1
|
Huang Z, Yu K, Lan R, Glenn Morris J, Xiao Y, Ye J, Zhang L, Luo L, Gao H, Bai X, Wang D. Vibrio metschnikovii as an emergent pathogen: analyses of phylogeny and O-antigen and identification of possible virulence characteristics. Emerg Microbes Infect 2023; 12:2252522. [PMID: 37616379 PMCID: PMC10484048 DOI: 10.1080/22221751.2023.2252522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 08/21/2023] [Accepted: 08/23/2023] [Indexed: 08/26/2023]
Abstract
Vibrio metschnikovii is an emergent pathogen that causes human infections which may be fatal. However, the phylogenetic characteristics and pathogenicity determinants of V. metschnikovii are poorly understood. Here, the whole-genome features of 103 V. metschnikovii strains isolated from different sources are described. On phylogenetic analysis V. metschnikovii populations could be divided into two major lineages, defined as lineage 1 (L1) and 2 (L2), of which L1 was more likely to be associated with human activity. Meanwhile, we defined 29 V. metschnikovii O-genotypes (VMOg, named VMOg1-VMOg29) by analysis of the O-antigen biosynthesis gene clusters (O-AGCs). Most VMOgs (VMOg1 to VMOg28) were assembled by the Wzx/Wzy pathway, while only VMOg29 used the ABC transporter pathway. Based on the sequence variation of the wzx and wzt genes, an in silico O-genotyping system for V. metschnikovii was developed. Furthermore, nineteen virulence-associated factors involving 161 genes were identified within the V. metschnikovii genomes, including genes encoding motility, adherence, toxins, and secretion systems. In particular, V. metschnikovii was found to promote a high level of cytotoxicity through the synergistic action of the lateral flagella and T6SS. The lateral flagellar-associated flhA gene played an important role in the adhesion and colonization of V. metschnikovii during the early stages of infection. Overall, this study provides an enhanced understanding of the genomic evolution, O-AGCs diversity, and potential pathogenic features of V. metschnikovii.
Collapse
Affiliation(s)
- Zhenzhou Huang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), State Key Laboratory of Infectious Disease Prevention and Control, Beijing, People’s Republic of China
- Center for Human Pathogenic Culture Collection, China CDC, Beijing, People’s Republic of China
- Hangzhou Center for Disease Control and Prevention, Hangzhou, People’s Republic of China
| | - Keyi Yu
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), State Key Laboratory of Infectious Disease Prevention and Control, Beijing, People’s Republic of China
- Center for Human Pathogenic Culture Collection, China CDC, Beijing, People’s Republic of China
| | - Ruiting Lan
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
| | - J. Glenn Morris
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
| | - Yue Xiao
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), State Key Laboratory of Infectious Disease Prevention and Control, Beijing, People’s Republic of China
- Center for Human Pathogenic Culture Collection, China CDC, Beijing, People’s Republic of China
| | - Julian Ye
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, People’s Republic of China
| | - Leyi Zhang
- Wenzhou Center for Disease Control and Prevention, Wenzhou, People’s Republic of China
| | - Longze Luo
- Sichuan Provincial Center for Disease Control and Prevention, Chengdu, People’s Republic of China
| | - He Gao
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), State Key Laboratory of Infectious Disease Prevention and Control, Beijing, People’s Republic of China
- Center for Human Pathogenic Culture Collection, China CDC, Beijing, People’s Republic of China
| | - Xuemei Bai
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), State Key Laboratory of Infectious Disease Prevention and Control, Beijing, People’s Republic of China
- Center for Human Pathogenic Culture Collection, China CDC, Beijing, People’s Republic of China
| | - Duochun Wang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), State Key Laboratory of Infectious Disease Prevention and Control, Beijing, People’s Republic of China
- Center for Human Pathogenic Culture Collection, China CDC, Beijing, People’s Republic of China
| |
Collapse
|
2
|
Gusman VP, Strajin ZR. Vibrio metschnikovii isolated from cosmetic products as potential cause of skin infection. Future Microbiol 2022; 17:485-489. [PMID: 35322706 DOI: 10.2217/fmb-2021-0078] [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: 11/21/2022] Open
Abstract
Cosmetics intended for human use should be free of microbes involving a potential health hazard. Different points in the cosmetic production process, from the choice of raw materials and the formulation itself to the final packaging, can be critical. The aim of this study is to present the first case of Vibrio metschnikovii isolated from cosmetics in Serbia, which caused signs of skin infection. Standard microbiological examination of the cosmetic sample, as well as skin swabs from the skin changes which appeared after applying the same cosmetics, were taken with final identification to the level of species applying matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry. Adequate management of hazard analysis and critical control points in cosmetic production is strongly recommended, which would guarantee microbiological safety of the final product.
Collapse
Affiliation(s)
- Vera P Gusman
- Department of Microbiology, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 3, Novi Sad, 21000, Serbia.,Institute of Public Health of Vojvodina, Futoska 121, Novi Sad, 21000, Serbia
| | - Zoran R Strajin
- Institute of Public Health of Vojvodina, Futoska 121, Novi Sad, 21000, Serbia
| |
Collapse
|
3
|
Håkonsholm F, Lunestad BT, Aguirre Sánchez JR, Martinez‐Urtaza J, Marathe NP, Svanevik CS. Vibrios from the Norwegian marine environment: Characterization of associated antibiotic resistance and virulence genes. Microbiologyopen 2020; 9:e1093. [PMID: 32558371 PMCID: PMC7520990 DOI: 10.1002/mbo3.1093] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 05/20/2020] [Accepted: 05/27/2020] [Indexed: 12/19/2022] Open
Abstract
A total of 116 Vibrio isolates comprising V. alginolyticus (n = 53), V. metschnikovii (n = 38), V. anguillarum (n = 21), V. antiquarius (n = 2), and V. fujianensis (n = 2) were obtained from seawater, fish, or bivalve molluscs from temperate Oceanic and Polar Oceanic area around Norway. Antibiotic sensitivity testing revealed resistance or reduced susceptibility to ampicillin (74%), oxolinic acid (33%), imipenem (21%), aztreonam (19%), and tobramycin (17%). Whole-genome sequence analysis of eighteen drug-resistant isolates revealed the presence of genes like β-lactamases, chloramphenicol-acetyltransferases, and genes conferring tetracycline and quinolone resistance. The strains also carried virulence genes like hlyA, tlh, rtxA to D and aceA, E and F. The genes for cholerae toxin (ctx), thermostable direct hemolysin (tdh), or zonula occludens toxin (zot) were not detected in any of the isolates. The present study shows low prevalence of multidrug resistance and absence of virulence genes of high global concern among environmental vibrios in Norway. However, in the light of climate change, and projected rising sea surface temperatures, even in the cold temperate areas, there is a need for frequent monitoring of resistance and virulence in vibrios to be prepared for future public health challenges.
Collapse
Affiliation(s)
| | | | | | - Jaime Martinez‐Urtaza
- Department of Genetics and MicrobiologyUniversitat Autònoma de Barcelona (UAB)BarcelonaSpain
| | | | | |
Collapse
|
4
|
|
5
|
Jensen J, Jellinge ME. Severe septic shock and cardiac arrest in a patient with Vibrio metschnikovii: a case report. J Med Case Rep 2014; 8:348. [PMID: 25331560 PMCID: PMC4205780 DOI: 10.1186/1752-1947-8-348] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Accepted: 09/01/2014] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION Vibrio metschnikovii is a very rare species and can be fatal to patients with massive comorbidity. Until now only eight other cases have been reported. CASE PRESENTATION This case report describes a 78-year-old Danish man who presented with fever, hypotension and unconsciousness and he developed cardiac arrest. Vibrio metschnikovii was identified in all his blood samples and effective antibiotics were initiated. CONCLUSIONS The human sources are believed to include shrimps, birds, water, sewage and seafood. We report the first case of Vibrio metschnikovii from a Nordic country and the report shows that even though isolation of Vibrio metschnikovii from human clinical samples is very rare, it still infects humans and may be fatal, despite sufficient treatment.
Collapse
Affiliation(s)
| | - Marlene Ersgaard Jellinge
- Department of Anesthesiology, Sydvestjysk Sygehus Esbjerg (Southwest Jutland Hospital), Finsensgade 35, DK-6700 Esbjerg, Denmark.
| |
Collapse
|
6
|
Pariente Martín M, Escribano Garaizábal E, Liria Sánchez PJ, Crespo Sánchez MD. Vibrio metschnikovii from a human infected leg ulcer. Rev Inst Med Trop Sao Paulo 2009; 50:311-2. [PMID: 18949352 DOI: 10.1590/s0036-46652008000500012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023] Open
|
7
|
|
8
|
Matté MH, Baldassi L, Barbosa ML, Malucelli MI, Nitrini SM, Matté GR. Virulence factors of Vibrio metschnikovii strains isolated from fish in Brazil. Food Control 2007. [DOI: 10.1016/j.foodcont.2006.03.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
9
|
Wallet F, Tachon M, Nseir S, Courcol RJ, Roussel-Delvallez M. Vibrio metschnikovii pneumonia. Emerg Infect Dis 2006; 11:1641-2. [PMID: 16355507 PMCID: PMC3366744 DOI: 10.3201/eid1110.050177] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Affiliation(s)
| | | | - Saad Nseir
- Lille University Medical Center, Lille, France
| | | | | |
Collapse
|
10
|
Linde HJ, Kobuch R, Jayasinghe S, Reischl U, Lehn N, Kaulfuss S, Beutin L. Vibrio metschnikovii, a rare cause of wound infection. J Clin Microbiol 2004; 42:4909-11. [PMID: 15472380 PMCID: PMC522296 DOI: 10.1128/jcm.42.10.4909-4911.2004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We report the first case of a postoperative wound infection caused by Vibrio metschnikovii on the lower right leg of a patient after saphenectomy. Compared to the healing of an uninfected site, that of the right leg was delayed, and a cure was achieved by intensified wound care. Several swabs taken from the infected site grew a gram-negative rod in pure culture that was identified as V. metschnikovii by the VITEK 2 system. The source of the infection was not detected; however, the absence of putative risk factors (exposure to water or shellfish or an episode of diarrhea), the profession of the patient (butcher), and the isolation of V. metschnikovii in a variety of farm animals (chicken, cattle, swine, and horses) suggest that infections caused by V. metschnikovii may be regarded as zoonotic.
Collapse
Affiliation(s)
- Hans-Jörg Linde
- Institute for Medical Microbiology and Hygiene, University of Regensburg, Regensburg, Germany.
| | | | | | | | | | | | | |
Collapse
|
11
|
Figueirêdo PMS, Catani CF, Yano T. Thiol-independent activity of a cholesterol-binding enterohemolysin produced by enteropathogenic Escherichia coli. Braz J Med Biol Res 2003; 36:1495-9. [PMID: 14576905 DOI: 10.1590/s0100-879x2003001100008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Enterohemolysin produced by Escherichia coli associated with infant diarrhea showed characteristics similar to those of thiol-activated hemolysins produced by Gram-positive bacteria, including inactivation by cholesterol, lytic activity towards eukaryotic cells and thermoinstability. However, enterohemolysin activity was not inactivated by oxidation or by SH group-blocking agents (1 mM HgCl2, 1 mM iodoacetic acid) and the hemolysin (100 microg/ml) was not lethal to mice, in contrast to the lethality of the thiol-activated hemolysin family to animals. Earlier reports showed that intravenous injection of partially purified streptolysin O preparations (0.2 microg) was rapidly lethal to mice. These results suggest that E. coli enterohemolysin is not a thiol-activated hemolysin, despite its ability to bind cholesterol, probably due to the absence of free thiol-group(s) that characterize the active form of the thiol-activated hemolysin molecule.
Collapse
Affiliation(s)
- P M S Figueirêdo
- Departamento de Microbiologia e Imunologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | | | | |
Collapse
|
12
|
Kothary MH, Delston RB, Curtis SK, McCardell BA, Tall BD. Purification and characterization of a vulnificolysin-like cytolysin produced by Vibrio tubiashii. Appl Environ Microbiol 2001; 67:3707-11. [PMID: 11472951 PMCID: PMC93075 DOI: 10.1128/aem.67.8.3707-3711.2001] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
An extracellular cytolysin from Vibrio tubiashii was purified by sequential hydrophobic interaction chromatography with phenyl-Sepharose CL-4B and gel filtration with Sephacryl S-200. This protein is sensitive to heat and proteases, is inhibited by cholesterol, and has a molecular weight of 59,000 and an isoelectric point of 5.3. In addition to lysing various erythrocytes, it is cytolytic and/or cytotoxic to Chinese hamster ovary cells, Caco-2 cells, and Atlantic menhaden liver cells in tissue culture. Lysis of erythrocytes occurs by a multihit process that is dependent on temperature and pH. Twelve of the first 17 N-terminal amino acid residues (Asp-Asp-Tyr-Val-Pro-Val-Val-Glu-Lys-Val-Tyr-Tyr-Ile-Thr-Ser-Ser-Lys) are identical to those of the Vibrio vulnificus cytolysin.
Collapse
Affiliation(s)
- M H Kothary
- Divisions of Virulence Assessment, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, Washington, DC 20204, USA.
| | | | | | | | | |
Collapse
|
13
|
Edwards L, Hessinger DA. Portuguese Man-of-war (Physalia physalis) venom induces calcium influx into cells by permeabilizing plasma membranes. Toxicon 2000; 38:1015-28. [PMID: 10708794 DOI: 10.1016/s0041-0101(99)00213-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Portuguese Man-of-war (Physalia physalis) nematocyst venom dose-dependently stimulates calcium (45Ca(2+)) influx into L-929, GH(4)C(1), FRL, and embryonic chick heart cells. Venom-induced calcium influx is not blocked by ouabain, vanadate, nor organic calcium channel blockers, but is blocked by transition metal cations, such as lanthanum and zinc. Venom-induced calcium influx is accompanied in a dose-dependent manner by the release of intracellular lactate dehydrogenase, indicating a loss in plasma membrane integrity and cytolysis. Concentrations of zinc that block 45Ca(2+) influx also block lactate dehydrogenase release. Lanthanum, which also blocks 45Ca(2+) uptake, does not neutralize the cytolytic activity of the venom, but rather inhibits the venom's cytolytic action at the level of the target cell plasma membrane. Our findings indicate that Man-of-war venom causes an influx of calcium into several different cells types, not just those of the cardiovascular system, and this influx likely occurs by permeabilizing the plasma membranes of cells.
Collapse
Affiliation(s)
- L Edwards
- Department of Physiology and Pharmacology,School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | | |
Collapse
|
14
|
Zitzer A, Palmer M, Weller U, Wassenaar T, Biermann C, Tranum-Jensen J, Bhakdi S. Mode of primary binding to target membranes and pore formation induced by Vibrio cholerae cytolysin (hemolysin). EUROPEAN JOURNAL OF BIOCHEMISTRY 1997; 247:209-16. [PMID: 9249028 DOI: 10.1111/j.1432-1033.1997.00209.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Vibrio cholerae cytolysin (VCC) is produced by many non-choleratoxigenic strains of V. cholerae, and possibly represents a relevant pathogenicity determinant of these bacteria. The protein is secreted as a pro-toxin that is proteolytically cleaved to yield the active toxin with a molecular mass of approximately 63 kDa. We here describe a simple procedure for preparative isolation of mature VCC from bacterial culture supernatants, and present information on its mode of binding and pore formation in biological membranes. At low concentrations, toxin monomers interact with a high-affinity binding site on highly susceptible rabbit erythrocytes. This as yet unidentified binding site is absent on human erythrocytes, which are less susceptible to the toxin action. At higher concentrations, binding of the toxin occurs to both rabbit and human erythrocytes in a non-saturable manner. Cell-bound toxin monomers oligomerize to form supramolecular structures that are seen in the electron microscope as apparently hollow funnels, and oligomerization correlates functionally with the appearance of small transmembrane pores. Osmotic protection experiments indicate that the toxin channels are of finite size with a diameter of 1-2 nm. The mode of action of VCC closely resembles that of classical pore-forming toxins such as staphylococcal alpha-toxin and the aerolysin of Aeromonas hydrophila.
Collapse
Affiliation(s)
- A Zitzer
- Institute of Medical Microbiology and Hygiene, University of Mainz, Germany
| | | | | | | | | | | | | |
Collapse
|
15
|
Sears CL, Kaper JB. Enteric bacterial toxins: mechanisms of action and linkage to intestinal secretion. Microbiol Rev 1996; 60:167-215. [PMID: 8852900 PMCID: PMC239424 DOI: 10.1128/mr.60.1.167-215.1996] [Citation(s) in RCA: 189] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- C L Sears
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | | |
Collapse
|
16
|
Douet JP, Castroviejo M, Dodin A, Bébéar C. Purification and characterization of Kanagawa haemolysin from Vibrio parahaemolyticus. Res Microbiol 1992; 143:569-77. [PMID: 1475518 DOI: 10.1016/0923-2508(92)90114-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The haemolysin of a Kanagawa-phenomenon-positive Vibrio parahaemolyticus strain was purified to apparent homogeneity by acid precipitation, DEAE-Trisacryl, hydroxyapatite and FPLC (Mono-Q) columns: 1.4 micrograms of protein gave a single band on conventional SDS-PAGE with silver staining. The haemolysin was not inactivated by heating for 10 min at 100 degrees C. It was a monomeric protein with a molecular weight estimated to be 29 kDa by PAGE under denaturing and non-denaturing conditions. The haemolysin caused fluid accumulation in the ligated mouse ileum, was cytolytic against cultured mammalian cells and also lysed erythrocytes of various animal species (equine erythrocytes being the most resistant).
Collapse
Affiliation(s)
- J P Douet
- Université de Bordeaux I, Talence, France
| | | | | | | |
Collapse
|
17
|
Abstract
The gene encoding damselysin, an extracellular cytolysin produced by virulent Vibrio damsela strains, was cloned and expressed in Escherichia coli. DNA sequences homologous to that of the cloned gene were detected in hemolytic strains of V. damsela but not in other hemolytic Vibrio species.
Collapse
Affiliation(s)
- D L Cutter
- Department of Microbiology and Immunology, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, North Carolina 27103
| | | |
Collapse
|
18
|
Suzuki K, Une T, Yamazaki M, Takeda T. Purification and some properties of a hemolysin from the poisonous mushroom Rhodophyllus rhodopolius. Toxicon 1990; 28:1019-28. [PMID: 2260101 DOI: 10.1016/0041-0101(90)90140-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A hemolytic protein which causes diarrhea and death to mice was purified from the fruit bodies of a poisonous mushroom species Rhodophyllus rhodopolius (Fries) by DEAE-cellulose column chromatography, ammonium sulfate precipitation, gel filtration on Sephadex G-200, and DEAE-Sephadex A-25 column chromatography. The mol. wt of the purified hemolysin was estimated to be 40,000 by SDS-polyacrylamide slab gel electrophoresis. The hemolytic activity of the purified hemolysin was destroyed by heating at 60 degrees C for 10 min, and partially reduced by pepsin, papain and 2-mercaptoethanol. Cholesterol and phosphatidylcholine did not inhibit the activity. The hemolysin was unstable below pH 7.0 but stable at pH 8.0. The optimal pH for hemolysis was 6.0. Hemolysis did not occur below 4 degrees C even though the hemolysin bound to the erythrocyte. Mouse, chicken, rat, horse and human erythrocytes were sensitive in this order, but sheep and cow erythrocytes were not lysed by the toxin.
Collapse
Affiliation(s)
- K Suzuki
- Faculty of Pharmaceutical Sciences, Chiba University, Japan
| | | | | | | |
Collapse
|
19
|
West PA. The human pathogenic vibrios--a public health update with environmental perspectives. Epidemiol Infect 1989; 103:1-34. [PMID: 2673820 PMCID: PMC2249492 DOI: 10.1017/s0950268800030326] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Pathogenic Vibrio species are naturally-occurring bacteria in freshwater and saline aquatic environments. Counts of free-living bacteria in water are generally less than required to induce disease. Increases in number of organisms towards an infective dose can occur as water temperatures rise seasonally followed by growth and concentration of bacteria on higher animals, such as chitinous plankton, or accumulation by shellfish and seafood. Pathogenic Vibrio species must elaborate a series of virulence factors to elicit disease in humans. Activities which predispose diarrhoeal and extraintestinal infections include ingestion of seafood and shellfish and occupational or recreational exposure to natural aquatic environments, especially those above 20 degrees C. Travel to areas endemic for diseases due to pathogenic Vibrio species may be associated with infections. Host risk factors strongly associated with infections are lack of gastric acid and liver disorders. Involvement of pathogenic Vibrio species in cases of diarrhoea should be suspected especially if infection is associated with ingestion of seafood or shellfish, raw or undercooked, in the previous 72 h. Vibrio species should be suspected in any acute infection associated with wounds sustained or exposed in the marine or estuarine environment. Laboratories serving coastal areas where infection due to pathogenic Vibrio species are most likely to occur should consider routine use of TCBS agar and other detection regimens for culture of Vibrio species from faeces, blood and samples from wound and ear infections.
Collapse
Affiliation(s)
- P A West
- North West Water Authority, Warrington, United Kingdom
| |
Collapse
|
20
|
Miyake M, Honda T, Miwatani T. Effects of divalent cations and saccharides on Vibrio metschnikovii cytolysin-induced hemolysis of rabbit erythrocytes. Infect Immun 1989; 57:158-63. [PMID: 2909485 PMCID: PMC313060 DOI: 10.1128/iai.57.1.158-163.1989] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Divalent cations and polysaccharides such as inulin and dextran reversibly inhibited hemolysis of rabbit erythrocytes caused by Vibrio metschnikovii cytolysin. On the basis of the 50% inhibitory doses, the cations were divided into two groups, group I (Cd2+, Cu2+, Ni2+, Sn2+, and Zn2+) and group II (Ba2+, Ca2+, Co2+, Mg2+, Mn2+, and Sr2+). Neither divalent cations nor polysaccharides interfered with the binding of toxins to the erythrocyte membrane. Group I cations disturbed tetramer formation of cytolysin on the cytolysin-lysed erythrocyte membrane, although group II cations and dextran did not affect the process. Erythrocytes treated with cytolysin in the presence of group II cations or dextran lysed after transfer to toxin- and inhibitor (group II cations or dextran)-free buffer at both 37 and 4 degrees C. However, erythrocytes treated in the presence of group I cations lysed at 37 degrees C but not at 4 degrees C, indicating that group I cations block the temperature-dependent lesion (tetramer)-forming step subsequent to the binding of cytolysin to the erythrocytes. The cytolysin-treated erythrocytes swelled in a colloid osmotic manner, and the swelling was preceded by the binding and the lesion-forming steps. It is also suggested that the lysis of the erythrocytes proceeds in a temperature-independent manner and that the cytolysin does not bind to the erythrocytes at 4 degrees C. These findings suggest that the sequence of V. metschnikovii cytolysin-induced hemolysis is defined by three steps: (i) a temperature-dependent binding step, (ii) a temperature-dependent lesion-forming step, and (iii) a temperature-independent lysis step.
Collapse
Affiliation(s)
- M Miyake
- Department of Bacteriology and Serology, Osaka University, Japan
| | | | | |
Collapse
|