Biochemical and enzymatic characterization of Edwardsiella tarda from the United States and Taiwan.

Waltman, W. D.; Shotts, Emmett B.; Hsu, T C

doi:10.3147/jsfp.21.1

Cited by 18 publications

(3 citation statements)

References 36 publications

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“…Comparisons of multiple isolates have demonstrated very little diversity (Hawke et al 1981;Waltman et al 1986). Comparisons of multiple isolates have demonstrated very little diversity (Hawke et al 1981;Waltman et al 1986).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Zebrafish Danio rerio as a Model for Enteric Septicemia of Catfish (ESC)

et al. 2007

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Zebrafish (also known as zebra danio) Danio rerio were injected intramuscularly with Edwardsiella ictaluri at doses of 6 x 10(3), 6 x 10(4), or 6 x 10(5) colony-forming units per gram (CFU/g) or sterile phosphate-buffered saline (sham) or were not injected. Mortality occurred from 2 to 5 d postinjection (dpi) at rates of 0, 76.6, and 81.3% for the low, medium, and high doses, respectively, and E. ictaluri was isolated from dead fish. Survivors were sampled at 10 dpi and E. ictaluri was not isolated. Sham-injected and noninjected controls did not suffer mortality. Histopathology trials were performed in which zebrafish were injected with 1 x 10(4) CFU/g or sham-injected and sampled at 12, 24, 48, 72, and 96 h postinjection for histological interpretation. Collectively, these zebrafish demonstrated increasing severity of splenic, hepatic, cardiac, and renal interstitial necrosis over time. To evaluate the progression of chronic infection, zebrafish were injected with 1 x 10(2) CFU/g and held for 1 month postinjection. Beginning at 12 dpi and continuing for an additional 2 weeks, zebrafish demonstrated abnormal spiraling and circling swimming behaviors. Histopathology demonstrated necrotizing encephalitis. In immersion trials, zebrafish were exposed to low, medium, and high doses (averaging 1.16 x 10(5), 1.16 x 10(6), and 1.16 x 10(7) CFU/mL of tank water) of E. ictaluri for 2 h. Mortality occurred from 5 to 9 d postexposure at rates of 0, 3.3, and 13.3% for the low, medium, and high doses, respectively; E. ictaluri was isolated from dead fish. Channel catfish Ictalurus punctatus exposed to the medium doses suffered 100% mortality, and E. ictaluri was isolated from these fish. This study demonstrates the potential use of zebrafish as a model for E. ictaluri pathogenesis.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Zebrafish Danio rerio as a Model for Enteric Septicemia of Catfish (ESC)

et al. 2007

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“…E. tarda has been reported in various countries, including Egypt, Ethiopia, Indonesia, Taiwan, Bangladesh, Venezuela, Uganda, Thailand, and Nigeria. These countries have tropical climates and are home to both local fish species and commonly cultured fish [74,[78][79][80][81][82][83][84][85].…”

Section: Piscine Speciesmentioning

confidence: 99%

“…Environmental factors such as high temperatures, poor water quality, and organic debris trigger Edwardsiella infections in fish. These infections are most common from spring to early autumn when water temperatures range from 22 to 28 • C, particularly in tropical and subtropical regions [74,[78][79][80][81][82][83][84][85].…”

Section: Fish Diseasesmentioning

confidence: 99%

Expanding the Spectrum of Diseases and Disease Associations Caused by Edwardsiella tarda and Related Species

Janda,

Duman

2024

Microorganisms

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The genus Edwardsiella, previously residing in the family Enterobacteriaceae and now a member of the family Hafniaceae, is currently composed of five species, although the taxonomy of this genus is still unsettled. The genus can primarily be divided into two pathogenic groups: E. tarda strains are responsible for almost all human infections, and two other species (E. ictaluri, E. piscicida) cause diseases in fish. Human infections predominate in subtropical habitats of the world and in specific geospatial regions with gastrointestinal disease, bloodborne infections, and wound infections, the most common clinical presentations in decreasing order. Gastroenteritis can present in many different forms and mimic other intestinal disturbances. Chronic gastroenteritis is not uncommon. Septicemia is primarily found in persons with comorbid conditions including malignancies and liver disease. Mortality rates range from 9% to 28%. Most human infections are linked to one of several risk factors associated with freshwater or marine environments such as seafood consumption. In contrast, edwardsiellosis in fish is caused by two other species, in particular E. ictaluri. Both E. ictaluri and E. piscicida can cause massive outbreaks of disease in aquaculture systems worldwide, including enteric septicemia in channel catfish and tilapia. Collectively, these species are increasingly being recognized as important pathogens in clinical and veterinary medicine. This article highlights and provides a current perspective on the taxonomy, microbiology, epidemiology, and pathogenicity of this increasingly important group.

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Eel Bacterial Diseases

Plumb

Hanson

2010

Health Maintenance and Principal Microbial Diseases of Cultured Fishes

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Biochemical and enzymatic characterization of Edwardsiella tarda from the United States and Taiwan.

Cited by 18 publications

References 36 publications

Evaluation of Zebrafish Danio rerio as a Model for Enteric Septicemia of Catfish (ESC)

Evaluation of Zebrafish Danio rerio as a Model for Enteric Septicemia of Catfish (ESC)

Expanding the Spectrum of Diseases and Disease Associations Caused by Edwardsiella tarda and Related Species

Eel Bacterial Diseases

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