A Case of Diphyllobothrium nihonkaiense Infection as Confirmed by Mitochondrial COX1 Gene Sequence Analysis
2013
Park, S.H., Chuncheon Sacred Heart Hospital, Chuncheon, Republic of Korea. | Eom, K.S., Chungbuk National University, Cheongju, Republic of Korea. | Park, M.S., Chuncheon Sacred Heart Hospital, Chuncheon, Republic of Korea. | Kwon, O.K., Chuncheon Sacred Heart Hospital, Chuncheon, Republic of Korea. | Kim, H.S., Chuncheon Sacred Heart Hospital, Chuncheon, Republic of Korea. | Yoon, J.H., Chuncheon Sacred Heart Hospital, Chuncheon, Republic of Korea.
Diphyllobothrium nihonkaiense has been reported in Korea as Diphyllobothrium latum because of their close morphologic resemblance. We have identified a human case of D. nihonkaiense infection using the mitochondrial cytochrome c oxidase subunit I (cox1) gene sequence analysis. On 18 February 2012, a patient who had consumed raw fish a month earlier visited our outpatient clinic with a long tapeworm parasite excreted in the feces. The body of the segmented worm was 2 m long and divided into the scolex (head) and proglottids. It was morphologically close to D. nihonkaiense and D. latum. The cox1 gene analysis showed 99.4% (340/342 bp) homology with D. nihonkaiense but only 91.8% (314/342 bp) homology with D. latum. The present study suggested that the Diphyllobothrium spp. infection in Korea should be analyzed with specific DNA sequence for an accurate species identification.
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