What question did this study set out to answer?

To identify the alternate invertebrate host and actinosporean life stage of Ceratomyxa shasta, a myxosporean parasite of salmonid fishes.

October 1, 1997Journal of ParasitologyOpen Access

The Life Cycle of Ceratomyxa shasta, a Myxosporean Parasite of Salmonids, Requires a Freshwater Polychaete as an Alternate Host

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To identify the alternate invertebrate host and actinosporean life stage of Ceratomyxa shasta, a myxosporean parasite of salmonid fishes.
Conducted laboratory transmission trials exposing susceptible salmonids to water containing or force-feeding them the freshwater polychaete Manayunkia speciosa infected with actinosporeans.
Performed polymerase chain reaction (PCR) amplification and sequencing using primers targeting the C. shasta 18S rDNA sequence to verify parasite transmission.
Conducted ultrastructural examination of actinosporean developmental stages inside infected polychaetes.
Susceptible salmonids developed C. shasta infections after being exposed to or force-fed M. speciosa harboring the actinosporean stage.
PCR amplification and 18S rDNA sequencing confirmed genetic homology between actinosporeans in infected polychaetes and C. shasta spores from fish, with no amplification in uninfected worms.
Ultrastructural analysis revealed that actinosporean development takes place within the polychaete epidermis rather than the intestinal epithelium.

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Implication

Laboratory study uncovers the freshwater polychaete Manayunkia speciosa as the alternate host for Ceratomyxa shasta in salmonids, indicating a two-host life cycle for this parasite.

Cite This Study

Bartholomew et al. (1997) studied this question.

synapsesocial.com/papers/6a8a52ac3f4fe8ec692e50b8 https://doi.org/10.2307/3284281

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Implication

Laboratory study uncovers the freshwater polychaete Manayunkia speciosa as the alternate host for Ceratomyxa shasta in salmonids, indicating a two-host life cycle for this parasite.

The Life Cycle of Ceratomyxa shasta, a Myxosporean Parasite of Salmonids, Requires a Freshwater Polychaete as an Alternate Host

Key Points

Discussion

Implication

Cite This Study

The Life Cycle of Ceratomyxa shasta, a Myxosporean Parasite of Salmonids, Requires a Freshwater Polychaete as an Alternate Host

Key Points

Discussion

Implication

Cite This Study

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