Immunity in rainbow trout, Oncorhynchus mykiss, against the monogenean Discocotyle sagittata following primary infection

@article{RubioGodoy2003ImmunityIR,
  title={Immunity in rainbow trout, Oncorhynchus mykiss, against the monogenean Discocotyle sagittata following primary infection},
  author={Miguel Rubio-Godoy and Richard C. Tinsley},
  journal={Parasitology Research},
  year={2003},
  volume={92},
  pages={367-374}
}
Rainbow trout (Oncorhynchus mykiss) were experimentally infected by continuous or single exposure with the monogenean Discocotyle sagittata. To determine whether immunity follows primary infection, fish were exposed to a secondary challenge by one of two modes: (1) primary infections were cleared with praziquantel (PZQ) and hosts re-infected with 100 oncomiracidia; (2) parasites were allowed to reach maturity and hosts super-infected with 100 oncomiracidia. Fish challenged after initial… 

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References

SHOWING 1-10 OF 37 REFERENCES

Immunization of rainbow trout Oncorhynchus mykiss against Discocotyle sagiffata (Monogenea).

TLDR
Overall, a significant negative correlation was found between antibody titres and worm burdens, suggesting immunoglobulins are implicated in mediating partial immunity and cannot be excluded that antibodies could be involved in mediates the observed partial immunity.

Acquired resistance in rainbow trout against Gyrodactylus derjavini

TLDR
Investigation of the host response in rainbow trout and the associated changes in mucous cell density during infection with the skin monogenean Gyrodactylus derjavini indicates differences between host responses to G. derJavini compared to responses against other pathogens.

Trickle and single infection with Discocotyle sagittata (Monogenea: Polyopisthocotylea): effect of exposure mode on parasite abundance and development.

Experimental infection of rainbow trout Oncorhynchus mykiss (Walbaum) with the monogenean Discocotyle sagittata (Leuckart, 1842) allowed comparison between trickle and single exposure, two infection

The host specificity of Gyrodactylus salaris Malmberg (Platyhelminthes, Monogenea): susceptibility of Oncovhynchus mykiss (Walbaum) under experimental conditions

TLDR
Rainbow trout was a suitable host for G. salaris, capable of transmitting the parasite to new localities as a consequence of stocking programmes or migratory behaviour and Parasite aggregation was also shown to be an important factor in the outcome of the host-parasite association.

Acquired protection against Neobenedenia girellae in Japanese flounder.

TLDR
The immune response of Japanese flounder against Neobenedenia girellae was investigated and results indicate that the protection induced by the previous infection was not associated with the humoral antibody.

Gyrodactylus derjavini infection elicits IL-1beta expression in rainbow trout skin.

Binding and lethal effect of complement from Oncorhynchus mykiss on Gyrodactylus derjavini (Platyhelminthes: Monogenea).

TLDR
The antibody-independent plasma effect on the gyrodactylids are ascribed to the alternative complement pathway, and it is suggested that some carbohydrate epitopes on the parasites are involved in the C3 activation.

Parasitic disease in amphibians: control by the regulation of worm burdens

TLDR
While factorial experiments can demonstrate the potential of helminths to cause significant disease and mortality in anuran host-macroparasite interactions, powerful post-invasion regulation of worm burdens appears to exert a strong control of parasite-induced disease in natural host populations.

Killing of Gyrodactylus salaris (Platyhelminthes, Monogenea) mediated by host complement.

TLDR
Observations suggest that killing is due to the complement system of the host, acting via the alternate pathway, and the role of complement in the protection of fishes against gyrodactylid infection therefore deserves further investigation.