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Frost KM, Charron-Smith SL, Cotsonas TC, Dimartino DC, Eisenhart RC, Everingham ET, Holland EC, Imtiaz K, Kornowicz CJ, Lenhard LE, Lynch LH, Moore NP, Phadke K, Reed ML, Smith SR, Ward LL, Wadsworth CB. Rolling the evolutionary dice: Neisseria commensals as proxies for elucidating the underpinnings of antibiotic resistance mechanisms and evolution in human pathogens. Microbiol Spectr 2024; 12:e0350723. [PMID: 38179941 PMCID: PMC10871548 DOI: 10.1128/spectrum.03507-23] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 12/01/2023] [Indexed: 01/06/2024] Open
Abstract
Species within the genus Neisseria are adept at sharing adaptive allelic variation, with commensal species repeatedly transferring resistance to their pathogenic relative Neisseria gonorrhoeae. However, resistance in commensals is infrequently characterized, limiting our ability to predict novel and potentially transferable resistance mechanisms that ultimately may become important clinically. Unique evolutionary starting places of each Neisseria species will have distinct genomic backgrounds, which may ultimately control the fate of evolving populations in response to selection as epistatic and additive interactions coerce lineages along divergent evolutionary trajectories. Alternatively, similar genetic content present across species due to shared ancestry may constrain existing adaptive solutions. Thus, identifying the paths to resistance across commensals may aid in characterizing the Neisseria resistome-or the reservoir of alleles within the genus as well as its depth. Here, we use in vitro evolution of four commensal species to investigate the potential and repeatability of resistance evolution to two antimicrobials, the macrolide azithromycin and the β-lactam penicillin. After 20 days of selection, commensals evolved resistance to penicillin and azithromycin in 11/16 and 12/16 cases, respectively. Almost all cases of resistance emergence converged on mutations within ribosomal components or the mtrRCDE efflux pump for azithromycin-based selection and mtrRCDE, penA, and rpoB for penicillin selection, thus supporting constrained adaptive solutions despite divergent evolutionary starting points across the genus for these particular drugs. Though drug-selected loci were limited, we do identify novel resistance-imparting mutations. Continuing to explore paths to resistance across different experimental conditions and genomic backgrounds, which could shunt evolution down alternative evolutionary trajectories, will ultimately flesh out the full Neisseria resistome.IMPORTANCENeisseria gonorrhoeae is a global threat to public health due to its rapid acquisition of antibiotic resistance to all first-line treatments. Recent work has documented that alleles acquired from close commensal relatives have played a large role in the emergence of resistance to macrolides and beta-lactams within gonococcal populations. However, commensals have been relatively underexplored for the resistance genotypes they may harbor. This leaves a gap in our understanding of resistance that could be rapidly acquired by the gonococcus through a known highway of horizontal gene exchange. Here, we characterize resistance mechanisms that can emerge in commensal Neisseria populations via in vitro selection to multiple antimicrobials and begin to define the number of paths to resistance. This study, and other similar works, may ultimately aid both surveillance efforts and clinical diagnostic development by nominating novel and conserved resistance mechanisms that may be at risk of rapid dissemination to pathogen populations.
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Affiliation(s)
- Kelly M. Frost
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Sierra L. Charron-Smith
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Terence C. Cotsonas
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Daniel C. Dimartino
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Rachel C. Eisenhart
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Eric T. Everingham
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Elle C. Holland
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Kainat Imtiaz
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Cory J. Kornowicz
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Lydia E. Lenhard
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Liz H. Lynch
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Nadia P. Moore
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Kavya Phadke
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Makayla L. Reed
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Samantha R. Smith
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Liza L. Ward
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Crista B. Wadsworth
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
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Kenyon C. Commentary: Non-pathogenic Neisseria species of the oropharynx as a reservoir of antimicrobial resistance: a cross-sectional study. Front Cell Infect Microbiol 2024; 13:1343608. [PMID: 38264734 PMCID: PMC10803593 DOI: 10.3389/fcimb.2023.1343608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 12/20/2023] [Indexed: 01/25/2024] Open
Affiliation(s)
- Chris Kenyon
- Department of Clinical Sciences, Institute of Tropical Medicine Antwerp, Antwerp, Belgium
- Department of Medicine, University of Cape Town, Cape Town, South Africa
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Wang C, Niu D, Mchunu NP, Zhang M, Singh S, Wang Z. Secretory expression of amylosucrase in Bacillus licheniformis through twin-arginine translocation pathway. J Ind Microbiol Biotechnol 2024; 51:kuae004. [PMID: 38253396 PMCID: PMC10849164 DOI: 10.1093/jimb/kuae004] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 01/19/2024] [Indexed: 01/24/2024]
Abstract
Amylosucrase (EC 2.4.1.4) is a versatile enzyme with significant potential in biotechnology and food production. To facilitate its efficient preparation, a novel expression strategy was implemented in Bacillus licheniformis for the secretory expression of Neisseria polysaccharea amylosucrase (NpAS). The host strain B. licheniformis CBBD302 underwent genetic modification through the deletion of sacB, a gene responsible for encoding levansucrase that synthesizes extracellular levan from sucrose, resulting in a levan-deficient strain, B. licheniformis CBBD302B. Neisseria polysaccharea amylosucrase was successfully expressed in B. licheniformis CBBD302B using the highly efficient Sec-type signal peptide SamyL, but its extracellular translocation was unsuccessful. Consequently, the expression of NpAS via the twin-arginine translocation (TAT) pathway was investigated using the signal peptide SglmU. The study revealed that NpAS could be effectively translocated extracellularly through the TAT pathway, with the signal peptide SglmU facilitating the process. Remarkably, 62.81% of the total expressed activity was detected in the medium. This study marks the first successful secretory expression of NpAS in Bacillus species host cells, establishing a foundation for its future efficient production. ONE-SENTENCE SUMMARY Amylosucrase was secreted in Bacillus licheniformis via the twin-arginine translocation pathway.
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Affiliation(s)
- Caizhe Wang
- Department of Biological Chemical Engineering, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Dandan Niu
- Department of Biological Chemical Engineering, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Nokuthula Peace Mchunu
- National Research Foundation, PO Box 2600 Pretoria 0001, South Africa
- School of Life Science, University of KwaZulu Natal, Durban 4000, South Africa
| | - Meng Zhang
- Department of Biological Chemical Engineering, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Suren Singh
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, PO Box 1334, Durban 4001, South Africa
| | - Zhengxiang Wang
- Department of Biological Chemical Engineering, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
- Tianjin Key Laboratory of Industrial Microbiology, Tianjin 300457, China
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Duan B, Gan M, Xu Z, Chen WX. Tonsil microbiome in pediatric patients with post tonsillectomy hemorrhage for tonsillar hypertrophy. Int J Pediatr Otorhinolaryngol 2024; 176:111788. [PMID: 38039804 DOI: 10.1016/j.ijporl.2023.111788] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 09/20/2023] [Accepted: 11/12/2023] [Indexed: 12/03/2023]
Abstract
OBJECTIVE This study aimed to compare the tonsillar microbiota between post tonsillectomy patients with bleeding and without bleeding, and to investigate the potential role of tonsillar microbiota in the development of post-tonsillectomy hemorrhage (PTH). METHODS Nineteen tonsillar tissues from PTH patients and 21 tissues from control patients were collected. Metagenomic sequencing was used to compare the microbiota in PTH and control groups. Alpha diversity indices were used to compare the richness and evenness of the microbiota between the two groups. PCoA and NMDS analyses were used to evaluate beta diversity. LDA analysis was conducted to identify significantly abundant genera. RESULTS No significant difference in alpha diversity indices was found between PTH and control patients. The dominant bacteria in the tonsillar microbiota were Haemophilus, Streptococcus, and Fusobacterium. PCoA and NMDS analyses showed significant differences in beta diversity between PTH and control patients. PTH patients had a significantly higher relative abundance of Neisseria, Capnocytophaga, and Veillonella. Capnocytophaga was also identified as a significantly abundant genus by LDA analysis. CONCLUSION This study demonstrates that there is a difference in the tonsillar microbiota between PTH and control patients. The results suggest that Neisseria, Capnocytophaga, and Veillonella may be associated with the development of PTH. These findings provide new insights into the potential role of the tonsillar microbiota in the development of PTH, and may help to develop new strategies for preventing and treating this potentially life-threatening complication.
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Affiliation(s)
- Bo Duan
- Department of Otolaryngology-Head and Neck Surgery, Children's Hospital of Fudan University, 399 Wanyuan Road, Minhang District, Shanghai, 201102, China.
| | - Mingyu Gan
- Center for Molecular Medicine, Children's Hospital of Fudan University, National Children's Medical Center 399 Wanyuan Road, Minhang District, Shanghai, 201102, China.
| | - Zhengmin Xu
- Department of Otolaryngology-Head and Neck Surgery, Children's Hospital of Fudan University, 399 Wanyuan Road, Minhang District, Shanghai, 201102, China.
| | - Wen-Xia Chen
- Department of Otolaryngology-Head and Neck Surgery, Children's Hospital of Fudan University, 399 Wanyuan Road, Minhang District, Shanghai, 201102, China.
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Kulkarni A, Jozefiaková J, Bhide K, Mochnaćová E, Bhide M. Differential transcriptome response of blood brain barrier spheroids to neuroinvasive Neisseria and Borrelia. Front Cell Infect Microbiol 2023; 13:1326578. [PMID: 38179419 PMCID: PMC10766361 DOI: 10.3389/fcimb.2023.1326578] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 11/30/2023] [Indexed: 01/06/2024] Open
Abstract
Background The blood-brain barrier (BBB), a highly regulated interface between the blood and the brain, prevents blood-borne substances and pathogens from entering the CNS. Nevertheless, pathogens like Neisseria meningitidis and Borrelia bavariensis can breach the BBB and infect the brain parenchyma. The self-assembling BBB-spheroids can simulate the cross talk occurring between the cells of the barrier and neuroinvasive pathogens. Methods BBB spheroids were generated by co-culturing human brain microvascular endothelial cells (hBMECs), pericytes and astrocytes. The BBB attributes of spheroids were confirmed by mapping the localization of cells, observing permeability of angiopep2 and non-permeability of dextran. Fluorescent Neisseria, Borrelia or E. coli (non-neuroinvasive) were incubated with spheroids to observe the adherence, invasion and spheroid integrity. Transcriptome analysis with NGS was employed to investigate the response of BBB cells to infections. Results hBMECs were localized throughout the spheroids, whereas pericytes and astrocytes were concentrated around the core. Within 1 hr of exposure, Neisseria and Borrelia adhered to spheroids, and their microcolonization increased from 5 to 24 hrs. Integrity of spheroids was compromised by both Neisseria and Borrelia, but not by E. coli infection. Transcriptome analysis revealed a significant change in the expression of 781 genes (467 up and 314 down regulated) in spheroids infected with Neisseria, while Borrelia altered the expression of 621 genes (225 up and 396 down regulated). The differentially expressed genes could be clustered into various biological pathways like cell adhesion, extracellular matrix related, metallothionines, members of TGF beta, WNT signaling, and immune response. Among the differentially expressed genes, 455 (48%) genes were inversely expressed during Neisseria and Borrelia infection. Conclusion The self-assembling spheroids were used to perceive the BBB response to neuroinvasive pathogens - Neisseria and Borrelia. Compromised integrity of spheroids during Neisseria and Borrelia infection as opposed to its intactness and non-adherence of E. coli (non-neuroinvasive) denotes the pathogen dependent fate of BBB. Genes categorized into various biological functions indicated weakened barrier properties of BBB and heightened innate immune response. Inverse expression of 48% genes commonly identified during Neisseria and Borrelia infection exemplifies unique response of BBB to varying neuropathogens.
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Affiliation(s)
- Amod Kulkarni
- Laboratory of Biomedical Microbiology and Immunology, The University of Veterinary Medicine and Pharmacy, Kosice, Slovakia
- Institute of Neuroimmunology of Slovak Academy of Sciences, Bratislava, Slovakia
| | - Jana Jozefiaková
- Laboratory of Biomedical Microbiology and Immunology, The University of Veterinary Medicine and Pharmacy, Kosice, Slovakia
| | - Katarína Bhide
- Laboratory of Biomedical Microbiology and Immunology, The University of Veterinary Medicine and Pharmacy, Kosice, Slovakia
| | - Evelína Mochnaćová
- Laboratory of Biomedical Microbiology and Immunology, The University of Veterinary Medicine and Pharmacy, Kosice, Slovakia
| | - Mangesh Bhide
- Laboratory of Biomedical Microbiology and Immunology, The University of Veterinary Medicine and Pharmacy, Kosice, Slovakia
- Institute of Neuroimmunology of Slovak Academy of Sciences, Bratislava, Slovakia
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Walsh L, Clark SA, Derrick JP, Borrow R. Beyond the usual suspects: Reviewing infections caused by typically-commensal Neisseria species. J Infect 2023; 87:479-489. [PMID: 37797844 DOI: 10.1016/j.jinf.2023.09.007] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/27/2023] [Accepted: 09/22/2023] [Indexed: 10/07/2023]
Abstract
OBJECTIVE Few data outside of individual case reports are available on non-meningococcal, non-gonococcal species of Neisseria as causative agents of invasive disease. This review collates disease, organism and patient information from case reports on the topic. METHODS A literature search was performed examining articles describing diseases caused by non-meningococcal and non-gonococcal Neisseria. FINDINGS Neisseria present as opportunistic pathogens causing a wide variety of diseases including serious presentations, endocarditis being the most common condition described and N. mucosa the most commonly presenting pathogen overall. Disease may occur in otherwise healthy patients, although risk factors for infection include recent surgery, an immunocompromised state, poor oral health, and intravenous drug use. CONCLUSIONS Commensal Neisseria infections are rare but can present serious invasive diseases. Further research is required to determine why some species cause disease more than others or why some are inclined towards particular manifestations.
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Affiliation(s)
- Lloyd Walsh
- Meningococcal Reference Unit, UK Health Security Agency, Manchester M13 9WL, United Kingdom.
| | - Stephen A Clark
- Meningococcal Reference Unit, UK Health Security Agency, Manchester M13 9WL, United Kingdom
| | - Jeremy P Derrick
- School of Biological Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Ray Borrow
- Meningococcal Reference Unit, UK Health Security Agency, Manchester M13 9WL, United Kingdom
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Savitskaya VY, Dolinnaya NG, Strekalovskikh VV, Peskovatskova ES, Snyga VG, Trefilov VS, Monakhova MV, Kubareva EA. Bioinformatics Analysis of Global Diversity in Meningococcal Vaccine Antigens over the Past 10 Years: Vaccine Efficacy Prognosis. Med Sci (Basel) 2023; 11:76. [PMID: 38132917 PMCID: PMC10744425 DOI: 10.3390/medsci11040076] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 11/17/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023] Open
Abstract
Neisseria meningitidis (N. meningitidis) serogroup B (MenB) is the leading cause of invasive meningococcal disease worldwide. The pathogen has a wide range of virulence factors, which are potential vaccine components. Studying the genetic variability of antigens within a population, especially their long-term persistence, is necessary to develop new vaccines and predict the effectiveness of existing ones. The multicomponent 4CMenB vaccine (Bexsero), used since 2014, contains three major genome-derived recombinant proteins: factor H-binding protein (fHbp), Neisserial Heparin-Binding Antigen (NHBA) and Neisserial adhesin A (NadA). Here, we assessed the prevalence and sequence variations of these vaccine antigens in a panel of 5667 meningococcal isolates collected worldwide over the past 10 years and deposited in the PubMLST database. Using multiple amino acid sequence alignments and Random Forest Classifier machine learning methods, we estimated the potential strain coverage of fHbp and NHBA vaccine variants (51 and about 25%, respectively); the NadA antigen sequence was found in only 18% of MenB genomes analyzed, but cross-reactive variants were present in less than 1% of isolates. Based on our findings, we proposed various strategies to improve the 4CMenB vaccine and broaden the coverage of N. meningitidis strains.
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Affiliation(s)
- Viktoriia Yu. Savitskaya
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Nina G. Dolinnaya
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Vadim V. Strekalovskikh
- Department of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119234, Russia; (V.V.S.); (E.S.P.)
| | - Elizaveta S. Peskovatskova
- Department of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119234, Russia; (V.V.S.); (E.S.P.)
| | - Viktoriia G. Snyga
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Vadim S. Trefilov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Mayya V. Monakhova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119992, Russia
| | - Elena A. Kubareva
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119992, Russia
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Gaspari V, Djusse ME, Morselli S, Rapparini L, Foschi C, Ambretti S, Lazzarotto T, Piraccini BM, Marangoni A. Non-pathogenic Neisseria species of the oropharynx as a reservoir of antimicrobial resistance: a cross-sectional study. Front Cell Infect Microbiol 2023; 13:1308550. [PMID: 38076458 PMCID: PMC10703147 DOI: 10.3389/fcimb.2023.1308550] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 11/02/2023] [Indexed: 12/18/2023] Open
Abstract
Commensal Neisseria species of the oropharynx represent a significant reservoir of antimicrobial resistance determinants that can be transferred to Neisseria gonorrhoeae. This aspect is particularly crucial in 'men having sex with men' (MSM), a key population in which pharyngeal co-colonization by N. gonorrhoeae and non-pathogenic Neisseria species is frequent and associated with the emergence of antimicrobial resistance. Here, we explored the antimicrobial susceptibility of a large panel of non-pathogenic Neisseria species isolated from the oropharynx of two populations: a group of MSM attending a 'sexually transmitted infection' clinic in Bologna (Italy) (n=108) and a group of males representing a 'general population' (n=119). We collected 246 strains, mainly belonging to N. subflava (60%) and N. flavescens (28%) species. Their antimicrobial susceptibility was evaluated assessing the minimum inhibitory concentrations (MICs) for azithromycin, ciprofloxacin, cefotaxime, and ceftriaxone using E-test strips. Overall, commensal Neisseria spp. showed high rates of resistance to azithromycin (90%; median MICs: 4.0 mg/L), and ciprofloxacin (58%; median MICs: 0.12 mg/L), whereas resistance to cephalosporins was far less common (<15%). Neisseria strains from MSM were found to have significantly higher MICs for azithromycin (p=0.0001) and ciprofloxacin (p<0.0001) compared to those from the general population. However, there was no significant difference in cephalosporin MICs between the two groups. The surveillance of the antimicrobial resistance of non-pathogenic Neisseria spp. could be instrumental in predicting the risk of the spread of multi-drug resistant gonorrhea. This information could be an early predictor of an excessive use of antimicrobials, paving the way to innovative screening and prevention policies.
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Affiliation(s)
- Valeria Gaspari
- Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Marielle Ezekielle Djusse
- Section of Microbiology, Department of Medical and Surgical Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy
| | - Sara Morselli
- Section of Microbiology, Department of Medical and Surgical Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy
| | - Luca Rapparini
- Section of Dermatology, Department of Medical and Surgical Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy
| | - Claudio Foschi
- Section of Microbiology, Department of Medical and Surgical Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy
- Microbiology Unit, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Simone Ambretti
- Section of Microbiology, Department of Medical and Surgical Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy
- Microbiology Unit, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Tiziana Lazzarotto
- Section of Microbiology, Department of Medical and Surgical Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy
- Microbiology Unit, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Bianca Maria Piraccini
- Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
- Section of Dermatology, Department of Medical and Surgical Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy
| | - Antonella Marangoni
- Section of Microbiology, Department of Medical and Surgical Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy
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Fernández Manandu H, Molina Iturritza E, San José Muñiz I, Urrestarazu Larrañaga M. [ Neisseria meningitidis, beyond the afectation of the central nervous system]. Rev Esp Quimioter 2023; 36:539-540. [PMID: 37256911 PMCID: PMC10586736 DOI: 10.37201/req/015.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/08/2023] [Accepted: 03/23/2023] [Indexed: 06/02/2023]
Affiliation(s)
- H Fernández Manandu
- Hansanee Fernandez Manandu, Servicio de Medicina Interna del Hospital Universitario de Álava. Spain.
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Tayimetha CY, Njunda LA, Akenji B, Founou RC, Feteh V, Zofou D, Chafa A, Oyono Y, Etogo B, Tseuko D, Fonkoua MC, Harrison OB. Phenotypic and genotypic characterization of Neisseria gonorrhoeae isolates from Yaoundé, Cameroon, 2019 to 2020. Microb Genom 2023; 9:mgen001091. [PMID: 37590058 PMCID: PMC10483411 DOI: 10.1099/mgen.0.001091] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 07/31/2023] [Indexed: 08/18/2023] Open
Abstract
This study investigated antimicrobial resistance (AMR) phenotypes and genotypes exhibited by Neisseria gonorrhoeae from Yaoundé, Cameroon. AMR to tetracycline, penicillin and ciprofloxacin was observed although none of the isolates had reduced susceptibility to azithromycin, cefixime or ceftriaxone. Whole genome sequence (WGS) data were obtained and, using a threshold of 300 or fewer locus differences in the N. gonorrhoeae core gene multilocus sequence typing (cgMLST) scheme, four distinct core genome lineages were identified. Publicly available WGS data from 1355 gonococci belonging to these four lineages were retrieved from the PubMLST database, allowing the Cameroonian isolates to be examined in the context of existing data and compared with related gonococci. Examination of AMR genotypes in this dataset found an association between the core genome and AMR with, for example, isolates belonging to the core genome group, Ng_cgc_300 : 21, possessing GyrA and ParC alleles with amino acid substitutions conferring high-level resistance to ciprofloxacin while lineages Ng_cgc_300 : 41 and Ng_cgc_300 : 243 were predicted to be susceptible to several antimicrobials. A core genome lineage, Ng_cgc_300 : 498, was observed which largely consisted of gonococci originating from Africa. Analyses from this study demonstrate the advantages of using the N. gonorrhoeae cgMLST scheme to find related gonococci to carry out genomic analyses that enhance our understanding of the population biology of this important pathogen.
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Affiliation(s)
- Carolle Yanique Tayimetha
- Faculty of Health Sciences of the University of Buea, Buea, Cameroon
- National Public Health Laboratory, Yaounde, Cameroon
| | | | - Blaise Akenji
- National Public Health Laboratory, Yaounde, Cameroon
| | - Raspail Carrel Founou
- Department of Microbiology, Haematology and Immunology of University of Dschang, Dschang, Cameroon
| | - Vitalis Feteh
- Faculty of Health Sciences of the University of Buea, Buea, Cameroon
| | - Denis Zofou
- Faculty of Health Sciences of the University of Buea, Buea, Cameroon
| | - Anicet Chafa
- Medical Bacteriology Laboratory of University Hospital Center, Yaoundé, Cameroon
| | - Yannick Oyono
- Faculty of Health Sciences of the University of Buea, Buea, Cameroon
| | | | - Dorine Tseuko
- National Public Health Laboratory, Yaounde, Cameroon
| | - Marie Christine Fonkoua
- Centre Pasteur du Cameroon, Yaoundé, Cameroon
- Cameroonian Society of Microbiology, Yaoundé, Cameroon
| | - Odile B. Harrison
- Department of Biology, University of Oxford, Oxford, UK
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
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Arenas J. Editorial: Pathogenic Neisseria: Pathogenicity, vaccines, and antibiotic resistance. Front Cell Infect Microbiol 2023; 12:1119244. [PMID: 36683679 PMCID: PMC9850228 DOI: 10.3389/fcimb.2022.1119244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 12/21/2022] [Indexed: 01/06/2023] Open
Affiliation(s)
- Jesús Arenas
- Unit of Microbiology and Immunology, Faculty of Veterinary, University of Zaragoza, Zaragoza, Spain
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Teixeira da Silva D, Petsis D, Santos T, Mahajan A, Bonett S, Wood S. Chlamydia Trachomatis/ Neisseria Gonorrhea Retesting Among Adolescents and Young Adults in a Primary Care Network. J Adolesc Health 2022; 71:545-551. [PMID: 35963759 PMCID: PMC9588690 DOI: 10.1016/j.jadohealth.2022.06.014] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 05/12/2022] [Accepted: 06/23/2022] [Indexed: 11/22/2022]
Abstract
PURPOSE Chlamydia trachomatis/Neisseria gonorrhea (CT/NG) retesting three months after diagnosis is a guideline-recommended strategy to detect re-infections. Adolescents and young adults are priority populations in the U.S. Sexually Transmitted Infections National Strategic Plan, but there is a lack of research examining CT/NG retesting among these populations. This study describes retesting following CT/NG diagnosis among adolescent and young adult patients at Title X and non-Title X clinics and measures the association of patient-level factors with CT/NG retesting. METHODS We evaluated electronic medical records from 2014 to 2020 from an academic urban-suburban primary care network. The primary outcome was retesting, defined as a diagnostic test for CT or NG ordered 8-16 weeks after index diagnosis. Mixed effects logistic regression modeling stratified by Title X funding was conducted to evaluate the association of patient-level factors with CT/NT retesting. RESULTS Overall, 23.5% (n = 731) of patients were retested within 8-16 weeks following index CT/NG diagnosis. A significantly greater proportion of Title X patients were retested compared to non-Title X patients. Males were significantly less likely to be retested compared to females, and the proportion of patients retested decreased significantly over the study period. DISCUSSION Guideline-recommended retesting following CT/NG diagnosis was low in this young primary care cohort, especially among male and non-Title X clinic patients. Decreases in CT/NG retesting over the study period may be contributing to worsening of the STI epidemic. Our results provide insights into CT/NG retesting that can inform efforts to end the STI epidemic.
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Affiliation(s)
- Daniel Teixeira da Silva
- National Clinician Scholars Program, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Adolescent Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Department of Family and Community Health, School of Nursing, University of Pennsylvania, Philadelphia, Pennsylvania.
| | - Danielle Petsis
- Department of Adolescent Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Tatiane Santos
- The Wharton School, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Anjali Mahajan
- Department of Adolescent Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Stephen Bonett
- Department of Adolescent Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Department of Family and Community Health, School of Nursing, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Sarah Wood
- Department of Adolescent Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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Koiyama MFG, De Sousa ATHI, Dos Santos TÁ, De Barros MA, Jaworski LTDBN, Néspoli PEB, Mendonça AJ, Colodel EM, Dutra V, Sousa VRF. Commensal and multidrug-resistant Neisseria spp. sepsis in feline. J Infect Dev Ctries 2022; 16:1517-1523. [PMID: 36223630 DOI: 10.3855/jidc.13165] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 09/21/2020] [Indexed: 06/16/2023] Open
Abstract
INTRODUCTION Sepsis is a serious problem in felines with a mortality rate ranging from 29-79%. Neisseria spp. is considered a commensal microorganism of the oral cavity of dogs and cats and is usually isolated from human wounds resulting from bites of these animals. CASE REPORT The present report describes clinical, imaging and laboratory findings of a feline with sepsis wherein commensal and multidrug-resistant (MDR) Neisseria spp. was isolated. The feline presented a history of four days of anorexia, dyspnea, prostration, and, pericardial, pleural and abdominal effusions. Pericardiocentesis was performed and hemorrhagic exudate was observed. The animal died after 11 days of treatment with gentamicin and amoxicillin combined with clavulanic acid. During necropsy, the abdominal cavity was found to be filled with greenish-yellow content and the pericardial sac was thickened with a large amount of purulent secretion. Histopathology revealed sepsis with necrotizing suppurative pericarditis, diffuse mononuclear pneumonia and necrotic pleuritis, leading to secondary bacterial infection. CONCLUSIONS Commensal Neisseria spp. are important zoonotic bacteria, which trigger a serious disease in felines. However, it has not been reported to cause sepsis with pneumonia, suppurative necrotizing pericarditis and pericardial effusion.
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Affiliation(s)
| | | | - Tarcísio Ávila Dos Santos
- Uniprofessional Residency Program in Veterinary Medicine, Universidade Federal de Mato Grosso, UFMT, Cuiabá, MT, Brazil
| | - Marisol Alves De Barros
- Uniprofessional Residency Program in Veterinary Medicine, Universidade Federal de Mato Grosso, UFMT, Cuiabá, MT, Brazil
| | | | | | - Adriane Jorge Mendonça
- Professor Faculty of Veterinary Medicine, FAVET, Universidade Federal de Mato Grosso, Cuiabá, UFMT, Cuiabá, Brazil
| | - Edson Moleta Colodel
- Professor Faculty of Veterinary Medicine, FAVET, Universidade Federal de Mato Grosso, Cuiabá, UFMT, Cuiabá, Brazil
| | - Valéria Dutra
- Professor Faculty of Veterinary Medicine, FAVET, Universidade Federal de Mato Grosso, Cuiabá, UFMT, Cuiabá, Brazil
| | - Valéria Régia Franco Sousa
- Professor Faculty of Veterinary Medicine, FAVET, Universidade Federal de Mato Grosso, Cuiabá, UFMT, Cuiabá, Brazil.
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Christodoulides M. Update on the Neisseria Macrophage Infectivity Potentiator-Like PPIase Protein. Front Cell Infect Microbiol 2022; 12:861489. [PMID: 35392612 PMCID: PMC8981591 DOI: 10.3389/fcimb.2022.861489] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 01/24/2022] [Accepted: 02/07/2022] [Indexed: 11/16/2022] Open
Abstract
Neisseria pathogens express a Macrophage Infectivity Potentiator Protein (MIP), which belongs to the FK506 binding protein (FKBP) family of proteins that exhibit peptidyl-prolyl cis/trans isomerase (PPIase) activity. Neisseria MIP proteins are potential candidates for inclusion into vaccines for gonorrhoea caused by N. gonorrhoeae infection, and meningitis/sepsis caused by M. meningitidis infection. Neisseria MIP proteins are also potential targets for directed drug treatments, although this remains relatively unexplored. In this mini-review, we provide an update into the vaccine potential of Neisseria MIP and the few published drug targeting studies, and explore further the diversity of this protein amongst both pathogenic and commensal Neisseria spp.
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Sarwar F, Alam K, Chow CW, Saeed M, Malik RN. Pulmonary Dysfunction Augmenting Bacterial Aerosols in Leather Tanneries of Punjab, Pakistan. Int J Chron Obstruct Pulmon Dis 2021; 16:2925-2937. [PMID: 34737557 PMCID: PMC8560504 DOI: 10.2147/copd.s328129] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/27/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Particulate matter-associated microbes in the workplace are a burning issue in occupational toxicology. Studies have reported on respiratory infections among tannery cohorts. This study uniquely presents measurements of airborne bacterial concentrations associated with varied particulate-matter sizes, their exposure, and consequent severity in occupational respiratory problems, all for different microenvironments within leather tanneries. METHODS Analyses included molecular identification of isolates, computation of mass median aerodynamic diameter of aerosols, tannery process-exposure dose (TPED) to bacterial aerosols, and spirometry and symptom assessment of impaired pulmonary function. RESULTS The highest bacterial concentrations were for rawhide treatment and finishing units, showing 3.6×103 and 3.7×103 CFU/m3, respectively. Identified bacterial species included Ochrobactrum pseudogrignonense, Neisseria bacilliformis, Enterobacter cloacae, Alcaligenes faecalis, Klebsiella pneumoniae, and Corynebacterium spp. Maximum and minimum values of mass median aerodynamic diameter were 8.3 µm and 0.65 µm for buffing and snuffing and production units, respectively. The highest TPED was 1,516.9 CFU/kg for finishing units. Respiratory symptoms in order of incidence were dyspnea > phlegm > cough > wheezing and tachypnea (equivalent). Bronchodilator measurements of FEV1, FVC, and PEF represent decline in lung function. Of 26 patients identified with COPD, most were working in rawhide treatment. CONCLUSION We conclude that exposure-infection synergy is also a cause of pulmonary ailments and COPD development, rather than the better-known exposure-smoking synergy.
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Affiliation(s)
- Fiza Sarwar
- Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Khan Alam
- Department of Physics, University of Peshawar, Peshawar, Pakistan
| | - Chung Wai Chow
- Dalla Lana School of Public Health, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Muhammad Saeed
- Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Riffat Naseem Malik
- Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Quaid-i-Azam University, Islamabad, Pakistan
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Vargas AA, Boudreaux DM, Erley KJ, Ange BL, Johnson TM. Time- and Species-Dependent Bacterial Adhesion to Titanium over Short Exposure Periods: An In Vitro Study. Med J (Ft Sam Houst Tex) 2021:65-73. [PMID: 34714925] [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] [Indexed: 06/13/2023]
Abstract
A considerable percentage of dental implant patients experience biofilm-mediated peri-implant disease following transmucosal abutment application. Bacterial adhesion is an early step in biofilm development. Our purpose was to assess adhesion of specific bacterial species to titanium over short exposure periods. Eight bacterial species were selected for this analysis: Streptococcus oralis, Streptococcus mitis, Gemella haemolysans, Streptococcus gordonii, Streptococcus sanguinis, Neisseria flavescens, Streptococcus salivarius, and Pseudomonas aeruginosa. We cultured each species with appropriate media and exposed titanium foil discs to the bacteria for 60, 15, 5, 1, or 0.25 minutes. Optical density at 600-nm wavelength (OD600) was assessed for the baseline inoculum and each species/exposure combination. The proportion of bacteria adherent to titanium was determined for each experimental condition. Striking titanium adhesion was noted for all evaluated species even when exposure time was limited to 15 seconds. Strategies to limit bacterial adhesion at dental implant surfaces may offer potential for improved treatment outcomes and preservation of peri-implant health.
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Affiliation(s)
- Anthony A Vargas
- Chief of Periodontics, US Army Dental Health Activity, Fort Polk, LA
| | - Daniel M Boudreaux
- Microbiologist, Department of Clinical Investigations, Dwight David Eisenhower Army Medical Center, Fort Gordon, GA
| | - Kenneth J Erley
- Assistant Professor, Department of Periodontics, Dental College of Georgia, Augusta University, Augusta, GA
| | - Brittany L Ange
- Assistant Professor, Department of Population Health Sciences Biostatistics and Data Science Division, Medical College of Georgia, Augusta University, Augusta, GA
| | - Thomas M Johnson
- Professor, Department of Periodontics, Army Postgraduate Dental School, Uniformed Services University of the Health Sciences, Fort Gordon, GA
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Affiliation(s)
- Huan Vinh Dong
- Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Paul C Adamson
- Division of Infectious Diseases, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Hoa Thi Nguyen
- Department of Microbiology, National Hospital for Tropical Medicine, Hanoi, Vietnam
| | - Trung Vu Nguyen
- Department of Microbiology, National Hospital for Tropical Medicine, Hanoi, Vietnam
| | - Giang Minh Le
- Center for Research and Training on Substance Abuse-HIV (CREATA-H), Hanoi Medical University, Hanoi, Vietnam
| | - Jeffrey D Klausner
- Division of Infectious Diseases, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
- Field School of Public Health at UCLA, Los Angeles, California, USA
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Abstract
The Gram-negative diplococcus Neisseria macacae is a commensal bacterium of the mucosal surfaces in humans. A 52-year-old woman receiving continuous ambulatory peritoneal dialysis was admitted because of abdominal pain and turbid peritoneal fluid. N. macacae was isolated from peritoneal fluid culture and showed susceptibility to ceftriaxone. Despite appropriate antibiotics, the peritonitis was refractory, leading to the removal of the peritoneal dialysis catheter. We herein report the first case of peritoneal dialysis peritonitis caused by Neisseria macacae and review previous case reports of N. macacae infection in humans.
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Affiliation(s)
- Takuji Iyama
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Japan
| | - Shintaro Hamada
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Japan
| | - Tomoaki Takata
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Japan
| | - Shotaro Hoi
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Japan
| | - Satoko Fukuda
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Japan
| | - Hajime Isomoto
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Japan
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Dong HV, Pham LQ, Nguyen HT, Nguyen MXB, Nguyen TV, May F, Le GM, Klausner JD. Decreased Cephalosporin Susceptibility of Oropharyngeal Neisseria Species in Antibiotic-using Men Who Have Sex With Men in Hanoi, Vietnam. Clin Infect Dis 2020; 70:1169-1175. [PMID: 31049592 PMCID: PMC7319061 DOI: 10.1093/cid/ciz365] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 04/30/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Neisseria gonorrhoeae (NG) infections are a global health burden. NG resistance to cephalosporins, which is increasingly reported, is an imminent threat to public health. Many hypothesize that commensal Neisseria species are an important reservoir for genetic material conferring antimicrobial resistance in NG; however, clinical data are lacking. METHODS Men who have sex with men (MSM) in Hanoi, Vietnam, completed a questionnaire regarding antibiotic use. We collected pharyngeal specimens, cultured Neisseria species, and measured minimum inhibitory concentrations (MICs) to ciprofloxacin, cefixime, ceftriaxone, and cefpodoxime. Using MIC criteria for antimicrobial susceptibility in NG, we categorized the Neisseria species and compared mean MIC levels between different antibiotic user groups. RESULTS Of 207 participants, 38% used at least 1 antibiotic in the past 6 months; 52% without a prescription. A median of 1 Neisseria species was cultured from each participant (range, 1-4) with 10 different Neisseria species identified overall. The proportion of Neisseria with reduced susceptibility to ciprofloxacin was 93%, cefpodoxime 84%, cefixime 31%, and ceftriaxone 28%. Antibiotic use within the past month was strongly associated with Neisseria species having increased MICs to cefixime, ceftriaxone, and cefpodoxime (mean MIC ratios of 6.27, 4.11, and 7.70, respectively), compared with those who used antibiotics between 1 and 6 months prior (P < .05, all comparisons). CONCLUSIONS MSM in our study often used antibiotics without a prescription. At least 1 commensal Neisseria species colonized all men. Recent use of any antibiotics may select for oropharyngeal Neisseria species with antimicrobial resistance. The normal flora of the oropharynx may be an important source of antimicrobial resistance in Neisseria gonorrhoeae.
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Affiliation(s)
- Huan V Dong
- Charles R. Drew University of Medicine and Sciences
- Department of Medicine, David Geffen School of Medicine
| | - Loc Q Pham
- Fielding School of Public Health, University of California, Los Angeles
- Center for Research and Training on Substance Abuse–HIV, Hanoi Medical University
| | - Hoa T Nguyen
- Department of Microbiology, National Hospital for Tropical Diseases, Hanoi, Vietnam
| | - Minh X B Nguyen
- Center for Research and Training on Substance Abuse–HIV, Hanoi Medical University
- Department of Health Behavior, University of North Carolina at Chapel Hill
| | - Trung V Nguyen
- Department of Microbiology, National Hospital for Tropical Diseases, Hanoi, Vietnam
- Department of Microbiology, Hanoi Medical University, Vietnam
| | - Folasade May
- Department of Medicine, David Geffen School of Medicine
| | - Giang M Le
- Center for Research and Training on Substance Abuse–HIV, Hanoi Medical University
| | - Jeffrey D Klausner
- Department of Medicine, David Geffen School of Medicine
- Fielding School of Public Health, University of California, Los Angeles
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Fleming BA, Mulvey MA. Commensal Strains of Neisseria Use DNA to Poison Their Pathogenic Rivals. Cell Host Microbe 2019; 26:156-158. [PMID: 31415746 DOI: 10.1016/j.chom.2019.07.014] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Commensal bacteria can interfere with colonization of the host by infiltrating pathogens. In this issue of Cell Host & Microbe, Kim et al. (2019) describe an intriguing mechanism of colonization resistance driven by the mismatching of methylation patterns following uptake of commensal-derived DNA by pathogenic strains of Neisseria.
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Affiliation(s)
- Brittany A Fleming
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112-0565, USA
| | - Matthew A Mulvey
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112-0565, USA.
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Zhou Z, Mondal M, Liao G, Guo Z. Synthesis and evaluation of monophosphoryl lipid A derivatives as fully synthetic self-adjuvanting glycoconjugate cancer vaccine carriers. Org Biomol Chem 2014; 12:3238-45. [PMID: 24728423 PMCID: PMC4074652 DOI: 10.1039/c4ob00390j] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A fully synthetic carbohydrate-based cancer vaccine is an attractive concept, but an important topic in the area is to develop proper vaccine carriers that can improve the immunogenicity and other immunological properties of tumor-associated carbohydrate antigens (TACAs). In this context, four monophosphoryl derivatives of Neisseria meningitidis lipid A were synthesized via a highly convergent and effective strategy and evaluated as vaccine carriers and adjuvants. The conjugates of these monophosphoryl lipid A (MPLA) derivatives with a modified form of the sTn antigen were found to elicit high titers of antigen-specific IgG antibodies, indicating a T cell-dependent immune response, in the absence of an external adjuvant. It was concluded that MPLAs could be utilized as potent vaccine carriers and built-in adjuvants to create fully synthetic self-adjuvanting carbohydrate-based cancer vaccines. The lipid composition and structure of MPLA were shown to have a significant influence on its immunological activity, and among the MPLAs examined, natural N. meningitidis MPLA exhibited the most promising properties. Moreover, Titermax Gold, a conventional vaccine adjuvant, was shown to inhibit, rather than promote, the immunological activity of MPLA conjugates, maybe via interacting with MPLA.
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Affiliation(s)
- Zhifang Zhou
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA.
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Jyssum S, Jyssum K. Specific uptake of homologous DNA accompanying transformation in Neisseria meningitidis. Acta Pathol Microbiol Scand B Microbiol Immunol 2009; 78:140-8. [PMID: 4992244 DOI: 10.1111/j.1699-0463.1970.tb04280.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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MOFFETT M, YOUNG JL, STUART RD. Centralized gonococcus culture for dispersed clinics; the value of a new transport medium for gonococci and trichomonas. Br Med J 2008; 2:421-4. [PMID: 18879145 DOI: 10.1136/bmj.2.4573.421] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
Human monogenic disorders affecting immunity to infection are increasingly recognized. Most are associated with primary immunodeficiencies, which typically confer predisposition to multiple infectious diseases. We review here the known, atypical monogenic disorders that confer a narrow vulnerability to infection with specific microorganisms in otherwise healthy individuals. These 'experiments of nature' have important immunological and clinical implications.
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Affiliation(s)
- Capucine Picard
- Laboratoire de Génétique Humaine des Maladies Infectieuses, Université de Paris René Descartes-INSERM U550, Faculté de Médecine Necker, 156 Rue de Vaugirard, 75015 Paris, France
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Affiliation(s)
- E J Hehre
- Department of Bacteriology and Immunology, Cornell University Medical College, New York, New York
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Lavigne JP, Le Bayon A, Michaux-Charachon S, Arich C, Bouziges N, Campello C, Sotto A. [Neisseria subflava subsp. perfiava bacteremia: a case study and literature review]. Med Mal Infect 2004; 34:331-2. [PMID: 15679240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Affiliation(s)
- J P Lavigne
- Laboratoire de bactériologie, virologie, parasitologie, CHU de Nîmes, groupe hospitalo-universitaire de Carémeau, place du Pr.-Robert-Debré, 30029 Nîmes cedex 9, France
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FITTING C, SCHERP HW. Observations on a strain of Neisseria meningitides in the presence of glucose and maltose. II. Studies with washed cells1. J Bacteriol 2004; 63:545-60. [PMID: 14938328 PMCID: PMC169306 DOI: 10.1128/jb.63.4.545-560.1952] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Goscinski G, Lundholm M, Odenholt I, Sjölin J. Variation in the propensity to release endotoxin after cefuroxime exposure in different gram-negative bacteria: uniform and dose-dependent reduction by the addition of tobramycin. Scand J Infect Dis 2003; 35:40-6. [PMID: 12685883 DOI: 10.1080/0036554021000026983] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
An aminoglycoside in combination with a beta-lactam antibiotic is often recommended for the treatment of severe infections. The aim of the present study was to study whether cefuroxime-induced endotoxin release could be reduced by addition of tobramycin in different Gram-negative bacteria and how endotoxin release was affected by bacterial killing rate and number of killed bacteria. Three Escherichia coli strains, 1 Klebsiella, 1 Salmonella and 1 Neisseria strain were exposed in vitro to 2, 10 and 50 x minimum inhibitory concentration of cefuroxime, tobramycin or a combination of both. The cefuroxime-induced endotoxin release in the 6 strains varied from 0.1 to 9.9 x 10(-3) EU/killed bacterium. By adding tobramycin, highly significant reductions of 96%, 93%, 97%, 86% and 85% were seen in the 3 E. coli strains and in the Klebsiella and the Salmonella strain, respectively. In the Neisseria strain, the reduction was less. Increasing doses of tobramycin or the combination led to significant endotoxin release reduction in 4/6 strains. In conclusion, addition of tobramycin reduced penicillin-binding protein-3-beta-lactam binding-induced endotoxin release in all tested Gram-negative strains, despite a large interspecies variation in the propensity to release endotoxin. Besides broadening the spectrum and increasing the killing rate, this might be of benefit in the most severe forms of sepsis.
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Affiliation(s)
- Gunilla Goscinski
- Department of Medical Sciences, Section of Infectious Diseases, Antibiotic Research Unit, Uppsala University, Uppsala, Sweden.
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Capitini CM, Herrero IA, Patel R, Ishitani MB, Boyce TG. Wound infection with Neisseria weaveri and a novel subspecies of pasteurella multocida in a child who sustained a tiger bite. Clin Infect Dis 2002; 34:E74-6. [PMID: 12032914 DOI: 10.1086/340712] [Citation(s) in RCA: 27] [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] [Received: 10/29/2001] [Revised: 01/15/2002] [Indexed: 11/03/2022] Open
Abstract
A 7-year-old girl developed a wound infection as a result of a tiger bite she sustained. DNA sequence analysis revealed that the causative organisms were Neisseria weaveri and what is, to our knowledge, a previously undescribed subspecies of Pasteurella multocida, for which we propose the designation "Pasteurella multocida subspecies tigris subspecies nov."
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Affiliation(s)
- Christian M Capitini
- University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
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Abstract
The Fe(3+) binding site of recombinant nFbp, a ferric-binding protein found in the periplasmic space of pathogenic Neisseria, has been characterized by physicochemical techniques. An effective Fe(3+) binding constant in the presence of 350 microm phosphate at pH 6.5 and 25 degrees C was determined as 2.4 x 10(18) m(-1). EPR spectra for the recombinant Fe(3+)nFbp gave g' = 4.3 and 9 signals characteristic of high spin Fe(3+) in a strong ligand field of low (orthorhombic) symmetry. (31)P NMR experiments demonstrated the presence of bound phosphate in the holo form of nFbp and showed that phosphate can be dialyzed away in the absence of Fe(3+) in apo-nFbp. Finally, an uncorrected Fe(3+/2+) redox potential for Fe-nFbp was determined to be -290 mV (NHE) at pH 6.5, 20 degrees C. Whereas our findings show that nFbp and mammalian transferrin have similar Fe(3+) binding constants and EPR spectra, they differ greatly in their redox potentials. This has implications for the mechanism of Fe transport across the periplasmic space of Gram-negative bacteria.
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Affiliation(s)
- C H Taboy
- Department of Chemistry, Duke University, Durham, North Carolina 27708, USA
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CURTIS FR, WILKINSON AE. A comparison of the in vitro sensitivity of gonococci to penicillin with the results of treatment. Sex Transm Infect 2000; 34:70-8; discussion 78-82. [PMID: 13560791 PMCID: PMC1047172 DOI: 10.1136/sti.34.2.70] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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42
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Affiliation(s)
- O Billker
- Max-Planck-Institut für Infektionsbiologie, Abteilung Molekulare Biologie, Monbijoustrasse 2, 10117 Berlin, Germany
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BARRY GT, ABBOTT V, TSAI T. Relationship of colominic acid (poly N-acetylneuraminic acid) to bacteria which contain neuraminic acid. ACTA ACUST UNITED AC 1998; 29:335-52. [PMID: 13969585 DOI: 10.1099/00221287-29-2-335] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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44
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CROOKES EM, STUART RD. The value of aerosporin in the isolation of Neisseria from swabs forwarded to the laboratory in transport medium. ACTA ACUST UNITED AC 1998; 78:283-8. [PMID: 13812980 DOI: 10.1002/path.1700780132] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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46
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Affiliation(s)
- E A Dominguez
- Department of Medicine, Creighton-University of Nebraska Medical Center, Omaha, USA
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47
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Geisler WM, Markovitz DM. Septic arthritis caused by Neisseria sicca. J Rheumatol Suppl 1998; 25:826-8. [PMID: 9558202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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48
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Unkel JH, McKibben DH, Fenton SJ, Nazif MM, Moursi A, Schuit K. Comparison of odontogenic and nonodontogenic facial cellulitis in a pediatric hospital population. Pediatr Dent 1997; 19:476-9. [PMID: 9442541] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Facial cellulitis in the pediatric hospital population can be classified as odontogenic and nonodontogenic. Emergency departments welcome timely diagnosis from consultants as cellulitis is associated with significant morbidity in children. The purpose of this retrospective study is to assist pediatric dentists in recognizing differences between odontogenic and nonodontogenic facial cellulitis and to determine whether odontogenic infections make up a major portion of facial swellings seen upon admission to the hospital. The completed medical records of 100 patients admitted to Children's Hospital of Pittsburgh from 1980-1989 with an ICD-9 diagnosis of facial cellulitis were reviewed. The types of cellulitis were differentiated using admission data. The information reviewed included age, sex, temperature, white blood cell count, location of facial infection, and season of the year. Odontogenic cellulitis comprised approximately 50% of the total hospital facial infections of the records reviewed during the 10-year period. Upon admission, patients with odontogenic and nonodontogenic facial cellulitis have similarities (season of onset during the year, febrile temperature, and location of infection) and differences (mean admission temperature, age at time of affliction, white blood cell count, and most commonly occurring microorganisms.
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Affiliation(s)
- J H Unkel
- Department of Pediatric Dentistry, University of Tennessee-Memphis, USA
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Abstract
Pyocolpos is a rare complication of hydrocolpos. Hydrocolpos usually presents during adolescence and is associated with an imperforate hymen. The following is a case of a 3-month-old girl with pyocolpos. Her history was significant for a urinary tract infection (UTI) at 7 weeks of age. The authors believe that her UTI was caused by urinary retention secondary to hydrocolpos. A complete evaluation may have prevented the complication of pyocolpos.
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Affiliation(s)
- L S Brevetti
- Department of Surgery, University of Iowa College of Medicine, Iowa City, USA
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50
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