Modelling management strategies for a disease including undetected sub-clinical infection: Bacterial kidney disease in Scottish salmon and trout farms

► Pathogens can be spread by movement between farms of subclinically infected animals. ► In salmonid fish the bacterial kidney disease's (BKD) pathogen can also be subclinical. ► An S-I model splits infected farms as: known and unknown subclinical and diseased. ► Control strategies are evaluated under imperfect knowledge of subclinical infection. ► Response of BKD to control strategies is very different for salmon and trout farms.