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Myxozoa (etymology: Greek: μύξα myxa "slime" or "mucus" [2] + thematic vowel o + ζῷον zoon "animal" [3]) is a subphylum of aquatic cnidarian animals – all obligate parasites. It contains the smallest animals ever known to have lived.
Myxosporea is a class of microscopic animals, all of whom are parasites.They belong to the Myxozoa clade within Cnidaria.They have a complex life cycle that comprises vegetative forms in two hosts—one an aquatic invertebrate (generally an annelid but sometimes a bryozoan) and the other an ectothermic vertebrate, usually a fish.
[citation needed] Later, the organisms previously called Triactinomyxon dubium and T. gyrosalmo (class Actinosporea) were found to be, in fact, triactinomyxon stages of M. cerebralis, the life cycle of which was expanded to include the triactinomyxon stage. Similarly, other actinosporeans were folded into the life cycles of various myxosporeans.
Kudoa is a genus of Myxozoa and the only genus recognized within the monotypic family Kudoidae. There are approximately 100 species of Kudoa all of which parasitize on marine and estuarine fish. [1] Kudoa are most commonly known and studied for the negative effects the genus has on commercial fishing and aquaculture industries. [2]
Tetracapsuloides bryosalmonae, the only representative of the group whose life cycle is well studied, causes proliferative disease of the kidneys in salmonids. Two stages of the life cycles of the two species in the genus Buddenbrockia are known. One of them is a saccular stage, similar to Tetracapsuloides.
The parasite is then carried in the salmon until the next spawning cycle. The myxosporean parasite that causes whirling disease in trout has a similar life cycle. [ 2 ] However, as opposed to whirling disease, the Henneguya infestation does not appear to cause significant incapacitation of the host salmon — even heavily infected fish tend to ...
Enteromyxum leei was formerly described as Myxidium leei, [4] and initially reported in cultured gilthead sea bream (GSB) (Sparus aurata) from southern Cyprus.The morphology of the myxospores of this parasite differ slightly from others of the family Myxiidae: the polar capsules are located terminally and are elongated rather than subspherical (as in Myxidium), but they open to one side and ...
The life cycle of T. kitauei involves two hosts. Branchiura sowerbyi (Oligochaeta, Naididae, Branchiurinae) is the definitive host, in which actinosporean spores of the aurantiactinomyxon type are formed and released from the intestinal tract of the worms. These actinospores then infect the intermediate host, common carp, and after parasite ...