The objective of this study was to quantify and determine the periodicity in the release of the triactinomyxon (TAM) stage of Myxobolus cerebralis, the causative agent of salmonid whirling disease, by its aquatic oligochaete host Tubifex tubifex. For this, 24 individual T. tubifex (infected as a group at 15 C) were examined daily for the release of M. cerebralis TAMs, and the number of waterbor...

Myxobolus cerebralis is the causative agent of whirling disease in salmonid fishes. In 2016, this invasive parasite was detected Alberta, Canada, for first time, initiating a comprehensive 3 yr monitoring program to assess where had spread within province. As part program, qPCR-based test developed facilitate detection environmental stages M. and from oligochaete host, Tubifex tubifex. During ~...

M. cerebralis is the parasite causing whirling disease, which has dramatic ecological impacts due to its potential cause high mortality in salmonids. The large-scale efforts, necessary underpin an effective surveillance program, have practical and economic constraints. There is, hence, a clear need for models that can predict spread. Model development, however, often heavily depends on knowing in...

Little is known about the viability of myxozoan actinospore stages after harvest from laboratory cultures of infected oligochaete worms. The viability and reactivity of actinospores of three myxozoan species was evaluated after short-term storage at 4 degrees C and 12 degrees C. Two methods of determining actinospore viability were compared: differential fluorescent staining and direct microsco...

The present communication describes three new species of myxosporeans (Myxozoa: Myxosporea: Bivalvulida), Myxobilatus odontamblyopusi sp. n., Myxobolus catmrigalae sp. n. and M. buccoroofus sp. n. from Odontamblyopus rubicundus (HamiltonBuchanan), Catla-Mrigal hybrid carp [male parent fish Catla catla (Hamilton-Buchanan) × female parent fish Cirrhinus mrigala (Hamilton-Buchanan)] and Labeo bata...

Since morphological identification of a larval Taeniid in geladas (Theropithecus gelada) has produced inconsistent results, genetic information is pivotal for species identification. Nuclear and mitochondrial DNA from a coenurus in a wild gelada were compared to published sequences from multiple Taeniid species, confirming the identification of this parasite as Taenia serialis. A demographic an...

A new highly pathogenic muscle-infecting species of the genus Myxobolus Bütschli, 1882 is described from the Prussian carp, Carassius gibelio (Bloch, 1782) using spore morphology and SSU rDNA sequence data. Phylogenetic analyses elucidated relationship of the newly described Myxobolus lentisuturalis to other Myxobolus species and supported its position of an independent species.