Characterization of Edwardsiella tarda isolated from farm-cultured eels, Anguilla japonica, in the Republic of Korea.
We surveyed the occurrence of edwardsiellosis on eel farms and investigated the characteristics of Edwardsiella tarda isolated from farm-cultured eels in the Republic of Korea. The occurrence rate of edwardsiellosis was 72% in the investigated samples. Among the edwardsiellosis cases, 46% were found to be mixed infections, with parasites and other kinds of bacteria. Some of the biochemical characteristics of the E. tarda isolates were different from those of the previously reported E. tarda isolated from several kinds of fish from different countries, especially in terms of hydrogen sulfide and indole production. The E. tarda isolated from the eels in the Republic of Korea had the characteristics of two biogroups, the wild-type biogroup and biogroup 1. The enzymatic activity of the E. tarda showed similar patterns to previously reported E. tarda strains and ATCC strains. This is the first it has been reported that E. tarda isolated from farm-cultured eels had some different biochemical characteristics from those of previously reported E. tarda isolated from several kinds of fish.
Joh
Seong-Joon
SJ
Laboratory of Aquatic Animal Diseases, Department of Veterinary Research, National Veterinary Research and Quarantine Service, Ministry of Food, Agriculture, Forestry and Fisheries, Republic of Korea. johsj0901@korea.kr
Kim
Min-Jeong
MJ
Kwon
Hyuk-Man
HM
Ahn
Eun-Hye
EH
Jang
Hwan
H
Kwon
Jun-Hun
JH
D000811:Anguilla; D000818:Animals; D017756:Aquaculture; D020609:Edwardsiella tarda / Q000302:isolation & purification*; D004756:Enterobacteriaceae Infections / Q000382:microbiology / Q000662:veterinary*; D005393:Fish Diseases / Q000382:microbiology*; D056910:Republic of Korea