At MAISRC, field and laboratory research is underway to estimate the prevalence of the disease in important fish populations, the effect that it has on the endurance and fitness of the host, and potential long-term and seasonal infection variability. Click here to learn more about Heterosporis and its impacts.

Key findings and accomplishments

  • Formally named and described the appearance, genetics, and pathology of Heterosporis sutherlandae, the causative agent of Heterosporosis
  • Validated a highly sensitive and specific molecular diagnostic assay
  • Developed an infection model to understand the disease over time in live fish
  • Conducted surveys of Minnesota fish populations to estimate current distribution and species affected and identify long-term and seasonal infection variability
  • Despite early outbreaks from 2000 to 2005, found that Heterosporosisis is now relatively rare in Minnesota among species, seasons, and lakes investigated
  • Created a population model that determined heterosporis may have short-term impacts on yellow perch harvest, but long-term impacts are unlikely