• Parasites, Hosts and Diseases
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• 제55권3호
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• pp.247-254
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• 2017

ELISA has been used for the diagnosis of toxoplasmosis, but it is being gradually replaced by a rapid diagnostic test (RDT). We compared and analyzed ELISA and RDT results using the sera collected during 4 consecutive years from residents of Gyodong-do (Island), Incheon-city, Korea. Sera from 921, 993, 940, and 838 adult residents were collected on a yearly basis (2010-2013). ELISA was performed by using a crude extract of T. gondii RH strain antigen and IgG/IgM RDT mounted with recombinant fragment of major surface antigen (SAG1), GST-linker-SAG1A, were applied to the sera. Comparison between groups was analyzed by the Student's t-test. The positive seroprevalence surged from 14.7% (135/921, 2010), 23.1% (231/993, 2011), 23.6% (222/940, 2012), and 32.1% (269/838, 2013) by ELISA. In contrast, RDT showed a more moderate increasing trend from 21.7% (200/921, 2010), 25.5% (253/993, 2011), 28.9% (272/940, 2012) and 33.1% (277/838, 2013). Discrepancies between ELISA and RDT were noted near the cut-off value. At the OD 0.15-0.24 range, RDT could detect 16.1% (169/1051) more positives, which suggests an early or acute toxoplasmosis, but at the OD 0.25-0.34 range, ELISA could detect 35.9% (92/256) more positives of possible chronic infections. Over the OD > 0.35 ELISA and RDT agreed in the majority of the cases. This surge in seroprevalence may be caused by the organic agriculture in addition to eating behavior or increase in pets among Koreans. These facts may be applied on a full-scale national survey using RDT to supplement ELISA to define the characteristics of the infection.

• Journal of Species Research
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• 제2권2호
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• pp.203-222
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• 2013

The district of Ganghwa-gun in the western coast (Seohae) of the Korea is consisted of several islands, Ganghwa-do, Seokmo-do, Gyodong-do, Jumun-do, Boreum-do, Seogeom-do and Donggeom-do. Since several islands of them were connected to mainland of Korea by bridges, the islands attract a lot of tourists from Seoul, Incheon and Gyeonggi-do areas. Construction of new roads, pensions, resort areas and restaurants provided economical benefits to local residents while natural vegetation of these islands has deteriorated continuously. Before biodiversity of vascular plants in these regions is damaged seriously by human impacts, it is needed to conserve original vegetation of the islands for restoration and monitoring in the future. Therefore, the primary purpose of the study is to clarify the flora of Donggeom-do, belonging to Ganghwa-gun. From the 15 times of field trips to the island, we have collected a number of vascular plants, 512 taxa in total, including 110 families, 329 genera, 449 species, six subspecies, 52 varieties, four forms and one hybrid. Of 512 taxa investigated, we have identified 12 taxa to be endemic to Korea. Six taxa were endangered or rare species which were designated by the Ministry of Environment and Korea Forest Service, respectively. 25 taxa were recognized as floristic regional indicator species designated specially by the Ministry of Environment. Seven species have shown their northern or southern distributional limit ranges, and 29 taxa were recognized as halophytes. The naturalized plants were identified as 55 taxa, and their naturalization ratio was 10.7%.

• 한국응용곤충학회지
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• 제47권2호
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• pp.111-115
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• 2008

본 실험은 월동 전후 물장군 개체군의 형태적 차이를 구명하고자 경기도 교동도에서 채집된 월동 전후 관계가 명확한 성충 개체들(월동 전후 개체군)과 실험실에서 사육으로 얻은 성충 개체들(사육개체군)을 대조군으로 이용하여 일반적인 외부형태를 비교 관찰하였다. 관찰의 결과, 월동 전후 개체군간의 외부구조에 있어서의 근본적인 차이는 발견되지 않았으나, 앞다리 밑마디의 연결 부위에 위치한 앞가슴 배면의 가장자리와 앞다리 넓적마디의 종아리마디 연결 부위는 월동 후 개체군에서 크게 마모되어 있었다. 또한 월동 전 개체군에서는 가운데 다리 발톱 길이가 2번째 발목마디의 1/2이상이었으나, 월동 후 개체군에서는 1/2미만이었다. 반날개(hemelytra)로 되어 있는 물장군 앞날개 막질부분의 가장자리는 월동 후 개체군에서 크게 찢겨 마모되었고, 날개와 마찰이 일어나는 배마디 등면 중 5번째 배마디 표면의 털의 수가 월동 후 개체군에서 현저히 감소하였다.