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

Vicki Suzette Blazer, E. B. Shotts, W. D. Waltman

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The pathology associated with infections of Edwardsiella 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.

Original languageEnglish (US)
Pages (from-to)167-175
Number of pages9
JournalJournal of Fish Biology
Volume27
Issue number2
DOIs
StatePublished - Jan 1 1985

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

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