Edwardsiella tarda

Pictures

Picture	Title	Caption	Copyright
Title Edwardsiella tarda infection Caption (A) Edwardsiella tarda infection in channel catfish. The muscle tissue is necrotic, has lost its firmness and has open lesions (arrow). (Photo by Ahmad Darwish.) (B) A juvenile largemouth bass with necrotic E. tarda lesion on the caudal peduncle (arrow). Copyright J. A. Plumb	Edwardsiella tarda infection	(A) Edwardsiella tarda infection in channel catfish. The muscle tissue is necrotic, has lost its firmness and has open lesions (arrow). (Photo by Ahmad Darwish.) (B) A juvenile largemouth bass with necrotic E. tarda lesion on the caudal peduncle (arrow).	J. A. Plumb
Title Edwardsiella tarda infection Caption (A) Edwardsiella tarda infection in Japanese eel with haemorrhagic and congested anal fin (arrow). (B) Cross-sections of body of Japanese eel with inflamed and necrotic muscle lesions (arrows). Copyright J. A. Plumb	Edwardsiella tarda infection	(A) Edwardsiella tarda infection in Japanese eel with haemorrhagic and congested anal fin (arrow). (B) Cross-sections of body of Japanese eel with inflamed and necrotic muscle lesions (arrows).	J. A. Plumb
Title Histopathology of Edwardsiella tarda infection Caption Histopathology of Edwardsiella tarda infection in several different fish. (A) Abscess (arrow) in kidney of Japanese eel (haematoxylin and eosin (H & E), x 31). (B) Early E. tarda infection in liver of tilapia. Affected hepatic cells are necrotized (N) which is followed by macrophage infiltration (arrow) (Giemsa, x 80). (C) Granuloma (arrow) formation in liver of E. tarda-infected red sea bream (Giemsa, x 200). (D) Neutrophils gorged with E. tarda (arrow) from abscess in the kidney of eel (Giemsa, x 1000). (All photographs by T. Miyazaki.) Copyright J. A. Plumb	Histopathology of Edwardsiella tarda infection	Histopathology of Edwardsiella tarda infection in several different fish. (A) Abscess (arrow) in kidney of Japanese eel (haematoxylin and eosin (H & E), x 31). (B) Early E. tarda infection in liver of tilapia. Affected hepatic cells are necrotized (N) which is followed by macrophage infiltration (arrow) (Giemsa, x 80). (C) Granuloma (arrow) formation in liver of E. tarda-infected red sea bream (Giemsa, x 200). (D) Neutrophils gorged with E. tarda (arrow) from abscess in the kidney of eel (Giemsa, x 1000). (All photographs by T. Miyazaki.)	J. A. Plumb
Title Edwardsiella septicaemia Caption Edwardsiella ictaluri, E. tarda, Aeromonas hydrophila and Pseudomonas fluorescens on Edwardsiella isolation media incubated at 25°C for 48 h. (Photo by D. Earlix.) Copyright J. A. Plumb	Edwardsiella septicaemia	Edwardsiella ictaluri, E. tarda, Aeromonas hydrophila and Pseudomonas fluorescens on Edwardsiella isolation media incubated at 25°C for 48 h. (Photo by D. Earlix.)	J. A. Plumb

Identity

Preferred Scientific Name

• Edwardsiella tarda

Taxonomic Tree

• Domain: Bacteria
•     Phylum: Proteobacteria
•         Class: Gammaproteobacteria
•             Order: Enterobacteriales
•                 Family: Enterobacteriaceae
•                     Genus: Edwardsiella
•                         Species: Edwardsiella tarda

Disease/s Table

Distribution Table

The distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report.

Pathogen Characteristics

Isolates used to establish the genus Edwardsiella, described by Sakazaki and Murata (1962), were originally from human faeces in the USA and snakes in Japan, simultaneously in 1959 (Ewing et al., 1965; Sakazaki, 1967). Species of Edwardsiella, a member of the Enterobacteriaceae, are small, straight rods of about 1 mm in diameter and 2-3 mm in length (Farmer and McWhorter, 1984). They are Gram-negative, usually motile, with peritrichous flagella, and are facultatively anaerobic.

Host Animals

Vectors and Intermediate Hosts

Impact Summary

References

Ewing WH, McWhorter AC, Escobar MR, Lubin AH, 1965. Edwardsiella, a new genus of Enterobacteriaceae based on a new species, Edwardsiella tarda. International Bulletin of Bacteriological Nomenclature and Taxonomy, 15:33-38.

Farmer JJ III, McWhorter AC, 1984. Genus X. Edwardsiella Ewing and McWhorter (1965). In: Krieg NR, Holt JG, eds. Bergey’s Manual of Systematic Bacteriology, Vol. 1. Baltimore, USA: Williams and Wilkins, 486-491.

Sakazaki R, 1967. Studies on the Asakusa group of Enterobacteriaceae (Edwardsiella tarda). Japanese Journal of Medical Science and Biology, 20:205-212.

Sakazaki R, Murata Y, 1962. The new group of the Enterobacteriaceae, the Azakusa group. Japanese Journal of Bacteriology, 17:616-617.

Distribution Maps

• = Present, no further details
• = Evidence of pathogen
• = Widespread
• = Last reported
• = Localised
• = Presence unconfirmed
• = Confined and subject to quarantine
• = See regional map for distribution within the country
• = Occasional or few reports

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