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Jesus HNR, Rocha DJPG, Ramos RTJ, Silva A, Brenig B, Góes-Neto A, Costa MM, Soares SC, Azevedo V, Aguiar ERGR, Martínez-Martínez L, Ocampo A, Alibi S, Dorta A, Pacheco LGC, Navas J. Pan-genomic analysis of Corynebacterium amycolatum gives insights into molecular mechanisms underpinning the transition to a pathogenic phenotype. Front Microbiol 2022; 13:1011578. [DOI: 10.3389/fmicb.2022.1011578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 10/17/2022] [Indexed: 11/17/2022] Open
Abstract
Corynebacterium amycolatum is a nonlipophilic coryneform which is increasingly being recognized as a relevant human and animal pathogen showing multidrug resistance to commonly used antibiotics. However, little is known about the molecular mechanisms involved in transition from colonization to the MDR invasive phenotype in clinical isolates. In this study, we performed a comprehensive pan-genomic analysis of C. amycolatum, including 26 isolates from different countries. We obtained the novel genome sequences of 8 of them, which are multidrug resistant clinical isolates from Spain and Tunisia. They were analyzed together with other 18 complete or draft C. amycolatum genomes retrieved from GenBank. The species C. amycolatum presented an open pan-genome (α = 0.854905), with 3,280 gene families, being 1,690 (51.52%) in the core genome, 1,121 related to accessory genes (34.17%), and 469 related to unique genes (14.29%). Although some classic corynebacterial virulence factors are absent in the species C. amycolatum, we did identify genes associated with immune evasion, toxin, and antiphagocytosis among the predicted putative virulence factors. Additionally, we found genomic evidence for extensive acquisition of antimicrobial resistance genes through genomic islands.
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Soltan Mohammadi N, Mafakheri S, Abdali N, Bárcena-Uribarri I, Tauch A, Benz R. Identification and characterization of the channel-forming protein in the cell wall of Corynebacterium amycolatum. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2013; 1828:2574-82. [PMID: 23811360 DOI: 10.1016/j.bbamem.2013.06.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 06/10/2013] [Accepted: 06/17/2013] [Indexed: 10/26/2022]
Abstract
The mycolic-acid layer of certain gram-positive bacteria, the mycolata, represents an additional permeability barrier for the permeation of small water-soluble solutes. Consequently, it was shown in recent years that the mycolic acid layer of individual bacteria of the group mycolata contains pores, called porins, for the passage of hydrophilic solutes. Corynebacterium amycolatum, a pathogenic Corynebacterium species, belongs to the Corynebacteriaceae family but it lacks corynomycolic acids in its cell wall. Despite the absence of corynomycolic acids the cell wall of C. amycolatum contains a cation-selective cell wall channel, which may be responsible for the limited permeability of the cell wall of C. amycolatum. Based on partial sequencing of the protein responsible for channel formation derived from C. amycolatum ATCC 49368 we were able to identify the gene coram0001_1986 within the known genome sequence of C. amycolatum SK46 that codes for the cell wall channel. The corresponding gene of C. amycolatum ATCC 49368 was cloned into the plasmid pXHis for its expression in Corynebacterium glutamicum ∆porA∆porH. Biophysical characterization of the purified protein (PorAcoram) suggested that coram0001_1986 is indeed the gene coding for the pore-forming protein PorAcoram in C. amycolatum ATCC 49368. The protein belongs to the DUF (Domains of Unknown Function) 3068 superfamily of proteins, mainly found in bacteria from the family Corynebacteriaceae. The nearest relative to PorAcoram within this family is an ORF which codes for PorAcres, which was also recognized in reconstitution experiments as a channel-forming protein in Corynebacterium resistens.
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Affiliation(s)
- Nafiseh Soltan Mohammadi
- School of Engineering and Science, Jacobs University Bremen, Campusring 1, 28759 Bremen, Germany
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Reddy BS, Chaudhury A, Kalawat U, Jayaprada R, Reddy G, Ramana BV. Isolation, speciation, and antibiogram of clinically relevant non-diphtherial Corynebacteria (Diphtheroids). Indian J Med Microbiol 2012; 30:52-7. [PMID: 22361761 DOI: 10.4103/0255-0857.93033] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
PURPOSE Coryneform or the non-diphtherial Corynebacterium species largely remains a neglected group with the traditional consideration of these organisms as contaminants. This concept, however, is slowly changing in the light of recent observations. This study has been done to find out the species distribution and antibiogram of various members of the clinically relevant Coryneform group, isolated from various clinical materials. MATERIALS AND METHODS One hundred and fourteen non-duplicate isolates of diphtheroids from various clinical isolates were selected for the study. The isolates were identified to the species level by using a battery of tests; and antimicrobial susceptibility was tested by using a combination of Clinical and Laboratory Standards Institute (CLSI) and the British Society for Antimicrobial Chemotherapy (BSAC) guidelines, in the absence of definitive CLSI guidelines. RESULTS Corynebacterium amycolatum was the predominant species (35.9%) in our series followed by the CDC Group G organisms (15.7%). Each of the remaining 19 species comprised of less than 10% of the isolates. More than half the total isolates were resistant to the penicillins, erythromycin, and clindamycin; while excellent activity (all the strains being susceptible) was shown by vancomycin, linezolid, and tigecycline. Chloramphenicol and tetracycline also had good activity in inhibiting more than 80% of the isolates. Multiply drug resistance was exhibited by all the species. CONCLUSION This study was an attempt to establish the clinical significance of coryneform organisms. The high level of resistance shown by this group to some of the common antibacterial agents highlights the importance of processing these isolates in select conditions to guide the clinicians towards an appropriate therapy.
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Affiliation(s)
- B S Reddy
- Department of Microbiology, Sri Venkateswara Institute of Medical Sciences, Tirupati - 517 507, Andhra Pradesh, India
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Martins CAS, Faria LMD, Souza MC, Camello TCF, Velasco E, Hirata Jr R, Thuler LCS, Mattos-Guaraldi AL. Microbiological and host features associated with corynebacteriosis in cancer patients: a five-year study. Mem Inst Oswaldo Cruz 2009; 104:905-13. [DOI: 10.1590/s0074-02762009000600015] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Accepted: 08/20/2009] [Indexed: 11/22/2022] Open
Affiliation(s)
- CAS Martins
- Ministério da Saúde, Brasil; Universidade do Estado do Rio de Janeiro, Brasil
| | | | - MC Souza
- Universidade do Estado do Rio de Janeiro, Brasil
| | - TCF Camello
- Universidade do Estado do Rio de Janeiro, Brasil
| | | | - R Hirata Jr
- Universidade do Estado do Rio de Janeiro, Brasil
| | - LCS Thuler
- Universidade Federal do Rio de Janeiro, Brasil
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Dalal A, Urban C, Segal-Maurer S. Endocarditis due to Corynebacterium amycolatum. J Med Microbiol 2008; 57:1299-1302. [PMID: 18809563 DOI: 10.1099/jmm.0.2008/003343-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Corynebacterium amycolatum, a normal inhabitant of human skin, is a Gram-positive, non-spore-forming, mycolic acid-free, aerobic or facultative anaerobic bacillus. Since its description in 1988, it has only rarely been associated with infective endocarditis. This paper describes a case of infective endocarditis successfully treated by combination therapy with daptomycin and rifampicin. To the best of our knowledge, this is the first case report of C. amycolatum endocarditis from the USA successfully treated with these agents.
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Affiliation(s)
- Aman Dalal
- Division of Infectious Diseases, New York Hospital Queens, Flushing, NY, USA
| | - Carl Urban
- Department of Microbiology, Weill Cornell Medical College, NY, USA.,Division of Infectious Diseases, New York Hospital Queens, Flushing, NY, USA
| | - Sorana Segal-Maurer
- Department of Medicine, Weill Cornell Medical College, NY, USA.,Division of Infectious Diseases, New York Hospital Queens, Flushing, NY, USA
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Bernard KA, Munro C, Wiebe D, Ongsansoy E. Characteristics of rare or recently described corynebacterium species recovered from human clinical material in Canada. J Clin Microbiol 2002; 40:4375-81. [PMID: 12409436 PMCID: PMC139690 DOI: 10.1128/jcm.40.11.4375-4381.2002] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Nineteen new Corynebacterium species or taxa described since 1995 have been associated with human disease. We report the characteristics of 72 strains identified as or most closely resembling 14 of these newer, medically relevant Corynebacterium species or taxa, as well as describe in brief an isolate of Corynebacterium bovis, a rare pathogen for humans. The bacteria studied in this report were nearly all derived from human clinical specimens and were identified by a polyphasic approach. Most were characterized by nearly full 16S rRNA gene sequence analysis. Some isolates were recovered from previously unreported sources and exhibited unusual phenotypes or represented the first isolates found outside Europe. Products of fermentation, with emphasis on the presence or absence of propionic acid, were also studied in order to provide an additional characteristic with which to differentiate among phenotypically similar species.
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Affiliation(s)
- K A Bernard
- National Microbiology Laboratory, Health Canada, Winnipeg, Manitoba R3E 3R2, Canada.
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Voisin S, Deruaz D, Freney J, Renaud FNR. Differentiation of Corynebacterium amycolatum, C. minutissimum, C. striatum and related species by pyrolysis-gas-liquid chromatography with atomic emission detection. Res Microbiol 2002; 153:307-11. [PMID: 12160322 DOI: 10.1016/s0923-2508(02)01324-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We report here the application of pyrolysis-gas chromatography followed by atomic emission detection (AED) for the characterisation of Corynebacterium amycolatum and related species (i.e., C. striatum, C. minutissimum, C. xerosis and the recently described C. freneyi). This phenotypic method, which analyses the whole chemical composition of bacteria, clearly separates C. amycolatum from other species. Moreover, this C. amycolatum group is subdivided into two distinct subgroups. We cannot differentiate the C. minutissimum strains from those of C. striatum. On the other hand, C. freneyi and C. xerosis are clearly distinct from the other species.
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Affiliation(s)
- Sébastien Voisin
- Département de Chimie Analytique, Institut des Sciences Pharmaceutiques et Biologiques, Lyon, France.
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Knox KL, Holmes AH. [Description of 8 cases with gonadal dysgenesis syndrome type 46XY]. AKUSHERSTVO I GINEKOLOGIIA 2002; 42:9-12. [PMID: 11799760 PMCID: PMC2730276 DOI: 10.3201/eid0801.010151] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
It is described the clinical evaluation of eight cases with gonadal dysgenesis syndrome type 46XY diagnosed and followed in our division of Pediatric-Adolescent Gynecology since 1992 to January 2000. Two out of eight patients presented pure gonadal dysgenesis (Swyers syndrome), one presented 17-beta-hydroxysteroid-deydrogonase deficiency and the rest five presented Testicular Feminization Syndrome. The adolescents visited our department for the first time while being fifteen years old because of primary amenorrhea and growth retardation of secondary sex features. Apart from interview, physical and gynecological examination we performed complimentary haematological, biochemical, hormonal tests and confirmed the diagnosis by chromosomal analysis. Studying the upper and lower abdomen by the means of imaging methods (U/S and CT) we found out the presence of uterus and in few cases the gonadal position. Because of the high risk of malignancy all the patients underwent surgical gonadectomy. Postoperatively hormonal replacement therapy was administered to reinforce the female sex features and prevent the hormonal deficiency consequences like osteoporosis. The follow up included haematological, biochemical and hormonal tests. If uterus existed the endometrium thickness measured by ultrasound. Furthermore bone density, palpative and ultrasonography breast examination and investigation of possible psychological disorders insure the complete screening of the young "female" patients.
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Affiliation(s)
| | - Alison H. Holmes
- Imperial College School of Medicine, Hammersmith Hospital, London, United Kingdom
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Clarke R, Qamruddin A, Taylor M, Panigrahi H. Septic arthritis caused by Corynebacterium amycolatum following vascular graft sepsis. J Infect 1999; 38:126-7. [PMID: 10342655 DOI: 10.1016/s0163-4453(99)90082-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A case of septic arthritis caused by Corynebacterium amycolatum in a native hip joint occurred in an adult man following contralateral vascular graft sepsis, and was successfully treated with intravenous vancomycin followed by oral doxycycline and rifampicin. To the authors' knowledge, this is the only reported case of septic arthritis due to C. amycolatum.
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Affiliation(s)
- R Clarke
- Department of Microbiology, North Manchester General Hospital, Crumpsall, UK
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Renaud FN, Dutaur M, Daoud S, Aubel D, Riegel P, Monget D, Freney J. Differentiation of Corynebacterium amycolatum, C. minutissimum, and C. striatum by carbon substrate assimilation tests. J Clin Microbiol 1998; 36:3698-702. [PMID: 9817901 PMCID: PMC105268 DOI: 10.1128/jcm.36.12.3698-3702.1998] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
We tested the carbon substrate assimilation patterns of 40 Corynebacterium amycolatum strains, 19 C. minutissimum strains, 50 C. striatum strains, and 1 C. xerosis strain with the Biotype 100 system (bioMérieux, Marcy-l'Etoile, France). Twelve carbon substrates of 99 allowed discrimination among the species tested. Additionally, assimilation of 3 of these 12 carbon substrates (maltose, N-acetyl-D-glucosamine, and phenylacetate) was tested with the API 20 NE identification system (bioMérieux). Since concordant results were observed with the two systems for these three carbon substrates, either identification system can be used as a supplementary tool to achieve phenotypic differential identification of C. amycolatum, C. minutissimum, and C. striatum in the clinical microbiology laboratory.
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Affiliation(s)
- F N Renaud
- DERBA UPRES EA 1655, Faculté de Médecine RTH Laennec, 69372 Lyon, France.
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Funke G, von Graevenitz A, Clarridge JE, Bernard KA. Clinical microbiology of coryneform bacteria. Clin Microbiol Rev 1997; 10:125-59. [PMID: 8993861 PMCID: PMC172946 DOI: 10.1128/cmr.10.1.125] [Citation(s) in RCA: 612] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Coryneform bacteria are aerobically growing, asporogenous, non-partially-acid-fast, gram-positive rods of irregular morphology. Within the last few years, there has been a massive increase in the number of publications related to all aspects of their clinical microbiology. Clinical microbiologists are often confronted with making identifications within this heterogeneous group as well as with considerations of the clinical significance of such isolates. This review provides comprehensive information on the identification of coryneform bacteria and outlines recent changes in taxonomy. The following genera are covered: Corynebacterium, Turicella, Arthrobacter, Brevibacterium, Dermabacter. Propionibacterium, Rothia, Exiguobacterium, Oerskovia, Cellulomonas, Sanguibacter, Microbacterium, Aureobacterium, "Corynebacterium aquaticum," Arcanobacterium, and Actinomyces. Case reports claiming disease associations of coryneform bacteria are critically reviewed. Minimal microbiological requirements for publications on disease associations of coryneform bacteria are proposed.
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Affiliation(s)
- G Funke
- Department of Medical Microbiology, University of Zürich, Switzerland.
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