myxospore | Fish Pathogens

Red spots on belly of rainbow trout caused by the myxozoan parasite Myxobolus squamalis

Host:

rainbow trout

Host tissue:

scales

Photographer / Illustrator:

Stephen Atkinson

Pathogen life stage:

myxospore

Image type:

Regular photograph

Field Locality:

Leaburg Hatchery

Red spots on belly of rainbow trout caused by the myxozoan parasite Myxobolus squamalis

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Diagram showing life cycle of Myxobolus cerebralis, with its 2 hosts and 2 spore stages.

Photographer / Illustrator:

Stephen Atkinson

Pathogen life stage:

myxospore

actinospore

Image type:

Illustration

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Fish liver showing dark red lesions due to C. shasta infection.

Host:

rainbow trout

Host tissue:

liver

Photographer / Illustrator:

Stephen Atkinson

Pathogen life stage:

myxospore

Image type:

Regular photograph

Fish liver showing dark red lesions due to C. shasta infection.

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Fish liver showing pale lesions due to extensive, late-stage C. shasta infection.

Host:

rainbow trout

Host tissue:

liver

Photographer / Illustrator:

Stephen Atkinson

Pathogen life stage:

myxospore

Image type:

Regular photograph

Fish liver showing pale lesions due to C. shasta infection.

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Fish intestine showing swelling and pale lesions due to extensive, late-stage C. shasta infection.

Host:

rainbow trout

Host tissue:

gut / intestine

Photographer / Illustrator:

Stephen Atkinson

Pathogen life stage:

myxospore

Image type:

Regular photograph

Fish intestine showing swelling and pale lesions due to C. shasta infection

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Tubifex worm being placed into tube for M. cerebralis assay.

Host:

Tubifex

Host tissue:

n/a

Photographer / Illustrator:

Sascha Hallett

Pathogen life stage:

myxospore

Image type:

Regular photograph

Tubifex worm being placed into tube for M. cerebralis assay.

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Half-head in tube prior to pepsin-trypsin digest.

Host:

rainbow trout

Host tissue:

head cartilage

Photographer / Illustrator:

Sascha Hallett

Pathogen life stage:

myxospore

Image type:

Regular photograph

Half-head in tube prior to pepsin-trypsin digest.

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Rainbow trout half-head in histology cassette.

Host:

rainbow trout

Host tissue:

head cartilage

Photographer / Illustrator:

Sascha Hallett

Pathogen life stage:

myxospore

Image type:

Regular photograph

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Rainbow trout being sectioned for M. cerebralis detection.

Host:

rainbow trout

Host tissue:

head cartilage

Photographer / Illustrator:

Sascha Hallett

Pathogen life stage:

myxospore

Image type:

Regular photograph

Rainbow trout being sectioned for M. cerebralis detection.

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Cysts of Myxobolus spores in gill filaments.

Host tissue:

gills

Photographer / Illustrator:

Craig Banner

Pathogen life stage:

myxospore

cyst

Image type:

Light Micrograph

Bright Field

Other stain

unstained

Cysts of Myxobolus spores in gill filaments.

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