Pathology associated with Edwardsiella ictaluri in catfish, Ictalurus punctatus Rafinesque, and Danio devario (Hamilton‐Buchanan, 1822)

Abstract

The pathology associated with infections of Edwardsiellu ictaluri in a new host, the danio, is described and compared to that observed in the channel catfish. In catfish the acute stage was characterized by petechial haemorrhage of the jaw, ventral body surface, and at the base of the fins. In chronic cases a characteristic finding was an erosion of skin and muscle overlying the skull, exposing bone and occasionally the brain. Histologically there was a diffuse granulomatous inflammation of the olfactory bulb and the telencephalon. In the catfish the infection was often systemic, involving intestine, liver, spleen, and occasionally kidney. In the danio no gross lesions were observed. Infected fish exhibited an erratic, spinning-type swimming behaviour. Histologically, lesions usually were confined to the brain. They consisted of an acute, primarily granulocytic inflammation of the medulla oblongata (rhomboencephalon). Only one fish showed evidence of a systemic infection.

Pathology of Edwardsiella tarda infection in turbot, Scophthalmus maximus (L.)

“…The histopathological lesions observed in our work are similar in many ways to the lesions described in other fish species affected by E. tarda . Histopathological studies on infections by E. tarda have been made in a number of different species by Miyazaki & Egusa (1976a,b,c) and Miyazaki (1980) described the infection in Japanese eel, Anguilla japonica (Temminck & Schlegel), Miyazaki & Plumb (1985) in channel catfish, Ictalurus punctatus (Rafinesque), and Blazer, Shotts & Waltman (1985) in Danio devario (Hamilton). Miyazaki & Kaige (1985) described the comparative histopathology of edwardsiellosis caused by E. tarda and E. ictaluri in different fish species.…”

Discovery of J Chain in African Lungfish (Protopterus dolloi, Sarcopterygii) Using High Throughput Transcriptome Sequencing: Implications in Mucosal Immunity

“…Reddening inside and around the buccal cavity was often observed in infected specimens even in the absence of lesions. Both signs are typically associated with E. ictaluri infections in teleost fish [32], [33]. Control and infected specimens were euthanized by a lethal dose of MS-222 diluted in water.…”

Isolation and characterization of Edwardsiella ictaluri strains as pathogens from diseased yellow catfish Pelteobagrus fulvidraco (Richardson) cultured in China

“…Isolation of E. ictaluri from non‐ictalurids has been reported in natural disease outbreaks in green knife fish Eigenmannia virescens (Kent & Lyons 1982), danio Danio devario (Blazer, Shotts & Waltman 1985; Waltman, Shotts & Blazer 1985; Petrie‐Hanson, Romano, Mackey, Khosravi, Hohn & Boyle 2007), walking catfish Clarias batrachus L. (Kasornchandra, Rogers & Plumb 1987), rosy barb Puntius conchonius (Humphrey, Lancaster, Gudkovs & McDonald 1986), rainbow trout Oncorhynchus mykiss (Keskin, Secer, Izgur, Turkyilmaz & Mkakosya 2004), freshwater catfish Pangasius hypophthalmus (Sauvage) (Crumlish, Dung, Turnbull, Ngoc & Ferguson 2002), Tra catfish Pangasianodon hypophthalmus (Sauvage) (Truong, Areechon, Srisapoome & Mahasawasde 2007), harleququin tetra Rosbara heteromorpha (Reid & Boyle 1989) and tadpole madtoms Noturus gyrinus (Klesius, Lovy, Evans, Washhuta & Arias 2003). Additionally, other species, such as chinook salmon Oncorhynchus tshawytscha , tilapia Sarotherodon aureus and European catfish Silurus gianis , have been infected experimentally with E. ictaluri (Plumb & Sanchez 1983; Plumb & Huge 1987; Baxa, Groff, Wishkovsky & Hdrick 1990), but natural outbreaks in these species have not been reported.…”