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Joyce M, Laing A, Mullet H, Gilmore MF, Cormican M. Isolated Septic Arthritis: Meningococcal Infection. J R Soc Med 2017. [DOI: 10.1177/014107680309600511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- M Joyce
- Department of Orthopaedics, University College Hospital, Galway, Ireland
| | - A Laing
- Department of Orthopaedics, University College Hospital, Galway, Ireland
| | - H Mullet
- Department of Orthopaedics, University College Hospital, Galway, Ireland
| | - M F Gilmore
- Department of Orthopaedics, University College Hospital, Galway, Ireland
| | - M Cormican
- Department of Microbiology, University College Hospital, Galway, Ireland
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2
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Siena E, D’Aurizio R, Riley D, Tettelin H, Guidotti S, Torricelli G, Moxon ER, Medini D. In-silico prediction and deep-DNA sequencing validation indicate phase variation in 115 Neisseria meningitidis genes. BMC Genomics 2016; 17:843. [PMID: 27793092 PMCID: PMC5084427 DOI: 10.1186/s12864-016-3185-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 10/22/2016] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND The Neisseria meningitidis (Nm) chromosome shows a high abundance of simple sequence DNA repeats (SSRs) that undergo stochastic, reversible mutations at high frequency. This mechanism is reflected in an extensive phenotypic diversity that facilitates Nm adaptation to dynamic environmental changes. To date, phase-variable phenotypes mediated by SSRs variation have been experimentally confirmed for 26 Nm genes. RESULTS Here we present a population-scale comparative genomic analysis that identified 277 genes and classified them into 52 strong, 60 moderate and 165 weak candidates for phase variation. Deep-coverage DNA sequencing of single colonies grown overnight under non-selective conditions confirmed the presence of high-frequency, stochastic variation in 115 of them, providing circumstantial evidence for their phase variability. We confirmed previous observations of a predominance of variable SSRs within genes for components located on the cell surface or DNA metabolism. However, in addition we identified an unexpectedly broad spectrum of other metabolic functions, and most of the variable SSRs were predicted to induce phenotypic changes by modulating gene expression at a transcriptional level or by producing different protein isoforms rather than mediating on/off translational switching through frameshifts. Investigation of the evolutionary history of SSR contingency loci revealed that these loci were inherited from a Nm ancestor, evolved independently within Nm, or were acquired by Nm through lateral DNA exchange. CONCLUSIONS Overall, our results have identified a broader and qualitatively different phenotypic diversification of SSRs-mediated stochastic variation than previously documented, including its impact on central Nm metabolism.
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Affiliation(s)
| | - Romina D’Aurizio
- GSK Vaccines, 53100 Siena, Italy
- Present address: Institute of Informatics and Telematics and Institute of Clinical Physiology, National Research Council, 56124 Pisa, Italy
| | - David Riley
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD 21201 USA
- Present address: Personal Genome Disgnostics inc., Baltimore, MD 21224 USA
| | - Hervé Tettelin
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | | | | | - E. Richard Moxon
- Medical Sciences Division, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, OX3 9DS UK
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Nihonyanagi S, Sunakawa K, Cui L, Masaki T, Wada T, Hoshiyama T, Nakamura M, Takayama Y, Kanoh Y, Ogawa A, Shichiri M, Hanaki H. A very rare case of primary meningococcal arthritis in an adult male. Clin Case Rep 2014; 3:76-80. [PMID: 25767700 PMCID: PMC4352356 DOI: 10.1002/ccr3.151] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 08/05/2014] [Accepted: 08/24/2014] [Indexed: 11/25/2022] Open
Abstract
We report here a very rare case of primary meningococcal arthritis of the knee joint without clinical features associated with meningococcemia, meningitis, or meningococcal complications. The patient suffered from diabetes mellitus and had experienced two episodes of joint trauma. Intravenous infusion of ampicillin/sulbactam for 18 consecutive days was successful.
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Affiliation(s)
- Shin Nihonyanagi
- Department of Medical Laboratory, Kitasato University Hospital 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan ; Kitasato Institute for Life Sciences and Laboratory for Antimicrobial Agents, Kitasato University 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Keisuke Sunakawa
- Kitasato Institute for Life Sciences and Graduate School of Infection Control Sciences, Kitasato University 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Longzhu Cui
- Kitasato Institute for Life Sciences and Laboratory for Antimicrobial Agents, Kitasato University 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Tsuguto Masaki
- Department of Endocrinology and Metabolism, Kitasato University School of Medicine 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Tatsuhiko Wada
- Department of Rheumatology and Infectious Diseases, Kitasato University School of Medicine 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Takayuki Hoshiyama
- Department of Rheumatology and Infectious Diseases, Kitasato University School of Medicine 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Masaki Nakamura
- Kitasato Institute for Life Sciences and Laboratory for Antimicrobial Agents, Kitasato University 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan ; Department of Microbiology, Kitasato University School of Allied Health Sciences 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Yoko Takayama
- Department of Infection Control and Prevention, Kitasato University Hospital 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Yuhsaku Kanoh
- Department of Medical Laboratory, Kitasato University Hospital 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan ; Department of Laboratory Medicine, Kitasato University Hospital 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Akifumi Ogawa
- Department of Endocrinology and Metabolism, Kitasato University School of Medicine 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Masayoshi Shichiri
- Department of Endocrinology and Metabolism, Kitasato University School of Medicine 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
| | - Hideaki Hanaki
- Kitasato Institute for Life Sciences and Laboratory for Antimicrobial Agents, Kitasato University 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
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Kim SA, Kim DW, Dong BQ, Kim JS, Anh DD, Kilgore PE. An expanded age range for meningococcal meningitis: molecular diagnostic evidence from population-based surveillance in Asia. BMC Infect Dis 2012; 12:310. [PMID: 23164061 PMCID: PMC3519641 DOI: 10.1186/1471-2334-12-310] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 11/05/2012] [Indexed: 12/27/2022] Open
Abstract
Background To understand epidemiologic patterns of meningococcal disease in Asia, we performed a retrospective molecular analysis of cerebrospinal fluid (CSF) specimens collected in prospective surveillance among children aged < 5 years of age in China, South Korea, and Vietnam. Methods A total of 295 isolates and 2,302 CSFs were tested by a meningococcal species- and serogroup-specific polymerase chain reaction (PCR) assay targeting the Neisseria meningitidis (Nm) ctrA gene. Multi-locus sequence typing (MLST) was performed in Nm gene amplification analysis and incidence rates for meningococcal meningitis were estimated. Results Among 295 isolates tested, 10 specimens from Vietnam were confirmed as serogroup B and all were Sequence Type (ST) 1576 by MLST. Among the 2,032 CSF specimen tested, 284 (14%) were confirmed by PCR (ctrA gene), including 67 (23.6%) from China, 92 (32.4%) from Korea, and 125 (44.0%) from Vietnam. Neonates and infants aged < 6 months of age accounted for more than 50% of Nm-PCR positive CSF. Two CSF specimens from Vietnam were identified as serogroup B using MLST. In addition, 44 specimens underwent sequencing to confirm meningococcal serogroup; of these, 21 (48%) were serogroup C, 12 (27%) were serogroup X, 9 (20%) were serogroup Y and 2 (5%) were serogroup B. The incidence rates of meningococcal meningitis among children < 5 years of age was highest in Vietnam (7.4/100,000 [95% CI, 3.6—15.3] followed by Korea (6.8/100,000 [95% CI, 3.5-13.5] and China (2.1/100,000) [95% CI, 0.7-6.2]). Conclusions These results suggest that there is a previously undetected, yet substantial burden of meningococcal meningitis among infants and young children. Standardized, sensitive and specific molecular diagnostic assays with Nm serogrouping capacity are needed throughout Asia to understand the true burden of N. meningitidis disease.
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Affiliation(s)
- Soon Ae Kim
- Translational Research Division, International Vaccine Institute, SNU Research Park, San 4-8 Nakseongdae-Dong, Kwanak Gu, Seoul 151-919, South Korea.
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Fantappiè L, Oriente F, Muzzi A, Serruto D, Scarlato V, Delany I. A novel Hfq-dependent sRNA that is under FNR control and is synthesized in oxygen limitation in Neisseria meningitidis. Mol Microbiol 2011; 80:507-23. [DOI: 10.1111/j.1365-2958.2011.07592.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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