Tetracapsuloides bryosalmonae is the causative agent of proliferative kidney disease (PKD), a major temperature-sensitive disease affecting wild and farmed salmonids. It is a microscopic endoparasite belonging to the subphylum Myxozoa, a lineage of highly reduced cnidarians. The parasite has a two-host life cycle, alternating between freshwater bryozoans and salmonid fish. In bryozoans, it proliferates and forms sacs where sporogenesis occurs. Spores released into the water infect fish, where the parasite proliferates in the vascular system and internal organs, predominantly in the kidney.

The present study identified an undescribed myxozoan parasite species infecting Hoplias malabaricus specimens collected from the Arari River, in the municipality of Cachoeira do Arari in the state of Pará, northern Brazil. Thirty specimens were necropsied to search for microparasite, and when plasmodium found, material was collected for analysis via light microscopy, histology and molecular biology methodologies. Macroscopic plasmodium was observed in the gills of 30% of the examined specimens....

Pozostałe wpisy z tej serii: Część 1. Prolog Część 2. Pierwsza wielka schizma w królestwie zwierząt Część 3. Myxozoa, czyli ewolucja na biegu wstecznym Część 5. Ediakar, czyli świat prototypów Patrz też: Płaskowce, czyli zalety prostoty (autor: Łukasz Sobala) W tradycyjnej klasyfikacji...

Myxobolus branchiostegi sp. nov. was detected in the gallbladder of six out of 28 specimens (21.4%) of Branchiostegus argentatus Cuvier, 1830 from the East China Sea. This is the first record of a Myx...