER cells to inhibit viral attachment to susceptible cells. The incubation of VSV in the presence of gangliosides decreased the subsequent infection of CER cells by the virus. When similar experiments were performed with gangliosides inserted in liposomes the inhibition of infection was enhanced. Since carbohydrate moieties could participate to rhabdovirus binding as a part of a glycolipid receptor, CER cells were subjected to the action of glycosidases and these produced a fall in the viral attachment. Deglycosilated CER cells reacquired their susceptibility to virus infection after coating with gangliosides immediately after enzyme treatment. Results obtained show the participation of gangliosides in the receptorial structure for vesiculovirus of susceptible CER cells.
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