| 翻訳と辞書 |
stylostome
The stylostome is a funnel or channel-like structure formed by trombiculid mites. The formation is not caused by the mouthparts of the mites, because these mites do not have needle-like mouthparts as other hematophagous animals have been known to have, but have chelicerae, which only pierce the skin. The tube is formed by the digestive enzymes in the saliva, which is the same salivary secretions that break down cells that is causing the surrounding tissue to harden. As the mite feeds longer, the saliva seeps farther down, and digesting more tissue, therefore causes the stylosome to penetrate to lower layers of skin.
== Transmission of Disease ==
Normally, the bite mark causes local swelling or welts, but in more serious cases cause dermatitis. Though the mite can be infected with a disease called scrub typhus in Asia and the Pacific by carrying saliva directly to the blood stream, but mites in North America have not been known to transmit Lyme disease, Rocky Mountain spotted fever, tularemia or any other disease. See Mites of livestock for a photograph of a trombiculid with its stlyostome.
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「stylostome」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|