1. Mites

3. Differentiation of ticks and mites ticks mites
Large, macroscopic
Small, microscopic
Body with short or no hair
Body with long hair
Hypostome exposed and armed with teeth
Hypostome hidden, unarmed (no teeth)
All parasitic
Some are parasites of plants and animals

4. Mites and diseases I. Direct harm:
Itch mite: Sarcoptes scabiei var. hominis
Follicle mite:
Demodex folliculor 毛囊蠕形螨
D. brevis 皮脂蠕形螨
Dust mite: contain allergens causing asthmatic symptoms

5. 毛囊蠕形螨雌（含卵）雄成虫

6. 皮脂蠕形螨成虫

7. House Dust Mite - Dermatophagoides sp.
House dust mites live in our homes and feed on the microbes that grow on cast skin flakes, hair, and other detritus. The average pillow is reputed to be home to 10,000 dust mites, house dust mites are the most important source of allergens in house dust. Severe allergies, rhinitis, eczema (skin inflammation), and asthma (respiratory disorder) are induced by the allergens these mites produce and affect million people worldwide.

8. House Dust Mite - Dermatophagoides sp.

9. Control of dust mite
Like most of the tiny organisms that share our homes, dust mites are less troubling if their population levels remain low. Reducing the humidity in the home (e.g. increased ventilation, air conditioning) and removing upholstered furniture, carpets and other household items that accumulate skin flakes and retain humidity are good first steps in the control of dust mite populations.

10. Transmission of disease
1. Jungle encephalitis (virus)
2. Epidemic hemorrhagic fever (virus)
3. Q fever (rickettsia)
4. Endemic typhus
5. Scrub typhus (rickettsia)

11. Bulbous Carmine Mite

12. Boxmite

13. Cepheidae, nymph

14. Scrub itch mite or chigger

15. Cosmochthonius

16. Cosmochthonius sp.2

17. House Dust Mite - Dermatophagoides sp.

18. Evimirus

19. Feather mite

20. Jumping mite

21. Mesostigmata

22. Lamington Red Velvet Mite

23. Walter's redlegged mite

24. Phoretic Uropodid Deutonymphs

25. Nesopelops nymph

26. Polyaspis

27. Mesostigmata, Promegistidae

28. Schizotetranychus sp., female (left) and male (right)

29. Nanorchestid mites

30. Terpnacarus

31. Peacock mites

32. Turtle Mite

33. Whitefly with phoretic broad mites

34. Martian Wink
This structure, is the genital opening of a terrestrial parasitengone mite and the three oval structures are the genital papillae.

35. Male Australian Paralysis Tick