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Ophionyssus natricis
''Ophionyssus natricis'' or Reptile mite is a parasitic mite most commonly found on snakes, but also occurring on captive lizards, turtles, crocodiles and other reptiles.〔http://www.karingalvet.com.au/html/s02_article/article_view.asp?id=196&nav_cat_id=162&nav_top_id=57〕 The parasites feed on snakes, which cause the bodies of the mites to be engorged with blood and fluids from the snake. Once the mites feed by puncturing through the snake skin, the snake usually shows symptoms of irritation and discomfort. Also this provides a point of entry where diseases from ''Aeromonas spp.'' and Inclusion Body Disease (IBD) can be transmitted. Mites have also been shown to act as vectors for IBD. The pathology for disease transmission by the mites is still unknown. Human infestation has been reported.
== Morphology ==
The larvae are pale white. They either stay pale ivory or yellow if unfed in the protonymph stage. The mites will turn a dark red if feeding does occur. After feeding, the mites have a soft body that is dark red or black in color and noticeable legs that can be seen by the human eye during the deutonymph stage.
As adults, male mites are smaller than their female counterparts. The colors can range from dark yellowish-brown, dark red or black depending on the feeding of the mite onto the snake. Female adults, however, are big, fat, and black mites. They weigh 50 μg, but can weigh 750 μg if fully engorged from the blood meal.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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