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Capillaria philippinensis
''Capillaria philippinensis'' is a parasitic nematode which causes intestinal capillariasis. This sometimes fatal disease was first discovered in Northern Luzon, Philippines in 1964. Cases have also been reported from China, Egypt, Indonesia, Iran, Japan, Korea, Lao PDR, Taiwan and Thailand.〔 〕 Cases diagnosed in Italy and Spain were believed to be acquired abroad, with one case possibly contracted in Colombia. The natural life cycle of ''C. philippinensis'' is believed to involve fish as intermediate hosts, and fish-eating birds as definitive hosts. Humans acquire ''C. philippinensis'' by eating small species of infested fish whole and raw.
==Discovery and nomenclature==
Between the first case reported in 1964 and the end of 1967, more than 1000 cases were documented in and around Northern Luzon, including 77 deaths. Witch doctors were hired by the locals to exorcise the curse placed on them by the river god, which they believed was responsible for this sudden disaster.
In 1968, the cause was identified as ''Capillaria philippinensis''. Adult ''C. philippinensis'' are very small, with males measuring 1.5-3.9 mm long and 23-28 µm maximum width, while adult females are 2.3-5.3 mm long and 29-47 µm maximum width. Eggs measure 36-45 µm long and 20 µm wide, and are described as peanut-shaped with a striated shell.
This species has been transferred to the genus ''Aonchotheca'', as ''Aonchotheca philippinensis'', and to the genus ''Paracapillaria'', as ''Paracapillaria philippinensis''. However, this species is almost universally referred to as ''Capillaria philippinensis'' in the current medical literature.
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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