• Journal of Korean Dental Science
• /
• v.16 no.1
• /
• pp.35-46
• /
• 2023

Purpose: Culture-based methods for microbiological diagnosis and antibiotic susceptibility tests have limitations in the management of orofacial infections. We aimed to profile pus microbiota and identify antibiotic resistance genes (ARGs) using a culture-independent approach. Materials and Methods: Genomic DNA samples extracted from the pus specimens of two patients with orofacial abscesses were subjected to shotgun sequencing on the NovaSeq system. Taxonomic profiling and prediction of ARGs were performed directly from the metagenomic raw reads. Result: Taxonomic profiling revealed obligate anaerobic polymicrobial communities associated with infections of odontogenic origins: the microbial community of Patient 1 consisted of one predominant species (Prevotella oris 74.6%) with 27 minor species, while the sample from Patient 2 contained 3 abundant species (Porphyromonas endodontalis 33.0%; P. oris 31.6%; and Prevotella koreensis 13.4%) with five minor species. A total of 150 and 136 putative ARGs were predicted in the metagenome of each pus sample. The coverage of most predicted ARGs was less than 10%, and only the CfxA2 gene identified in Patient 1 was covered 100%. ARG analysis of the seven assembled genome/metagenome datasets of P. oris revealed that strain C735 carried the CfxA2 gene. Conclusion: A metagenomics-based approach is useful to profile predominantly anaerobic polymicrobial communities but needs further verification for reliable ARG detection.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2020.08a
• /
• pp.26-26
• /
• 2020

Daphne L. (Thymelaceae) comprises about 95 species distributing worldwide from N Africa, N India, SE Asia to E Asia and the coast of the Mediterranean of Europe. In Korea, five species of this genus have been described. In this study, we included four species (D. genkwa, D. pseudomezereum, D. kiusiana, D. jejudoensis) from Korea, excluding cultivated D. odora. The morphological characters through local surveys and the re-classification of the specimens collected in the Korea National Herbarium (KH) were carried out and distribution maps for each taxon were also prepared. The major characters include habit, trichomes in winter bud, leaf, and twig, phyllotaxis, inflorescence, size of calyx lobe and trichomes in the calyx tube, etc. The distribution map showed that D. genkwa is mainly distributed in the coastal area of Hwanghaenam-do, Pyeongannam-do, Jeollabuk-do and Jeollanam-do, whereas D. pseudomezereum is distributed in the limestone zone of Gangwon-do, Jeollabuk-do, and Gyeongsangbuk-do. Similarly, D. kiusiana is mostly found in Jeollanam-do, Gyeongsangnam-do, and Jeju-do. In addition, D. jejudoensis is known to be distributed in forests of Murueng, Andeok, and Seonheul-ri in Jeju-do, but recently, new habitat is discovered in the island forest areas of Jeollanam-do. However, some of these individuals showed the characteristics of D. kiusiana, thus before come to any conclusion detailed taxonomic review of D. jejudoensis and D. kiusiana is required.

• Korean journal of applied entomology
• /
• v.62 no.4
• /
• pp.307-314
• /
• 2023

The genus Helina Robineau-Desvoidy, 1830 is one of the largest groups belonging to the subfamily Phaoniinae in the family Muscidae, comprising more than 540 species worldwide. In this taxonomic study, the genus Helina was recorded first time from the Korea with following three unrecorded species: H. deleta (Stein, 1914), H. evecta (Harris, 1780), and H. subpubiseta Xue, 1986. Taxonomic information, morphological photographs, and an identification key to the Korean species were provided.

• Korean Journal of Ichthyology
• /
• v.36 no.1
• /
• pp.84-93
• /
• 2024

The sharks identified in the coastal waters of Korea are known to date to 9 Orders, 21 Families, 32 Genera and 47 Species. Therefore, recent studies and records of shark appearance in Korean waters were reviewed and organized. As a result, Halaelurus buergeri was separated from the Family Scyliorhinidae into the Family Pentanchidae based on the supraorbital crest absent on cranium above eyes. Accordingly, compared to the previous study, Family Pentanchidae, Genus Hexanchus, and 2 Species Hexanchus griseus and the Alopias superciliosus were added, resulting in a total of 49 species of sharks in 9 Orders, 22 Families, and 33 Genera in coastal waters of Korea. A list of these species, a search table, and the history of scientific name changes are provided, and proposed a new Korean name of 'Bul-beom-sang-eo-gwa' of the Family Pentanchidae.

• Journal of Ecology and Environment
• /
• v.37 no.4
• /
• pp.299-313
• /
• 2014

The present study summarizes the taxonomic notes and korean distribution of 29 taxa of the desmids (Chlorophyta) collected from several swamps, reservoirs, rivers, and high land wetlands in South Korea from 2009 to 2013. All of these consisting of 9 genera (Tetmemorus 1 taxon, Pleurotaenium 5 taxa, Triploceras 1 taxon, Euastrum 7 taxa, Cosmarium 6 taxa, Staurastrum 5 taxa, Xanthidium 1 taxon, Hyalotheca 2 taxa, and Desmidium 1 taxon) are newly described in Korean freshwater algal flora. In this study, light microscopy of all of these are presented and briefly discussed with regard to their taxonomy, distribution and ecology within South Korea.

• Journal of Ecology and Environment
• /
• v.36 no.4
• /
• pp.421-437
• /
• 2013

A study on Chlorococcal algae was carried out at 33 stations (ponds, swamps, reservoirs, lakes and rivers) from May 2009 to January 2013. The families Hydrodictyaceae and Coelastraceae of order Chlorococcales were investigated, including 5 genera, 29 species, and 17 varieties. Among them, 8 taxa were newly recorded for Korea; 1) Family Hydrodictyaceae: Pediastrum asymmetricum, P. boryanum var. campanulatum, 2) Family Coelastraceae : Actinastrum aciculare, A. hantzschii var. subtile, Coelastrum indicum, C. microporum var. octaedricum, C. morus, C. pulchrum.

• Journal of Ecology and Environment
• /
• v.36 no.4
• /
• pp.327-338
• /
• 2013

A study on Chlorococcal algae was carried out at 21 stations (ponds, swamps, reservoirs, lakes and rivers) from May 2011 to January 2012. The families of Botryococcaceae and Characiaceae of Chlorococcales were investigated to the extent of 8 genera, 20 species. Among them, 10 taxa are newly recorded in algal flora of Korea by Kim and Kim (2012) and this study reviewed about ; 1) Family Botryococcaceae: Dictyosphaerium elegans, D. reniforme, D. simplex, D. elongatum, 2) Family Characiaceae: Characium conicum, Ankyra ancora, A. judayi, A. calcarifera, Schroederia spiralis, S. indica.

• Korean journal of applied entomology
• /
• v.21 no.1 s.50
• /
• pp.1-7
• /
• 1982

This study was conducted to describe unrecorded five species of thrips from leaf litter and dead wood in Korea. Described three species of Elaphrothrips 1,2,3, Podothrips sasacola and Pentagonothrips antennalis are for the first time in Korea. Specimens of thrips were collected in the area of Suweon, Jeju-Do., Mt. Seolag and Mt. Jiri in Korea, during the period from 1980 to 1981.

• Mycobiology
• /
• v.28 no.3
• /
• pp.149-152
• /
• 2000

Dried specimens of the genus Inocybe collected from mountain areas throughout the Korean country from 1982 to 1998 and preserved in NIAST were investigated. Out of them, Inocybe hystrix were confirmed as an unrecorded species in Korea. In 1991 Lee et al., previously recorded Inocybe kasukayamensis only with its scientific name and korean common name. In this study we report it with full descriptions of morphological characteristics and diagnosis of micro-structures of this species.

• Journal of Plant Biology
• /
• v.17 no.2
• /
• pp.99-105
• /
• 1974

Author has studied and reported on taxonomy of Korean sedges, using gross morphology, anatomy and epidermal patterns of the leaf blades(1969, 1971, 1973, 1974). This paper is the 6th report of epidermal patterns of leaf blade on sedges and includes 5 genera, Eriophorum, Fuirena, Kobresia, Rhynchospora and Scirpus. The author proposed to find epidermal patterns of leaf blades as an important taxonomic characteristic of sedges classification. The result of this study, the elements of leaf epidermis, subsidal cells, silica body, cell wall of long cell, prickles, and arrangement of the elements are considered to be significant characteristics for the identification and classification of sedge.