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Wang SX, Park M, Summage-West CV, Reyna M, Kim SG. Genome sequence of Clostridium septicum strain WW106, isolated from influent wastewater at a research center with multiple-species research animal facilities. Microbiol Resour Announc 2024; 13:e0076823. [PMID: 38063434 DOI: 10.1128/mra.00768-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 10/27/2023] [Indexed: 01/18/2024] Open
Abstract
Clostridium septicum is an anaerobic Gram-positive rod-shaped bacterial pathogen known as a lethal causative agent of progressive gas gangrene in animals and humans. We report the 3.43-Mbp genome sequence of C. septicum strain WW106, isolated from influent wastewater at a research center with multiple-species laboratory animal facilities.
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Affiliation(s)
- Sharon X Wang
- Surveillance/Diagnostic Laboratory, Office of Scientific Coordination, National Center for Toxicological Research, U.S. Food and Drug Administration , Jefferson, Arkansas, USA
| | - Miseon Park
- Division of Microbiology, National Center for Toxicological Research, U.S. Food and Drug Administration , Jefferson, Arkansas, USA
| | - Christine V Summage-West
- Surveillance/Diagnostic Laboratory, Office of Scientific Coordination, National Center for Toxicological Research, U.S. Food and Drug Administration , Jefferson, Arkansas, USA
| | - Mariela Reyna
- Surveillance/Diagnostic Laboratory, Office of Scientific Coordination, National Center for Toxicological Research, U.S. Food and Drug Administration , Jefferson, Arkansas, USA
| | - Sung Guk Kim
- Surveillance/Diagnostic Laboratory, Office of Scientific Coordination, National Center for Toxicological Research, U.S. Food and Drug Administration , Jefferson, Arkansas, USA
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2
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Dorso L, Chartier C, Popoff MR, Tesson C, Despres J, Uzal FA. Postpartum clostridial gangrenous metritis in 12 dairy goats in France. J Vet Diagn Invest 2023; 35:266-271. [PMID: 36912442 DOI: 10.1177/10406387231161508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023] Open
Abstract
Clostridial infections in goats have been associated frequently with enteric diseases or gas gangrene but very rarely with the reproductive system. We describe here 12 cases of fatal postpartum gangrenous metritis in does associated with infection by several clostridial species. Clinically, these cases were characterized by rapid onset of hyperthermia followed by death after kidding. On postmortem examination, the uteri appeared to be necrotic and were hemorrhagic and edematous. Microscopically, the uteri had diffuse coagulative necrosis, edema, hemorrhage, and fibrinous thrombi with intralesional gram-positive rods. Clostridium perfringens was isolated from 7 of 9 uterine samples cultured, and C. perfringens, C. septicum, C. novyi, or C. chauvoei were demonstrated by immunohistochemistry (IHC) in the 5 cases examined. IHC for Paeniclostridium sordellii was negative in all 5 cases. PCR performed on 3 of the C. perfringens isolates was positive for alpha toxin and perfringolysin, identifying these isolates as type A. Clostridial infection should be considered in cases of postpartum gangrenous metritis of does.
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Affiliation(s)
- Laëtitia Dorso
- Oniris, INRAE (National Research Institute for Agriculture, Food and the Environment), BIOEPAR (Biology, Epidemiology and Risk Analysis in Animal Health), Nantes, France.,Oniris, CHUV (University Veterinary Hospital), Nantes, France
| | - Christophe Chartier
- Oniris, INRAE (National Research Institute for Agriculture, Food and the Environment), BIOEPAR (Biology, Epidemiology and Risk Analysis in Animal Health), Nantes, France
| | | | | | | | - Francisco A Uzal
- California Animal Health and Food Safety Laboratory System, San Bernardino Laboratory, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA
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Karagulle B, Celik F, Simsek S, Ahmed H, Shen Y, Cao J. First molecular evidence of Clostridium perfringens in adult Fasciola spp. isolates in cattle hosts. Front Vet Sci 2022; 9:967045. [PMID: 36118337 PMCID: PMC9478789 DOI: 10.3389/fvets.2022.967045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 08/12/2022] [Indexed: 11/18/2022] Open
Abstract
Fasciolosis is a parasitic disease caused by Fasciola spp. It is a prevalent helminth infection globally. Clostridial hepatitis is a general name refer to disorders caused by a few clostridial agents that most severely affect the liver. Migration of young parasite forms (mostly Fasciola hepatica) in the parenchymal tissue of the liver causes necrosis and anaerobic environment, stimulating the proliferation of C. novyi type B spores. This study investigated the occurrence of Clostridium spp in adult Fasciola spp isolates. Isolates (n = 100) were collected from the bile ducts of infected cattle after slaughter. Total genomic DNA was extracted from each sample. A multiplex-PCR based on the flagellin C (fliC) gene was used for quick identification of C. chauvoei, C. haemolyticum, C. novyi types A and B, and C. septicum. In addition, a pair of primers Cpa (F) and Cpa (R) were used for detection of the C. perfringens alpha toxin gene. The products were sequenced. No band was obtained after multiplex-PCR of the fliC gene. A 247 bp band was detected in two isolates using the Cpa primers. BLAST analysis of these two isolates characterized both as C. perfringens alpha toxin. This is the first description of the molecular detection of C. perfringens in flukes. Further studies are needed to investigate whether Clostridum species is also carried by other developmental forms (egg and larval stages) of Fasciola spp.
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Affiliation(s)
- Burcu Karagulle
- Department of Microbiology, Faculty of Veterinary Medicine, University of Firat, Elazig, Turkey
| | - Figen Celik
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, Elazig, Turkey
| | - Sami Simsek
- Department of Parasitology, Faculty of Veterinary Medicine, University of Firat, Elazig, Turkey
- *Correspondence: Sami Simsek
| | - Haroon Ahmed
- Department of Biosciences, COMSATS University Islamabad (CUI), Islamabad, Pakistan
| | - Yujuan Shen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, China
- Chinese Center for Tropical Diseases Research, Shanghai, China
- Key Laboratory of Parasite and Vector Biology, National Health Commission of the People's Republic of China, Shanghai, China
- WHO Collaborating Center for Tropical Diseases, Shanghai, China
- The School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jianping Cao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, China
- Chinese Center for Tropical Diseases Research, Shanghai, China
- Key Laboratory of Parasite and Vector Biology, National Health Commission of the People's Republic of China, Shanghai, China
- WHO Collaborating Center for Tropical Diseases, Shanghai, China
- The School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Jianping Cao
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Alberca GGF, Cardoso NSS, Solis-Castro RL, Nakano V, Alberca RW. Intestinal inflammation and the microbiota: Beyond diversity. World J Gastroenterol 2022; 28:3274-3278. [PMID: 36051343 PMCID: PMC9331525 DOI: 10.3748/wjg.v28.i26.3274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/05/2021] [Accepted: 06/26/2022] [Indexed: 02/06/2023] Open
Abstract
The recent manuscript entitled “Relationship between clinical features and intestinal microbiota in Chinese patients with ulcerative colitis” reported a difference in the intestinal microbiota of patients with ulcerative colitis according to the severity of the colitis. The influence of the intestinal microbiota on the development and progress of gastrointestinal disorders is well established. Besides the diversity in the microbiome, the presence of virulence factors and toxins by commensal bacteria may affect an extensive variety of cellular processes, contributing to the induction of a proinflammatory environment.
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Affiliation(s)
- Gabriela Gama Freire Alberca
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Naiane Samira Souza Cardoso
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Rosa Liliana Solis-Castro
- Departamento Académico de Biología Bioquímica, Facultad de Ciencias de la Salud, Universidad Nacional de Tumbes, Pampa Grande 24000, Tumbes, Peru
| | - Viviane Nakano
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Ricardo Wesley Alberca
- Laboratorio de Dermatologia e Imunodeficiencias, Departamento de Dermatologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo 01246-903, Brazil
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Abstract
Clostridium perfringens, a prevalent Gram-positive bacterium, causes necrotic diseases associated with abundant life loss and economic burdens of billions of USD. The mechanism of C. perfringens-induced necrotic diseases remains largely unknown, in part, because of the lack of effective animal models and the presence of a large array of exotoxins and diverse disease manifestations from the skin and deep tissues to the gastrointestinal tract. In the light of the advancement of medical and veterinary research, a large body of knowledge is accumulating on the factors influencing C. perfringens-induced necrotic disease onset, development, and outcomes. Here, we present an overview of the key virulence factors of C. perfringens exotoxins. Subsequently, we focus on comprehensively reviewing C. perfringens-induced necrotic diseases such as myonecrosis, acute watery diarrhea, enteritis necroticans, preterm infant necrotizing enterocolitis, and chicken necrotic enteritis. We then review the current understanding on the mechanisms of myonecrosis and enteritis in relation to the immune system and intestinal microbiome. Based on these discussions, we then review current preventions and treatments of the necrotic diseases and propose potential new intervention options. The purpose of this review is to provide an updated and comprehensive knowledge on the role of the host–microbe interaction to develop new interventions against C. perfringens-induced necrotic diseases.
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Sprohnle-Barrera CH, Gibson JS, Price R, Graham RM, Jennison AV, Ricca MR, Allavena RE. Fatal non-traumatic gas gangrene caused by Clostridium perfringens type A in a Siberian Husky dog. J Vet Diagn Invest 2022; 34:518-522. [PMID: 35179099 PMCID: PMC9254053 DOI: 10.1177/10406387221079066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An 8-y-old, castrated male Siberian Husky dog was admitted to an emergency clinic with acute collapse and severe swelling of both forelimbs, ventral thorax, and axillary region. The clinical assessment, with laboratory tests and radiologic investigation, confirmed severe subcutaneous emphysema and multi-organ failure. The animal died while receiving emergency treatment. On postmortem examination, Clostridium perfringens was isolated from the subcutaneous fluid and the effusion from the thoracic and abdominal cavities. Relevant histopathology findings included subcutaneous emphysema and multi-organ perivascular and intravascular, intralesional myriad 0.5-3-µm gram-positive rod bacteria, with no associated inflammation. Whole-genome sequencing and phylogenetic analysis identified C. perfringens type A. Virulence genes detected included cpa (alpha toxin), cadA (v-toxin), colA (collagenase A), nagH (hyaluronidase), nanH, nanI, nanJ (sialidases), and pfoa (perfringolysin). These virulence genes have previously been reported to act synergistically with alpha toxin in C. perfringens-mediated gas gangrene.
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Affiliation(s)
- Cleide H. Sprohnle-Barrera
- School of Veterinary Science, University of Queensland, Gatton, QLD, Australia (Sprohnle-Barrera, Gibson, Price, Allavena)
| | - Justine S. Gibson
- School of Veterinary Science, University of Queensland, Gatton, QLD, Australia (Sprohnle-Barrera, Gibson, Price, Allavena)
| | - Rochelle Price
- School of Veterinary Science, University of Queensland, Gatton, QLD, Australia (Sprohnle-Barrera, Gibson, Price, Allavena)
| | - Rikki M. Graham
- Public Health Microbiology, Queensland Reference Centre for Microbial and Public Health Genomics (MPHG), Forensic and Scientific Services, Health Support Queensland, Queensland Health, Brisbane, QLD, Australia (Graham, Jennison)
| | - Amy V. Jennison
- Public Health Microbiology, Queensland Reference Centre for Microbial and Public Health Genomics (MPHG), Forensic and Scientific Services, Health Support Queensland, Queensland Health, Brisbane, QLD, Australia (Graham, Jennison)
| | | | - Rachel E. Allavena
- Rachel E. Allavena, School of Veterinary Science, The University of Queensland, Gatton, QLD 4343, Australia.
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Kong L, Wang Y, Ji H, Li Z, Sun Y, Liu Y, Cao S, Zhao J, Shi L, Jin Y. A Case of Forearm Soft Tissue Infection Caused by Hypervirulent K. pneumoniae in an Otherwise Healthy 24-Year-Old Woman. Infect Drug Resist 2022; 15:63-68. [PMID: 35046671 PMCID: PMC8760979 DOI: 10.2147/idr.s342019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 12/10/2021] [Indexed: 11/23/2022] Open
Abstract
In recent years, hypervirulent Klebsiella pneumoniae (hvKp) has received greater attention. It mainly infects diabetic patients and typically causes a hepatic abscess. Here, we report a case of hvKp that caused forearm muscle and soft tissue infection in addition to bacteremia, hepatic and pulmonary abscess, and hyperglycemia. The patient’s condition stabilized after comprehensive treatment. She eventually recovered and was discharged after several debridement and flap operations. At 9 months of follow-up, no signs of infectious recurrence were noted, and the hyperglycemia resolved. Here, we detail important clinical features of a severe hvKp case diagnosed in an otherwise healthy individual. This report underscores the potential of hvKp to cause deep tissue infection and present with clinical symptoms similar to gas gangrene. Symptom onset in the setting of hvKp infection is usually gradual and misdiagnosis is common. The diagnosis of hvKp should be routinely considered in the clinical setting, and be strongly suspected when presenting with characteristic epidemiological, clinical and laboratory features. Although diabetes is a predisposing factor to hvKp infection, hyperglycemia appeared to manifest as a consequence of hvKp infection in this patient.
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Affiliation(s)
- Lingwei Kong
- Department of Orthopedics, The Affiliated Hospital of Chengde Medical College, Chengde, Hebei, 067000, People’s Republic of China
| | - Yu Wang
- Department of Orthopedics, The Affiliated Hospital of Chengde Medical College, Chengde, Hebei, 067000, People’s Republic of China
| | - Hairu Ji
- Pathology Teaching and Research Section, Chengde Medical College, Chengde, Hebei, 067000, People’s Republic of China
| | - Zhehong Li
- Department of Orthopedics, The Affiliated Hospital of Chengde Medical College, Chengde, Hebei, 067000, People’s Republic of China
| | - Yupeng Sun
- Department of Orthopedics, The Affiliated Hospital of Chengde Medical College, Chengde, Hebei, 067000, People’s Republic of China
| | - Yanchao Liu
- Department of Orthopedics, The Affiliated Hospital of Chengde Medical College, Chengde, Hebei, 067000, People’s Republic of China
| | - Sheng Cao
- Department of Orthopedics, The Affiliated Hospital of Chengde Medical College, Chengde, Hebei, 067000, People’s Republic of China
| | - Jingxin Zhao
- Department of Orthopedics, The Affiliated Hospital of Chengde Medical College, Chengde, Hebei, 067000, People’s Republic of China
| | - Litao Shi
- Department of Orthopedics, The Affiliated Hospital of Chengde Medical College, Chengde, Hebei, 067000, People’s Republic of China
| | - Yu Jin
- Department of Orthopedics, The Affiliated Hospital of Chengde Medical College, Chengde, Hebei, 067000, People’s Republic of China
- Correspondence: Yu Jin Tel +86 13832428328 Email
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Thomas P, Abdel-Glil MY, Subbaiyan A, Busch A, Eichhorn I, Wieler LH, Neubauer H, Pletz M, Seyboldt C. First Comparative Analysis of Clostridium septicum Genomes Provides Insights Into the Taxonomy, Species Genetic Diversity, and Virulence Related to Gas Gangrene. Front Microbiol 2021; 12:771945. [PMID: 34956133 PMCID: PMC8696124 DOI: 10.3389/fmicb.2021.771945] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/16/2021] [Indexed: 11/13/2022] Open
Abstract
Clostridium septicum is a Gram-positive, toxin-producing, and spore-forming bacterium that is recognized, together with C. perfringens, as the most important etiologic agent of progressive gas gangrene. Clostridium septicum infections are almost always fatal in humans and animals. Despite its clinical and agricultural relevance, there is currently limited knowledge of the diversity and genome structure of C. septicum. This study presents the complete genome sequence of C. septicum DSM 7534T type strain as well as the first comparative analysis of five C. septicum genomes. The taxonomy of C. septicum, as revealed by 16S rRNA analysis as well as by genomic wide indices such as protein-based phylogeny, average nucleotide identity, and digital DNA–DNA hybridization indicates a stable clade. The composition and presence of prophages, CRISPR elements and accessory genetic material was variable in the investigated genomes. This is in contrast to the limited genetic variability described for the phylogenetically and phenotypically related species Clostridium chauvoei. The restriction-modification (RM) systems between two C. septicum genomes were heterogeneous for the RM types they encoded. C. septicum has an open pangenome with 2,311 genes representing the core genes and 1,429 accessory genes. The core genome SNP divergence between genome pairs varied up to 4,886 pairwise SNPs. A vast arsenal of potential virulence genes was detected in the genomes studied. Sequence analysis of these genes revealed that sialidase, hemolysin, and collagenase genes are conserved compared to the α-toxin and hyaluronidase genes. In addition, a conserved gene found in all C. septicum genomes was predicted to encode a leucocidin homolog (beta-channel forming cytolysin) similar (71.10% protein identity) to Clostridium chauvoei toxin A (CctA), which is a potent toxin. In conclusion, our results provide first, valuable insights into strain relatedness and genomic plasticity of C. septicum and contribute to our understanding of the virulence mechanisms of this important human and animal pathogen.
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Affiliation(s)
- Prasad Thomas
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, Jena, Germany
- Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - Mostafa Y. Abdel-Glil
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, Jena, Germany
- Institute for Infectious Diseases and Infection Control, Jena University Hospital – Friedrich Schiller University, Jena, Germany
- Department of Pathology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
- *Correspondence: Mostafa Y. Abdel-Glil,
| | - Anbazhagan Subbaiyan
- Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Izatnagar, India
| | - Anne Busch
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital Jena, Jena, Germany
| | - Inga Eichhorn
- Department of Veterinary Medicine, Institute of Microbiology and Epizootics, Freie Universität Berlin, Berlin, Germany
| | - Lothar H. Wieler
- Department of Veterinary Medicine, Institute of Microbiology and Epizootics, Freie Universität Berlin, Berlin, Germany
- Robert Koch Institute, Berlin, Germany
| | - Heinrich Neubauer
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, Jena, Germany
| | - Mathias Pletz
- Institute for Infectious Diseases and Infection Control, Jena University Hospital – Friedrich Schiller University, Jena, Germany
| | - Christian Seyboldt
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, Jena, Germany
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Uzal FA, Arroyo LG, Navarro MA, Gomez DE, Asín J, Henderson E. Bacterial and viral enterocolitis in horses: a review. J Vet Diagn Invest 2021; 34:354-375. [PMID: 34763560 DOI: 10.1177/10406387211057469] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Enteritis, colitis, and enterocolitis are considered some of the most common causes of disease and death in horses. Determining the etiology of these conditions is challenging, among other reasons because different causes produce similar clinical signs and lesions, and also because some agents of colitis can be present in the intestine of normal animals. We review here the main bacterial and viral causes of enterocolitis of horses, including Salmonella spp., Clostridium perfringens type A NetF-positive, C. perfringens type C, Clostridioides difficile, Clostridium piliforme, Paeniclostridium sordellii, other clostridia, Rhodococcus equi, Neorickettsia risticii, Lawsonia intracellularis, equine rotavirus, and equine coronavirus. Diarrhea and colic are the hallmark clinical signs of colitis and enterocolitis, and the majority of these conditions are characterized by necrotizing changes in the mucosa of the small intestine, colon, cecum, or in a combination of these organs. The presumptive diagnosis is based on clinical, gross, and microscopic findings, and confirmed by detection of some of the agents and/or their toxins in the intestinal content or feces.
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Affiliation(s)
- Francisco A Uzal
- California Animal Health and Food Safety Laboratory, University of California-Davis, San Bernardino Laboratory, USA
| | - Luis G Arroyo
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Mauricio A Navarro
- California Animal Health and Food Safety Laboratory, University of California-Davis, San Bernardino Laboratory, USA.,Instituto de Patología Animal, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Diego E Gomez
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Javier Asín
- California Animal Health and Food Safety Laboratory, University of California-Davis, San Bernardino Laboratory, USA
| | - Eileen Henderson
- California Animal Health and Food Safety Laboratory, University of California-Davis, San Bernardino Laboratory, USA
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Alves MLF, Ferreira MRA, Donassolo RA, Rodrigues RR, Conceição FR. Clostridium septicum: A review in the light of alpha-toxin and development of vaccines. Vaccine 2021; 39:4949-4956. [PMID: 34312008 DOI: 10.1016/j.vaccine.2021.07.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/31/2021] [Accepted: 07/08/2021] [Indexed: 10/20/2022]
Abstract
Clostridium septicum (CS) is a pathogen that can cause the death of animals in livestock worldwide through its main virulence factor, alpha-toxin (ATX). The aspects involved in diseases caused by ATX, such as economic impact, prevalence, and rapid clinical course, require that animals should be systematically immunized. This review provides an overview of CS in livestock farming and discusses current immunization methods. Currently, commercial vaccines available against CS involve the cultivation and inactivation of microorganisms and toxins using a time-consuming, expensive, and high biological risk-carrying production platform, and some have been reported to be ineffective. An alternative to this process is the recombinant DNA technology, although recombinant ATX obtained thus far is no longer efficient in stimulating protective antibody titers despite improvements in the production methods. On the other hand, immunized animals have highly favorable levels of survival when subjected to challenge tests, suggesting that high titers of circulating serum antibodies may not be representative of protection after immunization and that the non-immune cellular defenses associated with the particularities of the mechanism of action of ATX may be involved in the immune response of the host. To contribute to the future of global livestock farming through the development of more efficient recombinant vaccines, we suggest novel perspectives and strategies, such as the location of immunodominant epitopes, expression of relevant functional domains, and construction of chimeras, in the rational design of recombinant ATX.
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Affiliation(s)
- Mariliana Luiza Ferreira Alves
- Instituto Federal Sul-rio-grandense - IFSUL, Praça Vinte de Setembro, 455, Centro, CEP 96.015-360, Pelotas, RS, Brazil; Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, CP 354, CEP 96160-000, Pelotas, RS, Brazil.
| | - Marcos Roberto Alves Ferreira
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, CP 354, CEP 96160-000, Pelotas, RS, Brazil
| | - Rafael Amaral Donassolo
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, CP 354, CEP 96160-000, Pelotas, RS, Brazil
| | - Rafael Rodrigues Rodrigues
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, CP 354, CEP 96160-000, Pelotas, RS, Brazil
| | - Fabricio Rochedo Conceição
- Centro de Desenvolvimento Tecnológico, Núcleo de Biotecnologia, Universidade Federal de Pelotas, CP 354, CEP 96160-000, Pelotas, RS, Brazil
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11
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Ahmed Khan R, van Vuuren SF. Essential oil combinations against Clostridium perfringens and Clostridium septicum - the causative agents of gas gangrene. J Appl Microbiol 2021; 131:1177-1192. [PMID: 33555103 DOI: 10.1111/jam.15029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/25/2021] [Accepted: 02/03/2021] [Indexed: 01/22/2023]
Abstract
AIMS The inhibitory and bactericidal effect of a wide range of essential oils, and their selected combinations against two pathogens (Clostridium perfringens and Clostridium septicum), the causative pathogens of gas gangrenous infections were investigated. Fractional inhibitory indices were also calculated to determine the interactions. METHODS AND RESULTS The Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) assays were used to determine the efficacy of the essential oils. Santalum austrocaledonicum demonstrated the highest activity inhibiting both Clostridial pathogens at the lowest concentration of 0·02 mg ml-1 . Santalum austrocaledonicum combined with Cymbopogon martinii had the strongest inhibition against C. perfringens (MIC 0·02 mg ml-1 ) and C. septicum (MIC 0·01 mg ml-1 ). Selected combinations demonstrated synergy (ΣFIC ≤ 0·50) in combination against both pathogens tested. Antagonism was also observed in many combinations. CONCLUSIONS Selected essential oils, when studied either individually or in combination, have high inhibitory and bactericidal effects against both Clostridial strains. Nine combinations have proven to be synergistic with 23 combinations additive; 96 indifferent and 77 having an antagonistic effect against the pathogenic strains. Some combinations demonstrated extreme antagonism and as such, careful consideration needs to be given to essential oil selection against these pathogens. SIGNIFICANT IMPACT OF THE STUDY Very few essential oils have been antimicrobially screened (MIC and MBC) against Clostridial strains and furthermore, the efficacies in combination are not known.
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Affiliation(s)
- R Ahmed Khan
- Department of Pharmacy and Pharmacology, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa
| | - S F van Vuuren
- Department of Pharmacy and Pharmacology, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa
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Battiato P, Fernandez Y, Salgüero R, Novellas R, Espada Y, Biller D, Anselmi C. Spontaneous emphysematous splenitis: Radiographic and ultrasonographic findings in three Golden Retriever dogs. Vet Radiol Ultrasound 2020; 62:309-315. [PMID: 33325583 DOI: 10.1111/vru.12941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 11/11/2020] [Accepted: 11/11/2020] [Indexed: 01/04/2023] Open
Abstract
Spontaneous emphysematous splenitis is a life-threatening condition reported rarely in humans; however, published reports in dogs are currently lacking. The aim of this multicentric, retrospective, case series design study was to describe radiographic and ultrasonographic imaging findings in Golden Retriever dogs diagnosed with spontaneous emphysematous splenitis. A total of three dogs were sampled. All dogs had a history of lethargy, diarrhea, and weight loss. Radiographic findings in all dogs included a mass effect with focal or multifocal coalescing "vesicular-like" gas pattern in the splenic region and focal loss of serosal detail. Ultrasonographic findings in all dogs included focal or multifocal irregularly shaped, hypoechoic areas containing a mixture of hyperechoic fluid and gas within the splenic parenchyma, hyperechoic abdominal free fluid, and generalized hyperechoic mesenteric fat without evidence of splenic torsion. Pneumoperitoneum was detected ultrasonographically and radiographically in two dogs. All three dogs underwent splenectomy and splenic torsion was definitively ruled out at surgery. One dog died three days after surgery, whereas the other two dogs recovered uneventfully. Culture of the splenic tissue and free abdominal fluid was positive for Clostridium spp. in all three cases. Findings supported inclusion of spontaneous emphysematous splenitis and septic peritonitis as differential diagnoses for dogs with this combination of clinical and imaging characteristics.
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Affiliation(s)
| | | | | | - Rosa Novellas
- Departament de Medicina i Cirurgia Animals, and Hospital Clínic Veterinari, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Yvonne Espada
- Departament de Medicina i Cirurgia Animals, and Hospital Clínic Veterinari, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - David Biller
- Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Kansas, Manhattan
| | - Carlo Anselmi
- Diagnostic Imaging Department, Pride Veterinary Centre, Derby, UK
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Hopper CP, De La Cruz LK, Lyles KV, Wareham LK, Gilbert JA, Eichenbaum Z, Magierowski M, Poole RK, Wollborn J, Wang B. Role of Carbon Monoxide in Host-Gut Microbiome Communication. Chem Rev 2020; 120:13273-13311. [PMID: 33089988 DOI: 10.1021/acs.chemrev.0c00586] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Nature is full of examples of symbiotic relationships. The critical symbiotic relation between host and mutualistic bacteria is attracting increasing attention to the degree that the gut microbiome is proposed by some as a new organ system. The microbiome exerts its systemic effect through a diverse range of metabolites, which include gaseous molecules such as H2, CO2, NH3, CH4, NO, H2S, and CO. In turn, the human host can influence the microbiome through these gaseous molecules as well in a reciprocal manner. Among these gaseous molecules, NO, H2S, and CO occupy a special place because of their widely known physiological functions in the host and their overlap and similarity in both targets and functions. The roles that NO and H2S play have been extensively examined by others. Herein, the roles of CO in host-gut microbiome communication are examined through a discussion of (1) host production and function of CO, (2) available CO donors as research tools, (3) CO production from diet and bacterial sources, (4) effect of CO on bacteria including CO sensing, and (5) gut microbiome production of CO. There is a large amount of literature suggesting the "messenger" role of CO in host-gut microbiome communication. However, much more work is needed to begin achieving a systematic understanding of this issue.
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Affiliation(s)
- Christopher P Hopper
- Institute for Experimental Biomedicine, University Hospital Wuerzburg, Wuerzburg, Bavaria DE 97080, Germany.,Department of Medicinal Chemistry, College of Pharmacy, The University of Florida, Gainesville, Florida 32611, United States
| | - Ladie Kimberly De La Cruz
- Department of Chemistry & Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Kristin V Lyles
- Department of Biology, Georgia State University, Atlanta, Georgia 30303, United States
| | - Lauren K Wareham
- The Vanderbilt Eye Institute and Department of Ophthalmology & Visual Sciences, The Vanderbilt University Medical Center and School of Medicine, Nashville, Tennessee 37232, United States
| | - Jack A Gilbert
- Department of Pediatrics, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
| | - Zehava Eichenbaum
- Department of Biology, Georgia State University, Atlanta, Georgia 30303, United States
| | - Marcin Magierowski
- Cellular Engineering and Isotope Diagnostics Laboratory, Department of Physiology, Jagiellonian University Medical College, Cracow PL 31-531, Poland
| | - Robert K Poole
- Department of Molecular Biology and Biotechnology, The University of Sheffield, Firth Court, Sheffield S10 2TN, U.K
| | - Jakob Wollborn
- Department of Anesthesiology and Critical Care, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg DE 79085, Germany.,Department of Anesthesiology, Perioperative and Pain Management, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Binghe Wang
- Department of Chemistry & Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
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