Crop pollination by migratory beekeeping operations presents a highly concentrated convergence of bees where diseases may be transmitted and spread as hives are transported throughout the US. To test if migratory operations contribute to the spread of disease, we propose an experiment where we subject hives to almond pollination in California and compare their disease loads to stationary hives in N. Carolina. Upon the return of the migratory hives, we will measure subsequent disease spread.