Flea
Flea
Flea (/fliː/), from the Old English flēah, is a small, wingless insect that belongs to the order Siphonaptera. Fleas are external parasites that feed on the blood of mammals and birds.
Etymology
The term "flea" comes from the Old English flēah and is related to the Old Norse fló, both meaning 'flea'. This term is also linked to the Dutch vlo, German floh, and the Swedish loppa.
Description
Fleas are small insects, typically 2 to 3 mm long, with bodies that are narrow and flattened, allowing for easy movement through the fur or feathers of their host. They are wingless but have strong hind legs adapted for jumping. Fleas are known for their extraordinary jumping abilities, being able to jump distances many times their body length.
Life Cycle
The life cycle of a flea consists of four stages: egg, larva, pupa, and adult. The entire life cycle can take anywhere from a couple of weeks to several months, depending on the environmental conditions.
Fleas and Disease
Fleas are not just a nuisance; they can also transmit diseases. The most notorious of these is the bubonic plague, which was spread by fleas that infested rats. Fleas can also transmit other diseases such as typhus, tungiasis, and cat scratch disease.
Control
Control of fleas is important for both human and animal health. Methods of control include the use of insecticides, growth regulators, and the treatment of pets with flea control products. Regular cleaning and vacuuming of homes can also help to control flea populations.
Related Terms
External links
- Medical encyclopedia article on Flea
- Wikipedia's article - Flea
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