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Flea, the common name for the order Siphonaptera, includes 2,500 species of small flightless insects that live as external parasites of mammals and birds. Fleas live by ingesting the blood of their hosts.
5 de jun. de 2024 · Fleas are small, wingless insects with a tough cuticle bearing many bristles and frequently combs (ctenidia) of broad, flattened spines. The adult flea varies from about 0.1 to 0.32 cm (0.039 to 0.13 inch) in length and feeds exclusively on the blood of mammals (including humans) and birds.
Many species of fleas can feed on humans. The human flea, Pulex irritans, is less-commonly seen these in industrialized areas. This species is not an effective vector of disease but can serve as an intermediate host for the cestodes Dipylidium caninum and Hymenolepis nana.
The human flea (Pulex irritans) – once also called the house flea – is a cosmopolitan flea species that has, in spite of the common name, a wide host spectrum. It is one of six species in the genus Pulex; the other five are all confined to the Nearctic and Neotropical realms.
15 de dic. de 2023 · The three most important flea species, in terms of global public health and veterinary relevance, are the house flea (Pulex irritans), the oriental rat flea (Xenopsylla cheopis), and the cat flea (Ctenocephalides felis).
15 de may. de 2024 · Key points. Fleas are small insects that survive by feeding on animal or human blood. Their bites can cause discomfort, itchiness, and irritation. Sometimes, fleas can infect people or pets with the germs that cause flea-borne typhus, plague, or cat scratch disease.
There are an estimated 2,000 species of fleas worldwide, and more than 300 types are found in the United States. The cat flea, Ctenocephalides felis, is the most common domestic flea. Other kinds of fleas include dog fleas, human fleas and rat fleas.
