Vibrio is a genus of Gram-negative bacteria, possessing a curved-rod shape (comma shape), several species of which can cause foodborne infection, usually associated with eating undercooked seafood. Typically found in salt water, Vibrio species are facultative anaerobes that test positive for oxidase and do not form spores. All members of . the genus are motile and . have polar flagella with sheaths. Vibrio species typically possess two chromosomes, which is unusual for bacteria. Each chromosome has a distinct and independent origin of replication, and are conserved together over ti me in the genus. Recent phylogenies have been constructed based on a suite of genes (multilocus sequence analysis).
O. F. Müller (1773, 1786) described eight species of the g enus Vibrio (inc luded in Infusoria), three of which were spirilliforms. Some of the other species are today assigned to eukaryote tax . a, e.g., to the euglenoid Peranema or to the diatom Bacillaria. However, Vibrio Müller, 1773 became regarded as the name of . a zoological . genus, an d the name of the bacterial genus became Vibrio Pacini, 1854. Filippo Pacini isolated micro-organisms he ca lled "vibrions" from cholera p atients in 185 4 , because of their mo tility. See Vibrion.
Several species of Vibrio are pathogens. Most disease-causing strains are associated with gastroenteritis, but can also infect open wounds and cause septicemia. They can be carried by numerous marine animals, such as crabs or prawns, and have been known to cause fatal infections in humans during exposure. Pathogenic Vibrio species include V. cholerae (the causative agent of cholera), V. parahaemolyticus, and V. vulnificus. V. cholerae is generally transmitted by contaminated water. Pathogenic Vibrio species can cause foodborne illness (infection), usually associated with eating undercooked seafood. The pathogenic features can be linked to quorum sensing where bacteria are able to express their virulence factor via their signalling molecules.
V. vulnificus outbreaks commonly occur in warm climates and small, generally lethal, outbreaks occur regularly. An outbreak occurred in New Orleans after Hurricane Katrina, and several lethal cases occur most years in Florida. As of 2013 in the United States, Vibrio infections as a whole were up 43% when compared with the rates observed in 2006–2008. V. vulnificus, the most severe strain, has not increased. Foodborne Vibrio infections are most often associated with eating raw shellfish.
V. parahaemolyticus is also associated with the Kanagawa phenomenon, in which strains isolated from human hosts (clinical isolates) are hemolytic on blood agar plates, while those isolated from nonhuman sources are not hemolytic.
Many Vibrio species are also zoonotic. They cause disease in fish and shellfish, and are common causes of mortality among domestic marine life.
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Medical care depends on the clinical presentation and the presence of underlying medical conditions.
Because Vibrio gastroenteritis is self-limited in most patients, no specific medical therapy is required. Patients who cannot tolerate oral fluid replacement may require intravenous fluid therapy.
Although most Vibrio species are sensitive to antibiotics such as doxycycline or quinolones, antibiotic therapy does not shorten the course of the illness or the duration of pathogen excretion. However, if the patient is ill and has a high fever or an underlying medical condition, oral antibiotic therapy with doxycycline or a quinolone can be initiated.
Noncholera Vibrio infections
Patients with noncholera Vibrio wound infection or septicemia are much more ill and frequently have other medical conditions. Medical therapy consists of:
- Prompt initiation of effective antibiotic therapy (doxycycline or a quinolone)
- Intensive medical therapy with aggressive fluid replacement and vasopressors for hypotension and septic shock to correct acid-base and electrolytes abnormalities that may be associated with severe sepsis
- Early fasciotomy within 24 hours after development of clinical symptoms can be life-saving in patients with necrotizing fasciitis.
- Early debridement of the infected wound has an important role in successful therapy and is especially indicated to avoid amputation of fingers, toes, or limbs.
- Expeditious and serial surgical evaluation and intervention are required because patients may deteriorate rapidly, especially those with necrotizing fasciitis or compartment syndrome.
- Reconstructive surgery, such as skin grafts, are used in the recovery phase.
V. harveyi is a pathogen of several aquatic animals, and is notable as a cause of luminous vibriosis in shrimp (prawns)
The "typical", early-discovered Vibrio species, such as V. cholerae, have a single polar flagellum (monotrichous) with sheath. Some species, such as V. parahaemolyticus and V. alginolyticus, have both a single polar flagellum with sheath and thin flagella projecting in all directions (peritrichous), and the other species, such as V. fischeri, have tufts of polar flagella with sheath (lophotrichous).
Natural transformation is a common bacterial adaptation for DNA transfer that employs numerous bacterial gene products. For a recipient bacterium to bind, take up, and recombine exogenous DNA into its chromosome, it must become competent, that is, enter a special physiologic state. The DNA-uptake process of naturally competent V. cholerae involves an extended competence-induced pilus and a DNA binding protein that acts as a rachet and reels DNA into the periplasm. Natural transformation has also been described for V. fisheri, V. vulnificus and V. parahaemolyticus.
V. cholerae has been used in discoveries of many bacterial small RNAs. Using sRNA-Seq and Northern blot candidate sRNAs were identified and characterised as IGR-sRNA (intragenic region), AS-sRNAs (transcribed from the antisense strand of the ORF) and ORF-derived. One of the candidates from this study, IGR7, was shown to be involved in carbon metabolism and later renamed MtlS RNA. Other sRNAs identified in V. cholerae through genetic screens and computational methods include Qrr RNA, Vibrio regulatory RNA of OmpA, MicX sRNA, Vibrio cholerae ToxT activated RNAs, tfoR RNA, and VqmR sRNA.
- Thompson FL, Gevers D, Thompson CC, Dawyndt P, Naser S, Hoste B, Munn CB, Swings J (2005). "Phylogeny and Molecular Identification of Vibrios on the Basis of Multilocus Sequence Analysis". Applied and Environmental Microbiology. 71 (9): 5107–5115. doi:10.1128/AEM.71.9.5107-5115.2005. PMC . PMID 16151093.
- Ryan KJ; Ray CG, eds. (2004). Sherris Medical Microbiology (4th ed.). McGraw Hill. ISBN 0-8385-8529-9.
- Faruque SM; Nair GB, eds. (2008). Vibrio cholerae: Genomics and Molecular Biology. Caister Academic Press. ISBN 978-1-904455-33-2.
- Madigan, Michael; Martinko, John, eds. (2005). Brock Biology of Microorganisms (11th ed.). Prentice Hall. ISBN 0-13-144329-1.
- Trucksis, Michele; Michalski, Jane; Deng, Ying Kang; Kaper, James B. (1998-11-24). "The Vibrio cholerae genome contains two unique circular chromosomes". Proceedings of the National Academy of Sciences. 95 (24): 14464–14469. doi:10.1073/pnas.95.24.14464. ISSN 0027-8424. PMC . PMID 9826723.
- Okada, Kazuhisa; Iida, Tetsuya; Kita-Tsukamoto, Kumiko; Honda, Takeshi (2005-01-15). "Vibrios Commonly Possess Two Chromosomes". Journal of Bacteriology. 187 (2): 752–757. doi:10.1128/JB.187.2.752-757.2005. ISSN 0021-9193. PMC . PMID 15629946.
- Rasmussen, Tue; Jensen, Rasmus Bugge; Skovgaard, Ole (2007-07-11). "The two chromosomes of Vibrio cholerae are initiated at different time points in the cell cycle". The EMBO Journal. 26 (13): 3124–3131. doi:10.1038/sj.emboj.7601747. ISSN 0261-4189. PMC . PMID 17557077.
- Kirkup, Benjamin C.; Chang, LeeAnn; Chang, Sarah; Gevers, Dirk; Polz, Martin F. (2010-01-01). "Vibrio chromosomes share common history". BMC Microbiology. 10: 137. doi:10.1186/1471-2180-10-137. ISSN 1471-2180. PMC . PMID 20459749.
- Pot, B., Gillis, M., and De Ley, J., The genus Aquaspirillum. In: Balows, A., Trüper, H.G., Dworkin, M., Harder, W., Schleifer, K.-H. (Eds.). The prokaryotes, 2nd ed, vol. 3. Springer-Verlag. New York. 1991
- Hugh, R. (1964). The proposed conservation of the generic name Vibrio Pacini 1854 and designation of the neotype strain of Vibrio cholerae Pacini 1854. International Journal of Systematic and Evolutionary Microbiology, 14(2), 87-101, [permanent dead link].
- C.Michael Hogan. 2010. Bacteria. Encyclopedia of Earth. eds. Sidney Draggan and C.J.Cleveland, National Council for Science and the Environment, Washington DC Archived May 11, 2011, at the Wayback Machine.
- Tan, Wen-Si; Muhamad Yunos, Nina Yusrina; Tan, Pui-Wan; Mohamad, Nur Izzati; Adrian, Tan-Guan-Sheng; Yin, Wai-Fong; Chan, Kok-Gan (8 July 2014). "Characterisation of a Marine Bacterium Vibrio Brasiliensis T33 Producing N-acyl Homoserine Lactone Quorum Sensing Molecules". Sensors. 14 (7): 12104–12113. doi:10.3390/s140712104.
- Jablecki J, Norton SA, Keller GR, DeGraw C, Ratard R, Straif-Bourgeois S, Holcombe JM, Quilter S, Byers P, McNeill M, Schlossberg D, Dohony DP, Neville J, Carlo J, Buhner D, Smith BR, Wallace C, Jernigan D, Sobel J, Reynolds M, Moore M, Kuehnert M, Mott J, Jamieson D, Burns-Grant G, Misselbeck T, Cruise PE, LoBue P, Holtz T, Haddad M, Clark TA, Cohen A, Sunenshine R, Jhung M, Vranken P, Lewis FM, Carpenter LR (2005). "Infectious Disease and Dermatologic Conditions in Evacuees and Rescue Workers After Hurricane Katrina - Multiple States, August–September, 2005". Mortality and Morbidity Weekly Report. 54: 1–4.
- Bureau of Community Environmental Health, Division of Environmental Health, Florida Department of Health (2005). "Annual Report, Florida". Food and Waterborne Illness Surveillance and Investigation: 21.
- "Infections from some foodborne germs increased, while others remained unchanged in 2012". Centers for Disease Control. April 18, 2013. Retrieved April 19, 2013.
- Joseph S, Colwell R, Kaper J (1982). "Vibrio parahaemolyticus and related halophilic Vibrios". Crit Rev Microbiol. 10 (1): 77–124. doi:10.3109/10408418209113506. PMID 6756788.
- Austin B & Zhang XH (2006). "Vibrio harveyi: a significant pathogen of marine vertebrates and invertebrates". Letters in Applied Microbiology. 43 (2): 119–214. doi:10.1111/j.1472-765X.2006.01989.x. PMID 16869892.
- George M. Garrity, ed. (2005). Bergey's manual of Systematic Bacteriology. Vol. 2 Part B (2nd ed.). Springer. pp. 496–8. ISBN 0-387-24144-2.
- Chen I, Dubnau D (2004). "DNA uptake during bacterial transformation". Nat. Rev. Microbiol. 2 (3): 241–9. doi:10.1038/nrmicro844. PMID 15083159.
- Bernstein H, Bernstein C, Michod RE (2018). Sex in microbial pathogens. Infection, Genetics and Evolution volume 57, pages 8-25. https://doi.org/10.1016/j.meegid.2017.10.024
- Matthey N, Blokesch M (2016). "The DNA-Uptake Process of Naturally Competent Vibrio cholerae". Trends Microbiol. 24 (2): 98–110. doi:10.1016/j.tim.2015.10.008. PMID 26614677.
- Pollack-Berti A, Wollenberg MS, Ruby EG (2010). "Natural transformation of Vibrio fischeri requires tfoX and tfoY". Environ. Microbiol. 12 (8): 2302–11. doi:10.1111/j.1462-2920.2010.02250.x. PMC . PMID 21966921.
- Gulig PA, Tucker MS, Thiaville PC, Joseph JL, Brown RN (2009). "USER friendly cloning coupled with chitin-based natural transformation enables rapid mutagenesis of Vibrio vulnificus". Appl. Environ. Microbiol. 75 (15): 4936–49. doi:10.1128/AEM.02564-08. PMC . PMID 19502446.
- Chen Y, Dai J, Morris JG, Johnson JA (2010). "Genetic analysis of the capsule polysaccharide (K antigen) and exopolysaccharide genes in pandemic Vibrio parahaemolyticus O3:K6". BMC Microbiol. 10: 274. doi:10.1186/1471-2180-10-274. PMC . PMID 21044320.
- Liu, Jane M.; Livny, Jonathan; Lawrence, Michael S.; Kimball, Marc D.; Waldor, Matthew K.; Camilli, Andrew (April 2009). "Experimental discovery of sRNAs in Vibrio cholerae by direct cloning, 5S/tRNA depletion and parallel sequencing". Nucleic Acids Research. 37 (6): e46. doi:10.1093/nar/gkp080. ISSN 1362-4962. PMC . PMID 19223322.