The polar capsule discharges a polar filament that is used by the infective stage to attach to a fish host. Research on cnidae could provide insight into ways to prematurely discharge the polar filament, thus preventing infection. A literature review has been conducted and testing of possible discharge agents is underway. The viability of the actinospore stages of Myxobolus cerebralis will be tested using vital staining with fluorescent dyes. The effects of water quality variables such as pH, salinity, hardness, and dissolved oxygen on viability have also been evaluated at two temperatures.
Further work is planned to look at the effects of electricity and sonication on viability.
This parasite is a close relative of M. cerebralis , but little is known about its pathogenicity and life history. It is found in the brain and spinal cord of salmonid fishes of the Logan and possibly the Provo rivers. Tests will be conducted to determine the life cycle of M. neurobius . Population Estimates Population estimates will be conducted in certain waters where whirling disease has been found. This should provide some information about its effects on Utah salmonid populations.