Responses to pathogen exposure in sentinel juvenile fall-run Chinook salmon in the Sacramento River, CA.

ABSTRACT: This study investigated how the deployment of juvenile Chinook salmon in ambient river conditions and the subsequent exposure to and infection by pathogens was associated with the changes in the expression of genes involved in immune system functioning, general stress and host development. Juvenile fish were deployed in sentinel cages for 21 days in the Sacramento River, CA, USA. Gill, kidney and intestinal tissue were sampled at 0, 7, 14 and 21 days post-deployment. Pathogen detection and host response were assessed by a combination of molecular and histopathological evaluation. Our findings showed that fish became infected by the parasites Ceratonova shasta, Parvicapsula minibicornis and Ichthyophthirius multifiliis, and to a lesser extent, the bacteria Flavobacte

SUBMITTER: Abdelrazek SMR 

PROVIDER: S-EPMC10465009 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature