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The dog flea (''Ctenocephalides canis'') is a species of flea that lives as an ectoparasite on a wide variety of mammals, particularly the domestic dog and cat. It closely resembles the cat flea, ''Ctenophalides felis'', which can live on a wider range of animals and is generally more prevalent worldwide. The dog flea is troublesome because it can spread ''Dipylidium caninum''. Although they feed on the blood of dogs and cats, they sometimes bite humans. They can live without food for several months, but females must have a blood meal before they can produce eggs. They can deliver about 4000 eggs on the host's fur.〔(【引用サイトリンク】title=Dog flea (Ctenocephalides canis) )〕 The eggs go through four lifecycle stages: embryo, larva, pupa, and imago (adult). This whole life cycle from egg to adult takes from two to three weeks, although this depends on the temperature. It may take longer in cool conditions.〔(【引用サイトリンク】title=Order Siphonaptera - Fleas )〕 ==Anatomy== The dog flea's mouthparts are adapted for piercing skin and sucking blood. Dog fleas are external parasites, living by hematophagy off the blood of dogs. The dog often experiences severe itching in all areas where the fleas may reside. Fleas do not have wings and their hard bodies are compressed laterally and have hairs and spines, which makes it easy for them to travel through hair. They have relatively long hind legs for jumping.〔 The dog flea can be distinguished from the very similar cat flea by its head, which is anteriorly rounded rather than elongate, and the tibiae of its hind legs, which exhibit eight setae-bearing notches rather than six. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dog flea」の詳細全文を読む スポンサード リンク
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