OPERCULAR CYST FORMATION IN TROUT INFECTED WITH Myxosoma cerebralis

Taylor, Robert E. L.; Haber, Meryl H.

doi:10.7589/0090-3558-10.4.347

Cited by 10 publications

(5 citation statements)

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“…Myxoboltis cerebralis (Hofer) infects young salmonids by invading and causing destruction of cartilage cells. A granulomatous response with infiltration by macrophages and mononuclear leucocytes has been reported (Roberts & Elson 1970;Taylor & Haber 1974;Halliday 1976). Other myxosporeans cause complete degeneration of invaded areas accompanied by hypertrophy of connective tissue cells and invasion by fibroblasts.…”

Section: Introductionmentioning

confidence: 84%

Characterization of a host response to the myxosporean parasite, Ceratomyxa shasta (Noble), by histology, scanning electron microscopy and immunological techniques

Bartholomew

Smith

Rohovec

et al. 1989

Journal of Fish Diseases

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The tissue response of Salmo gairdneri Richardson, against the myxosporean parasite. Ceratomyxa shasta (Noble), was investigated using histologieal teehniques, scanning eleetron microscopy and immunologieal methods. The progress of infection in C. shastasusceptible and resistant stcelhead and rainbow trout was examined by standard histological techniques and by indirect fluorescent antibody methods using monoelonal antibodies directed against C shasta antigens. Trophozoite stages were first observed in the posterior intestine and there was indication that resistance was due to the inability of the parasite to penetrate this tissue rather than to an infiammator>^ response. Examination of a severely infected intestine by scanning eleetron microscopy showed extensive destruction of the mucosal folds of the posterior intestine. Western blotting and indirect fluorescent antibody techniques were used to investigate the immunologieal component of the host response. No antibodies specific for C. shasta were detected by either method.

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Section: Introductionmentioning

confidence: 84%

Characterization of a host response to the myxosporean parasite, Ceratomyxa shasta (Noble), by histology, scanning electron microscopy and immunological techniques

Bartholomew

Smith

Rohovec

et al. 1989

Journal of Fish Diseases

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“…(iii) Disintegration of the fins (Havelka & Volf, 1970). (iv) Opercular cysts (Taylor & Haber, 1974). The symptomatology of epizootics varies.…”

Section: Sy Mptomatologymentioning

confidence: 99%

“…Osteogenesis is disrupted and irregular bone fcrmation producing permanent deformities can result. The main reaction to the infection is the production of granulation tissue (Hoffman et al, 1962;Lucky, 1970;Taylor & Haber, 1974). Lucky (1970) concluded the tissue response was dependent on the site of infection.…”

Section: Histopathologymentioning

confidence: 99%

The biology of Myxosoma cerebralis: the causative organism of whirling disease of salmonids

Halliday

1976

Journal of Fish Biology

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“…They pointed out that the changes described by Kudo (1929) caused by Henneguya exilis in the gills of Ictalurus punctatus were typical of an inflammatory response, although this had not been recognized by Kudo himself. In recent papers on myxosporidian infections, descriptions of histopathological changes are rare. Taylor & Haber (1974) reported granulomas formation in a rare example of opercular cyst formation in trout infected with Myxosoma cerebralis. Greven (1956) has perpetuated the claim that myxosporidia induce no host responses in gill tissue: the material she studied included H .…”

Section: Introductionmentioning

confidence: 98%

Histopathological changes in fish gills infected with myxosporidian parasites of the genus Henneguya

Dyková

Lom

1978

Journal of Fish Biology

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Tissue reaction to invasion by two Henneguya species was studied in gills of three species of fish. Henneguya psorospermica and Henneguya creplini develop in secondary lamellar arterioles in perch (Perca Buviatilis) and ruff (Acerina cernua). In pike (Esox lucius), H. psorosperrnica develops in the artery. During the growth of the vegetative stage, the gill tissue may undergo local atrophy or hyperplasia of the epithelium and displacement and disfiguration of the lamellae. After the myxosporidian cyst, surrounded by a host tissue capsule has reached maturity and contains fully-formed spores, an inflammatory reaction may set in which reduces the cyst to granulomatous tissue. This inflammatory process is essentially of the same type as that observed in mammals. There is evidence that inflammatory responses are of regular occurrence in the final stages of most myxosporidian infections. Transfer from low to room temperature provokes a rapid elimination of the cysts by granulomatous inflammation.

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OPERCULAR CYST FORMATION IN TROUT INFECTED WITH Myxosoma cerebralis

Cited by 10 publications

References 0 publications

Characterization of a host response to the myxosporean parasite, Ceratomyxa shasta (Noble), by histology, scanning electron microscopy and immunological techniques

Characterization of a host response to the myxosporean parasite, Ceratomyxa shasta (Noble), by histology, scanning electron microscopy and immunological techniques

The biology of Myxosoma cerebralis: the causative organism of whirling disease of salmonids

Histopathological changes in fish gills infected with myxosporidian parasites of the genus Henneguya

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