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Nemoto D, Kikuchi N, Hitomi S. Periprosthetic knee joint infection caused by Sneathia sanguinegens. J Infect Chemother 2022; 28:1165-1167. [DOI: 10.1016/j.jiac.2022.03.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 03/12/2022] [Accepted: 03/21/2022] [Indexed: 11/16/2022]
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2
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Theis KR, Florova V, Romero R, Borisov AB, Winters AD, Galaz J, Gomez-Lopez N. Sneathia: an emerging pathogen in female reproductive disease and adverse perinatal outcomes. Crit Rev Microbiol 2021; 47:517-542. [PMID: 33823747 DOI: 10.1080/1040841x.2021.1905606] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Sneathia is an emerging pathogen implicated in adverse reproductive and perinatal outcomes. Although scarce, recent data suggest that vaginally residing Sneathia becomes pathogenic following its ascension into the upper urogenital tract, amniotic fluid, placenta, and foetal membranes. The role of Sneathia in women's health and disease is generally underappreciated because the cultivation of these bacteria is limited by their complex nutritional requirements, slow growth patterns, and anaerobic nature. For this reason, molecular methods are typically required for the detection and differential diagnosis of Sneathia infections. Here, we review the laboratory methods used for the diagnosis of Sneathia infections, the molecular mechanisms underlying its virulence, and its sensitivity to antibiotics. We further review the evidence of Sneathia's contributions to the pathogenesis of bacterial vaginosis, chorioamnionitis, preterm prelabour rupture of membranes, spontaneous preterm labour, stillbirth, maternal and neonatal sepsis, HIV infection, and cervical cancer. Collectively, growing evidence indicates that Sneathia represents an important yet underappreciated pathogen affecting the development and progression of several adverse clinical conditions diagnosed in pregnant women and their neonates, as well as in non-pregnant women.
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Affiliation(s)
- Kevin R Theis
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Detroit, MI, USA.,Department of Biochemistry, Microbiology, and Immunology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Violetta Florova
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Detroit, MI, USA.,Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Roberto Romero
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Detroit, MI, USA.,Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, USA.,Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI, USA.,Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI, USA.,Detroit Medical Center, Detroit, MI, USA.,Department of Obstetrics and Gynecology, Florida International University, Miami, FL, USA
| | - Andrei B Borisov
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Detroit, MI, USA.,Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Andrew D Winters
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Detroit, MI, USA.,Department of Biochemistry, Microbiology, and Immunology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Jose Galaz
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Detroit, MI, USA.,Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Nardhy Gomez-Lopez
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Detroit, MI, USA.,Department of Biochemistry, Microbiology, and Immunology, Wayne State University School of Medicine, Detroit, MI, USA.,Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, USA
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3
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Gómez Torrijos C, de la Morena Barrio I, Yagüe Muñoz A, Gimeno Cardona C. Septic Arthritis due to Sneathia Sanguinegens in a Male. First Case Described in the Scientific Literature. REUMATOLOGIA CLINICA 2021; 17:237-238. [PMID: 32376387 DOI: 10.1016/j.reuma.2020.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/20/2020] [Accepted: 02/25/2020] [Indexed: 06/11/2023]
Abstract
An 88-year-old male admitted with septic shoulder arthritis due to a gram-negative bacillus. The microorganism is identified by sequencing the 16 S rDNA gene as Sneathia sanguinegens. This is the first case described in the literature in a male, since so far only infections in women of childbearing age have been described.
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Affiliation(s)
- Cristian Gómez Torrijos
- Servicio de Medicina Interna, Hospital Universitario de la Plana, Vila-real, Castellón, España.
| | | | - Alberto Yagüe Muñoz
- Servicio de Microbiología, Hospital Universitario de la Plana, Vila-real, Castellón, España
| | - Concepción Gimeno Cardona
- Servicio de Microbiología, Hospital Universitario General de Valencia, Valencia, España; Departamento de Microbiología y Ecología, Universidad de Valencia, Burjassot, Valencia, España
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4
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Eisenberg T, Gronow S, Falgenhauer J, Imirzalioglu C, Mühldorfer K, Rau J, Blom J, Fawzy A, Glaeser SP, Kämpfer P. Sneathia vaginalis sp. nov. ( Fusobacteriales, Leptotrichiaceae) as a replacement of the species ' Sneathia amnii' Harwich et al. 2012 and ' Leptotrichia amnionii' Shukla et al. 2002, and emended description of Sneathia Collins et al. 2001. Int J Syst Evol Microbiol 2021; 71. [PMID: 33616512 DOI: 10.1099/ijsem.0.004663] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Members of the genus Sneathia are fastidious bacteria that predominantly colonise the female genital tract and are significantly associated with reproductive disorders and genital and neonatal disease. From a taxonomical perspective, the genus only comprises the species Sneathia sanguinegens. Numerous reports on a second species, 'Sneathia amnii', have been published, but the name has never been validated. The same is the case for 'Leptotrichia amnionii', which was previously shown to belong to the same species as 'Sneathia amnii'. We studied strains DSM 16631T and DSM 16630, which have been identified and deposited as 'Leptotrichia amnionii' previously. At the time of isolation, these strains were found to be most closely related to, but clearly different from, Sneathia sanguinegens based on 16S rRNA gene sequence similarities. Both strains proved to be almost indistinguishable from 'Sneathia amnii' based on molecular, morphological and physiological traits. The 16S rRNA gene sequence analysis revealed that strain DSM 16631T was assigned to the genus Sneathia with a sequence similarity of 95.47 % to Sneathia sanguinegens CCUG 41628T, followed by type strains of Caviibacter abscessus (93.03 %), Oceanivirga salmonicida (92.68 %) and Oceanivirga miroungae (91.97 %) as the next closely related members of the Leptotrichiaceae. The novel species was also clearly differentiated from other related taxa by core genome phylogeny, average nucleotide and amino acid identities, in silico DNA-DNA hybridization and MALDI-TOF MS. With respect to chemotaxonomic and physiological patterns, strains DSM 16631T and DSM 16630 were again highly similar to Sneathia sanguinegens. On the basis of these data, we propose the novel species Sneathia vaginalis sp. nov. with the type strain DSM 16631T (=CCUG 52977T=CCUG 52889AT) and a second strain DSM 16630 (=CCUG 52976=CCUG 52888) that were both isolated from bloodstream infections in women with puerperal fever in France. The G+C content of the DNA of the type strain is 28.4 mol% and the genome size is 1.28 Mbp. Based on the observed extremely high similarities of genotypic and phenotypic traits of the novel proposed species to those reported for 'Sneathia amnii', we recommend using this new name in all further publications on this taxon.
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Affiliation(s)
- Tobias Eisenberg
- Institute of Hygiene and Infectious Diseases of Animals, Justus-Liebig-University Giessen, 35392 Giessen, Germany.,Hessian State Laboratory (LHL), 35392 Giessen, Germany
| | - Sabine Gronow
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Culture GmbH, 38124 Braunschweig, Germany
| | - Jane Falgenhauer
- Institute for Medical Microbiology, Justus Liebig University Giessen, 35392 Giessen, Germany and German Center of Infection Research (DZIF), Partner site Giessen-Marburg-Langen, Germany
| | - Can Imirzalioglu
- Institute for Medical Microbiology, Justus Liebig University Giessen, 35392 Giessen, Germany and German Center of Infection Research (DZIF), Partner site Giessen-Marburg-Langen, Germany
| | - Kristin Mühldorfer
- Department of Wildlife Diseases, Leibniz Institute for Zoo and Wildlife Research, 10315 Berlin, Germany
| | - Jörg Rau
- Chemical and Veterinary Analysis Agency Stuttgart, 70736 Fellbach, Germany
| | - Jochen Blom
- Bioinformatics and Systems Biology, Justus-Liebig-University Giessen, 35392 Giessen, Germany
| | - Ahmad Fawzy
- Cairo University, Faculty of Veterinary Medicine, Department of Medicine and Infectious Diseases, Giza Square 12211, Egypt.,Hessian State Laboratory (LHL), 35392 Giessen, Germany
| | - Stefanie P Glaeser
- Institute of Applied Microbiology, Justus-Liebig-University Giessen, 35392 Giessen, Germany
| | - Peter Kämpfer
- Institute of Applied Microbiology, Justus-Liebig-University Giessen, 35392 Giessen, Germany
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5
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Identification of a Cytopathogenic Toxin from Sneathia amnii. J Bacteriol 2020; 202:JB.00162-20. [PMID: 32291280 DOI: 10.1128/jb.00162-20] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 04/04/2020] [Indexed: 12/22/2022] Open
Abstract
Sneathia amnii is a poorly characterized emerging pathogen that has been implicated in amnionitis and urethritis. We found that S. amnii damages fetal membranes, and we identified and purified a cytotoxic exotoxin that lyses human red blood cells and damages cells from fetal membranes. The gene appears to be cotranscribed with a second gene that encodes a protein with identity to two-partner system transporters, suggesting that it is the "A," or secreted component of a type Vb system. The toxin is 1,881 amino acids with a molecular weight of approximately 200 kDa. It binds to red blood cell membranes and forms pores with a diameter of 2.0 to 3.0 nm, resulting in osmolysis. Because it appears to be the "A" or passenger component of a two-partner system, we propose to name this novel cytotoxin/hemolysin CptA for cytopathogenic toxin component A.IMPORTANCE Sneathia amnii is a very poorly characterized emerging pathogen that can affect pregnancy outcome and cause urethritis and other infections. To date, nothing is known about its virulence factors or pathogenesis. We have identified and isolated a cytotoxin, named CptA for cytopathogenic toxin, component A, that is produced by S. amnii CptA is capable of permeabilizing chorionic trophoblasts and lysing human red blood cells and, thus, may play a role in virulence. Except for small domains conserved among two-partner secretion system passenger proteins, the cytotoxin exhibits little amino acid sequence homology to known toxins. In this study, we demonstrate the pore-forming activity of this novel toxin.
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6
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Kotaskova I, Nemec P, Vanerkova M, Malisova B, Tejkalova R, Orban M, Zampachova V, Freiberger T. First report of Sneathia sanguinegens together with Mycoplasma hominis in postpartum prosthetic valve infective endocarditis: a case report. BMC Infect Dis 2017; 17:563. [PMID: 28806998 PMCID: PMC5557263 DOI: 10.1186/s12879-017-2654-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 07/30/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The presence of more than one bacterial agent is relatively rare in infective endocarditis, although more common in prosthetic cases. Molecular diagnosis from a removed heart tissue is considered a quick and effective way to diagnose fastidious or intracellular agents. CASE PRESENTATION Here we describe the case of postpartum polymicrobial prosthetic valve endocarditis in a young woman. Sneathia sanguinegens and Mycoplasma hominis were simultaneously detected from the heart valve sample using broad range 16S rRNA polymerase chain reaction (PCR) followed by sequencing while culture remained negative. Results were confirmed by independent PCR combined with denaturing gradient gel electrophoresis. Before the final agent identification, the highly non-compliant patient left from the hospital against medical advice on empirical intravenous treatment with aminopenicillins, clavulanate and gentamicin switched to oral amoxycillin and clavulanate. Four months after surgery, no signs of inflammation were present despite new regurgitation and valve leaflet flail was detected. However, after another 5 months the patient died from sepsis and recurrent infective endocarditis of unclarified etiology. CONCLUSIONS Mycoplasma hominis is a rare causative agent of infective endocarditis. To the best of our knowledge, presented case is the first report of Sneathia sanguinegens detected in this condition. Molecular techniques were shown to be useful even in polymicrobial infective endocarditis samples.
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Affiliation(s)
- Iva Kotaskova
- Molecular and Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic.,Medical Genomics Research Group, CEITEC, Masaryk University, Brno, Czech Republic
| | - Petr Nemec
- Department of Cardiosurgery, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Martina Vanerkova
- Molecular and Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Barbora Malisova
- Molecular and Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Renata Tejkalova
- Department of Microbiology, Faculty of Medicine, Masaryk University and St. Anne's University Hospital, Brno, Czech Republic
| | - Marek Orban
- Department of Cardiology, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Vita Zampachova
- 1st Institute of Pathological Anatomy, Faculty of Medicine, Masaryk University and St. Anne's University Hospital, Brno, Czech Republic
| | - Tomas Freiberger
- Molecular and Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic. .,Medical Genomics Research Group, CEITEC, Masaryk University, Brno, Czech Republic. .,Department of Clinical Immunology and Allergology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
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7
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Oultram JWH, Ganda EK, Boulding SC, Bicalho RC, Oikonomou G. A Metataxonomic Approach Could Be Considered for Cattle Clinical Mastitis Diagnostics. Front Vet Sci 2017; 4:36. [PMID: 28344976 PMCID: PMC5344926 DOI: 10.3389/fvets.2017.00036] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 02/24/2017] [Indexed: 12/19/2022] Open
Abstract
Mastitis is one of the most costly diseases affecting the dairy industry, and identification of the causative microorganism(s) is essential. Here, we report the use of next-generation sequencing of bacterial 16S rRNA genes for clinical mastitis diagnosis. We used 65 paired milk samples, collected from the mastitic and a contralateral healthy quarter of mastitic dairy cattle to evaluate the technique as a potential alternative to bacterial culture or targeted PCR. One large commercial dairy farm was used, with one trained veterinarian collecting the milk samples. The 16S rRNA genes were individually amplified and sequenced using the MiSeq platform. The MiSeq Reporter was used in order to analyze the obtained sequences. Cattle were categorized according to whether or not 1 of the 10 most abundant bacterial genera in the mastitic quarter exhibited an increase in relative abundance between the healthy and mastitic quarters equal to, or exceeding, twofold. We suggest that this increase in relative abundance is indicative of the genus being a causative mastitis pathogen. Well-known mastitis-causing pathogens such as Streptococcus uberis and Staphylococcus spp. were identified in most cattle. We were able to diagnose 53 out of the 65 studied cases and identify potential new mastitis pathogens such as Sneathia sanguinegens and Listeria innocua, which are difficult to identify by bacterial culture because of their fastidious nature.
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Affiliation(s)
- Joanne W H Oultram
- Department of Livestock Health and Welfare, Institute of Veterinary Science, University of Liverpool , Neston , UK
| | - Erika K Ganda
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University , Ithaca, NY , USA
| | - Sarah C Boulding
- Department of Livestock Health and Welfare, Institute of Veterinary Science, University of Liverpool , Neston , UK
| | - Rodrigo C Bicalho
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University , Ithaca, NY , USA
| | - Georgios Oikonomou
- Department of Livestock Health and Welfare, Institute of Veterinary Science, University of Liverpool, Neston, UK; Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA; Department of Epidemiology and Population Health, Institute of Infection and Global Health, University of Liverpool, Neston, UK
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8
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Eisenberg T, Glaeser SP, Ewers C, Semmler T, Drescher B, Kämpfer P. Caviibacter abscessus gen. nov., sp. nov., a member of the family Leptotrichiaceae isolated from guinea pigs (Cavia porcellus). Int J Syst Evol Microbiol 2016; 66:1652-1659. [DOI: 10.1099/ijsem.0.000922] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
| | - Stefanie P. Glaeser
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
| | - Christa Ewers
- Institut für Hygiene und Infektionskrankheiten der Tiere, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
| | | | | | - Peter Kämpfer
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany
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Flandrois JP, Perrière G, Gouy M. leBIBIQBPP: a set of databases and a webtool for automatic phylogenetic analysis of prokaryotic sequences. BMC Bioinformatics 2015; 16:251. [PMID: 26264559 PMCID: PMC4531848 DOI: 10.1186/s12859-015-0692-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 07/31/2015] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Estimating the phylogenetic position of bacterial and archaeal organisms by genetic sequence comparisons is considered as the gold-standard in taxonomy. This is also a way to identify the species of origin of the sequence. The quality of the reference database used in such analyses is crucial: the database must reflect the up-to-date bacterial nomenclature and accurately indicate the species of origin of its sequences. DESCRIPTION leBIBI(QBPP) is a web tool taking as input a series of nucleotide sequences belonging to one of a set of reference markers (e.g., SSU rRNA, rpoB, groEL2) and automatically retrieving closely related sequences, aligning them, and performing phylogenetic reconstruction using an approximate maximum likelihood approach. The system returns a set of quality parameters and, if possible, a suggested taxonomic assigment for the input sequences. The reference databases are extracted from GenBank and present four degrees of stringency, from the "superstringent" degree (one type strain per species) to the loosely parsed degree ("lax" database). A set of one hundred to more than a thousand sequences may be analyzed at a time. The speed of the process has been optimized through careful hardware selection and database design. CONCLUSION leBIBI(QBPP) is a powerful tool helping biologists to position bacterial or archaeal sequence commonly used markers in a phylogeny. It is a diagnostic tool for clinical, industrial and environmental microbiology laboratory, as well as an exploratory tool for more specialized laboratories. Its main advantages, relatively to comparable systems are: i) the use of a broad set of databases covering diverse markers with various degrees of stringency; ii) the use of an approximate Maximum Likelihood approach for phylogenetic reconstruction; iii) a speed compatible with on-line usage; and iv) providing fully documented results to help the user in decision making.
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Affiliation(s)
- Jean-Pierre Flandrois
- Laboratoire de Biométrie et Biologie Evolutive, UMR CNRS 5558, Université Claude Bernard - Lyon 1, 43 bd. du 11 Novembre 1918, Villeurbanne, 69622, France.
| | - Guy Perrière
- Laboratoire de Biométrie et Biologie Evolutive, UMR CNRS 5558, Université Claude Bernard - Lyon 1, 43 bd. du 11 Novembre 1918, Villeurbanne, 69622, France.
| | - Manolo Gouy
- Laboratoire de Biométrie et Biologie Evolutive, UMR CNRS 5558, Université Claude Bernard - Lyon 1, 43 bd. du 11 Novembre 1918, Villeurbanne, 69622, France.
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10
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Devi U, Bora R, Das JK, Malik V, Mahanta J. Sneathia species in a case of neonatal meningitis from Northeast India. Oxf Med Case Reports 2014; 2014:112-4. [PMID: 25988049 PMCID: PMC4369986 DOI: 10.1093/omcr/omu044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 08/15/2014] [Accepted: 08/21/2014] [Indexed: 12/02/2022] Open
Abstract
Here we report the detection of Sneathia species most closely related to Sneathia sanguinegens, an infrequently reported bacterium, in the cerebrospinal fluid of a neonate by a culture independent method. Even though on rare occasions, this bacterium was isolated previously from the blood of neonatal bacteraemia cases. To the best of our knowledge there exists no previous report of detection of S. sanguinegens in the cerebrospinal fluid even though recently there has been a report of isolation of closely related species, Leptotrichia amnionii. The neonate recovered following antimicrobial therapy for 21 days. We conclude that uncultivable or difficult- to-cultivate bacteria like Sneathia could be an emerging pathogen for neonatal infection.
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Affiliation(s)
- Utpala Devi
- Regional Medical Research Centre , North East Region (ICMR) , Dibrugarh , India
| | - Reeta Bora
- Neonatology Unit , Assam Medical College & Hospital , Dibrugarh , India
| | - Jayanta Kumar Das
- Department of Microbiology , Assam Medical College & Hospital , Dibrugarh , India
| | - Vinita Malik
- Regional Medical Research Centre , North East Region (ICMR) , Dibrugarh , India
| | - Jagadish Mahanta
- Regional Medical Research Centre , North East Region (ICMR) , Dibrugarh , India
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11
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Harwich MD, Serrano MG, Fettweis JM, Alves JMP, Reimers MA, Buck GA, Jefferson KK. Genomic sequence analysis and characterization of Sneathia amnii sp. nov. BMC Genomics 2012; 13 Suppl 8:S4. [PMID: 23281612 PMCID: PMC3535699 DOI: 10.1186/1471-2164-13-s8-s4] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Bacteria of the genus Sneathia are emerging as potential pathogens of the female reproductive tract. Species of Sneathia, which were formerly grouped with Leptotrichia, can be part of the normal microbiota of the genitourinary tracts of men and women, but they are also associated with a variety of clinical conditions including bacterial vaginosis, preeclampsia, preterm labor, spontaneous abortion, post-partum bacteremia and other invasive infections. Sneathia species also exhibit a significant correlation with sexually transmitted diseases and cervical cancer. Because Sneathia species are fastidious and rarely cultured successfully in vitro; and the genomes of members of the genus had until now not been characterized, very little is known about the physiology or the virulence of these organisms. RESULTS Here, we describe a novel species, Sneathia amnii sp. nov, which closely resembles bacteria previously designated "Leptotrichia amnionii". As part of the Vaginal Human Microbiome Project at VCU, a vaginal isolate of S. amnii sp. nov. was identified, successfully cultured and bacteriologically cloned. The biochemical characteristics and virulence properties of the organism were examined in vitro, and the genome of the organism was sequenced, annotated and analyzed. The analysis revealed a reduced circular genome of ~1.34 Mbp, containing ~1,282 protein-coding genes. Metabolic reconstruction of the bacterium reflected its biochemical phenotype, and several genes potentially associated with pathogenicity were identified. CONCLUSIONS Bacteria with complex growth requirements frequently remain poorly characterized and, as a consequence, their roles in health and disease are unclear. Elucidation of the physiology and identification of genes putatively involved in the metabolism and virulence of S. amnii may lead to a better understanding of the role of this potential pathogen in bacterial vaginosis, preterm birth, and other issues associated with vaginal and reproductive health.
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Affiliation(s)
- Michael D Harwich
- Department of Microbiology and Immunology, Virginia Commonwealth University School of Medicine, 1101 E. Marshall Street - PO Box 980678, Richmond, VA 23298-0678, USA
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