Myxosporean Parasite (Ceratonova shasta and Parvicapsula minibicornis) Prevalence of Infection in Klamath River Basin Juvenile CHinook Salmon, March-July 2020

Juvenile Klamath River Chinook salmon (Oncorhynchus tshawytscha) were assayed from late March through July 202 by quantitative polymerase chain reaction (QPCR) and histology for myxosporean parasite infection of Ceratonova shasta and Parivcapsula minibicornis.  The annual prevalence of C. shasta infection in 202 by QPCR was 61%.  The majority of fish in 2020 were coinfected with both C. shasta and P. minibicornis.