- International Journal of Systematic and Evolutionary Microbiology
- Volume 31, Issue 4
f Edwardsiella ictaluri sp. nov., the Causative Agent of Enteric Septicemia of Catfish
- Authors: JOHN P. HAWKE†, ALMA C. McWHORTER‡, ARNOLD G. STEIGERWALT‡, DON J. BRENNER‡
- Int J Syst Evol Microbiol, October 1981 31: 396-400, doi: 10.1099/00207713-31-4-396
- Subject: Original Papers Relating To Systematic Bacteriology
- Published Online:
We characterized 13 cultures of the enteric bacterium causing enteric septicemia of catfish by studying their biochemical reactions, deoxyribonucleic hybridizations, and deoxyribonucleic acid guanine-plus-cytosine contents. We confirmed that this bacterium is a new species, which is most closely related to Edwardsiella tarda of the family Enterobacteriaceae. Five strains of the bacterium causing enteric septicemia of catfish were 80% or more related to the type strain, SECFDL GA 77–52 (= CDC 1976–78 = ATCC 33202), in 60°C deoxyribonucleic acid homology reactions. Species level relatedness among the 13 strains which we studied was demonstrated by the more than 80% relatedness in 75°C reactions. The bacterium causing enteric septicemia of catfish was most closely related to E. tarda (56 to 62%) in 60°C reactions. The guanine-plus-cytosine was 53 mol%, as determined by buoyant density centrifugation. We propose the name Edwardsiella ictaluri sp. nov. for the bacterium causing enteric septicemia of catfish.
Present address: Enteric Section, Centers for Disease Control, Atlanta, GA 30333.
Present address: Alabama Department of Conservation and Natural Resources, Marine Resources Division, Gulf Shores, AL 36542.
Copyright © 1981 International Union of Microbiological Societies | Published by the International Union of Microbiological Societies
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