Henneguya exilis Kudo Associated with Granulomatous Branchitis of Channel Catfish Ictalurus punctatus (Rafinesque)

G. E. Duhamel, M. L. Kent, N. O. Dybdal, Ronald Hedrick

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Outbreaks of a chronic branchitis in channel catfish Ictalurus punctatus (Rafinesque) were observed on four fish farms throughout the state of California from November 1982 to April 1984. Severe granulomatous inflammation of the gill filaments with necrosis of the cartilage of the gill ray and diffuse epithelial hyperplasia, resulting in extensive fusion of gill lamellae, was present on histologic examination of gill specimens from 35 out of 44 fish examined. Numerous, small trophozoites morphologically consistent with presporogonic myxosporean parasites were consistently associated with the inflammatory process. Mature spores of Henneguya exilis Kudo were present in large numbers in gill specimens from two fish and only occasionally in 22 others. Similar cases referred to as “Hamburger Gill Disease” or “proliferative gill disease” have been known to occur in the south-central United States. This report describes the morphologic changes of this condition and discusses its possible pathogenesis.

Original languageEnglish (US)
Pages (from-to)354-361
Number of pages8
JournalVeterinary Pathology
Volume23
Issue number4
DOIs
StatePublished - Jan 1 1986

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Henneguya
Ictaluridae
Ictalurus punctatus
gills
Fishes
hamburgers
Trophozoites
Fisheries
trophozoites
Midwestern United States
fish farms
Exilis
Spores
fish
hyperplasia
cartilage
Cartilage
Hyperplasia
Disease Outbreaks
necrosis

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Henneguya exilis Kudo Associated with Granulomatous Branchitis of Channel Catfish Ictalurus punctatus (Rafinesque). / Duhamel, G. E.; Kent, M. L.; Dybdal, N. O.; Hedrick, Ronald.

In: Veterinary Pathology, Vol. 23, No. 4, 01.01.1986, p. 354-361.

Research output: Contribution to journalArticle

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