Pathogens are agents that causes disease, especially a living microorganism. They can be a fungus, virus, bacteria, mycoplasmas, nematodes or protozoa or other parasites that attacks other living things. They can be carried by insects, water, air, animals or soil. In the case of sprouts, a grower would be concerned about human pathogens as well as plant pathogens.
You can learn more about Bacteria, Fungi, Parasites and Viruses by browsing our resources below: