Vibrio (genus): Difference between revisions
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'''Vibrio''' is a genus of facultatively anaerobic, [[oxidase|oxidase-positive]], [[Gram stain|Gram-negative]] bacteria. They are flagellated and in the shape of curved rods. Most species of the genus are pathogenic, although not all to humans, and there can be nonpathogenic strains within a species. Some Vibrio species are important pathogens of fish and crustaceans, which may be opportunistic pathogens in people with skin wounds. | {{subpages}} | ||
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Part of the family ''[[Vibrionaceae]]'', '''''Vibrio''''' is a genus of facultatively anaerobic, [[oxidase|oxidase-positive]], [[Gram stain|Gram-negative]] bacteria. They are flagellated and in the shape of curved rods. Most species of the genus are [[pathogen|pathogenic]], although not all to humans, and there can be nonpathogenic strains within a species. Some ''Vibrio'' species are important pathogens of fish and crustaceans, which may be opportunistic pathogens in people with skin wounds. | |||
Another classification is whether they are | Another classification is whether they are [[halophile]]s, requiring sodium chloride for growth, or are nonhalophilic. The nonhalophilic forms tolerate salt, so a nonpathogenic strain was selected for laboratory quality control of thiosulfate-citrate-bile salts-sucrose (TCBS) culture media selective for pathogenic vibrios. | ||
<ref name=Taylor>{{citation | <ref name=Taylor>{{citation | ||
| Journal of Clinical Pathology | | Journal of Clinical Pathology | ||
| Line 13: | Line 15: | ||
==Pathology== | ==Pathology== | ||
===Human=== | ===Human=== | ||
In man, Vibrio strains can cause potentially fatal [[gastroenteritis]], wound infections, and septicemia.<ref name=Hoi>{{citation | In man, Vibrio strains can cause potentially fatal [[gastroenteritis]], wound infections, and [[septicemia]].<ref name=Hoi>{{citation | ||
| url = http://emedicine.medscape.com/article/232038-overview | | url = http://emedicine.medscape.com/article/232038-overview | ||
| journal = eMedicine | | journal = eMedicine | ||
| Line 29: | Line 31: | ||
|- | |- | ||
| Gastroenteritis | | Gastroenteritis | ||
| *''[[Vibrio parahaemolyticus]]'' | | | ||
*''[[Vibrio parahaemolyticus]]'' | |||
*''[[Vibrio cholerae| Vibrio cholerae non-01]]'' | *''[[Vibrio cholerae| Vibrio cholerae non-01]]'' | ||
*''[[Vibrio fluvialis]]'' | *''[[Vibrio fluvialis]]'' | ||
| Line 36: | Line 39: | ||
*''[[Vibrio hollisae]]'' | *''[[Vibrio hollisae]]'' | ||
*''[[Vibrio alginolyticus]]'' | *''[[Vibrio alginolyticus]]'' | ||
* | *''[[Vibrio vulnificus]]'' | ||
| Cytotoxin, Hemolysin | | Cytotoxin, Hemolysin | ||
|- | |- | ||
| Wound infection | | Wound infection | ||
| *''[[Vibrio alginolyticus]]'' | | | ||
*''[[Vibrio alginolyticus]]'' | |||
*''[[Vibrio vulnificus]]'' | *''[[Vibrio vulnificus]]'' | ||
*''[[Vibrio cholerae| Vibrio cholerae non-01]]'' | *''[[Vibrio cholerae| Vibrio cholerae non-01]]'' | ||
| Line 51: | Line 55: | ||
|- | |- | ||
| Septicemia | | Septicemia | ||
| *''[[Vibrio vulnificus]]'' | | | ||
*''[[Vibrio vulnificus]]'' | |||
*''[[Vibrio fluvialis]]'' | *''[[Vibrio fluvialis]]'' | ||
*''[[Vibrio damsela]]'' | *''[[Vibrio damsela]]'' | ||
| Line 58: | Line 63: | ||
| proteases, endotoxic lipopolysaccharide | | proteases, endotoxic lipopolysaccharide | ||
|} | |} | ||
Wound infection can progress to [[necrotizing fascitis]].<ref>{{citation | |||
| journal = Kournal of Clinical Microbiology | |||
| date = July 2003 | |||
| pages = 3427-3429 | volume= 41 | issue = 7 | |||
| doi = 10.1128/JCM.41.7.3427-3429.2003 | |||
| url = http://jcm.asm.org/cgi/content/full/41/7/3427 | |||
| title = Necrotizing Fasciitis Due to ''Vibrio alginolyticus'' in an Immunocompetent Patient | |||
| author = Gomez JM ''et al.''}}</ref> | |||
===Marine life=== | ===Marine life=== | ||
In a study done in [[Gudalajara]], [[Mexico]], the overall presence of ''V. parahaemolyticus'' samples was 45.6%, with 71.4% in fish, 44.0% in oysters, and 27.6% in shrimp.<ref>{{citation | Some species are nonpathogenic to humans, but may, such as ''[[Vibrio harveyi]]'' be pathogenic to marine life. Others are hazardous to humans and fish or shellfish. In a study done in [[Gudalajara]], [[Mexico]], the overall presence of ''V. parahaemolyticus'' samples was 45.6%, with 71.4% in fish, 44.0% in oysters, and 27.6% in shrimp.<ref>{{citation | ||
| journal = Rev Latinoam Microbiol. | | journal = Rev Latinoam Microbiol. | ||
| date 1993 Jul-Sep | | date 1993 Jul-Sep | ||
| Line 70: | Line 84: | ||
| PMID= 8047729 | | PMID= 8047729 | ||
}}</ref> | }}</ref> | ||
Control of ''Vibrio'' species is a major concern in [[aquaculture]]. | |||
==References== | ==References== | ||
{{reflist}} | {{reflist}} | ||
Revision as of 06:52, 31 May 2009
Part of the family Vibrionaceae, Vibrio is a genus of facultatively anaerobic, oxidase-positive, Gram-negative bacteria. They are flagellated and in the shape of curved rods. Most species of the genus are pathogenic, although not all to humans, and there can be nonpathogenic strains within a species. Some Vibrio species are important pathogens of fish and crustaceans, which may be opportunistic pathogens in people with skin wounds.
Another classification is whether they are halophiles, requiring sodium chloride for growth, or are nonhalophilic. The nonhalophilic forms tolerate salt, so a nonpathogenic strain was selected for laboratory quality control of thiosulfate-citrate-bile salts-sucrose (TCBS) culture media selective for pathogenic vibrios. [1]
Pathology
Human
In man, Vibrio strains can cause potentially fatal gastroenteritis, wound infections, and septicemia.[2]
The epidemic significance of cholera is so great that medical microbiologists split the forms into enteropathogenic V. chlolerae, and the other pathogenic Vibrios. Of the non-cholera forms, in the United States, Vibrio parahaemolyticus is the most frequent source of infection, but Vibrio vulnificus causes 94% of the reported deaths. Since TCBS media are not routinely used for stool cultures, gastroenteritis may be underreported.
| Pathology | Species | Mechanisms |
|---|---|---|
| Gastroenteritis | Cytotoxin, Hemolysin | |
| Wound infection | protease, hemolysin, lipase, DNAase, cytolysin | |
| Septicemia | proteases, endotoxic lipopolysaccharide |
Wound infection can progress to necrotizing fascitis.[3]
Marine life
Some species are nonpathogenic to humans, but may, such as Vibrio harveyi be pathogenic to marine life. Others are hazardous to humans and fish or shellfish. In a study done in Gudalajara, Mexico, the overall presence of V. parahaemolyticus samples was 45.6%, with 71.4% in fish, 44.0% in oysters, and 27.6% in shrimp.[4]
Control of Vibrio species is a major concern in aquaculture.
References
- ↑ Taylor JA, Barrow GI (1981), A non-pathogenic vibrio for the routine quality control of TCBS cholera medium., vol. 34, DOI:10.1136/jcp.34.2.208, at 208-212
- ↑ Hoi H, Do TH, Ho TT (March 30, 2009), "Vibrio Infections", eMedicine
- ↑ Gomez JM et al. (July 2003), "Necrotizing Fasciitis Due to Vibrio alginolyticus in an Immunocompetent Patient", Kournal of Clinical Microbiology 41 (7): 3427-3429, DOI:10.1128/JCM.41.7.3427-3429.2003
- ↑ Torres Vitela MR, Fernández Escartín E., "[Incidence of Vibrio parahaemolyticus in raw fish, oysters, and shrimp[Article in Spanish]]", Rev Latinoam Microbiol. 35 (3): 267-72.Links