Mite infestation during grain storage is also a common occurrence. Storage mites are extremely small but widely distributed. These insects are of increasing concern with reported allergenic effects to humans and well-documented detrimental effects to livestock causing loss of nutritional quality and reduction of palatability. Mites can cause dermatitis, digestive and respiratory disorders in farm animals and humans. Mites act as carriers of mycotoxins, mould spores and bacteria such Salmonella, and their faecal material can be utilized as a food source by moulds.