한국 연안에서 채집된 자연산 해산어의 아니사키스 유충 감염
Survey of Anisakis spp. infection in wild populations of marine fish caught from coastal areas of Korea
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2007년 3월부터 2008년 2월까지 약 12개월에 걸쳐서 우리나라 동, 서, 남해 연안 지역에서 총 11목 44종 989마리 자연산 해산어류를 대상으로 아니사키스형 유충의 기생상황을 조사하였다. 유충의 감염률은 44종 중 28종에서, 전체 989마리 중 377마리에서 검출되어 평균 38%의 감염률을 보였다. 적출된 유충의 대부분은 형태학적 조사 및 유전학적 조사를 통하여 A. simplex type I 유충으로 동정하였다. 일반적으로 가을∙겨울철보다 봄∙여름철에 감염률이 높았으며, 같은 어종이라도 크기가 큰 개체에서 감염률이 높게 나타났다. 병리조직학적 검사를 통하여 유충의 기생 부위는 어종에 따라서 다르나 대체로 배설강 주변부를 비롯하여 장간막, 간, 복강지방 등 이였으며, 한두 마리씩 산재해 있는 것과 여러 마리가 함께 모여 있는 것, 피낭에 뭉쳐 있는 것 등 다양하게 나타났다
Abstract
Although Anisakis type larvae have been shown to cause various injuries directly or indirectly in humans and animals, the epidemiological studies on these larval infestations are in insufficient state. The status of larval nfestation was investigated in 989 fishes of 44 species, which are inhabiting around the east-westernsouth costal area of Korea during the period from March 2007 to February 2008. The Anisakis type larvaewere infected approximately 38% (377 fishes) in 989 fishes. Most of the worms were identified as Anisakis simplex type I by morphological finding and 18S ribosomal DNA sequence analysis. In the seasonal variations of infestation, most of the fishes showed higher infestation rate during spring and summer, while the fishes such as herring Clupea pallasii did during winter. From the histopathological studies of infested fishes, it has been observed that Anisakis type larvae are harbouring mainly around the intestinal viscera such as liver, pancreas, stomach, pylolic cecum, and cloaca.
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