 Parasitic, viral and fungal infections are all disseminated when the fish are stressed and the centres are too close together, and a spokesman for Marine Harvest recognized that his company was using too many antibiotics in Chile and that fish pens were too close, contributing to the dissemination of the ISA virus.Norwegian scientist Are Nylund has suggested that Marine Harvest introduced the ISA virus to the region by importing infected eggs from Norway.In January 2017 "Private Eye" reported that Mowi had been depositing large quantities of the insecticide azamethiphos into Scottish waters to control sea lice in salmon.