MITES
- Minute
arachnids related to the
ticks.
Any of about 20,000 species of tiny arthropod invertebrates belonging to the subclass Acari, sometimes Acarina, or Acarida
- of the class Arachnida.
Mites live in varied habitats: in brackish water, in fresh water, in hot springs, in soil, on plants, and as parasites on and in animals. Parasitic forms may live in the nasal passages, lungs, stomach, or deeper body tissues of animals. Some mites are carriers of human and animal diseases. Plant-feeding mites cause damage by feeding on leaf tissues or by transmitting viral diseases.
Mites are small, often microscopic in size—the smallest being about 0.1 mm (0.004 inch)
in length and the largest being about 6 mm (0.25 inch)—and they usually have four pairs of legs. In general, they breathe by means of tracheae, or air tubes; in many species, however, respiration takes place through the
skin.
Some mites are
free-living scavengers or predators. Some
are parasitic, such as the itch mite
- Sarcoptes scabiei, which burrows
into skin, causing scabies in humans and
mange in dogs, and the red mite -
Dermanyssus gallinae, which sucks blood
from poultry and other birds.
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