Mites are widely distributed around the world and have a wide variety of species.

Gamasid mites are mostly parasitic on the body surface and nests of mice, birds and poultry, and spread with the movement and flight of the host.

Chigger mites are mainly bred in weedy places such as hidden, moist mountain slopes and canyons with lush vegetation and deserted fields, and are blown by the wind.

Typha mites parasitized on the body surface of butterfly moth insects and Chinese medicinal materials and packaging products inhabited by butterfly moth.

Dust mites are scattered in the corner dust of factories, warehouses and living rooms, feeding on dander, Chinese medicine powder and mold.

Acarid mites breed in grains, dried fruits, sugars, starches, honey and Chinese medicinal materials rich in sugars and starches, and can spread with the production, circulation and application of drugs.

Demodex is parasitic in human and mammal hair follicles, sebaceous glands and other tissues.

Sarcoptes scabies mostly live in the epidermis of the skin.

The above types of mites are widely spread due to rampant rodent infestations, manual production of products or commodity circulation.