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Myxobolus cerebralis: Quiz


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Question 1: [2] In less severe infections the most common test involves digestion of the cranial cartilage with the proteases ________ and trypsin (the pepsin-trypsin digestā€”PTD) before looking for spores.

Question 2: Firstly, this sporoplasm undergoes mitosis to produce more ________ cells, which migrate into deeper tissue layers, in order to reach the cerebral cartilage.

Question 3: ________, the most susceptible species to this parasite, are not native to Europe; successfully reproducing feral populations are rare, so there are few wild rainbow trout that are young enough to be susceptible to infection.
Coho salmonChinook salmonRainbow troutAtlantic salmon

Question 4: [2] For example, one study showed that feeding Fumagillin to ________ reduced the number of infected fish from between 73% and 100% to between 10% and 20%.
Chinook salmonRainbow troutAtlantic salmonCoho salmon

Question 5: Parasite identity can also be confirmed using the polymerase chain reaction to amplify the 415 base pair 18S rRNA ________ from M. cerebralis.

Question 6: Today, the myxozoans, previously thought to be multicellular protozoans are considered ________ by many scientists, though their status has not officially changed.

Question 7: This cell multiplies, producing many ________ cells by an asexual cell fission process called merogony.

Question 8: Serological identification of spores in tissue sections using an ________ raised against the spores is also possible.
AntibodyAdaptive immune systemImmune systemAutoantibody

Question 9: [19] An important indirect effect of the parasites presence is quarantine restriction placed on ________ of salmon products to Australia.
TradeExportEconomicsInternational trade

Question 10: Fish "whirl" forward in an awkward corkscrew-like pattern instead of swimming normally, find feeding difficult, and are more vulnerable to ________.
Apex predatorPredationHerbivoreCarnivore


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