Publications by authors named "Chi Sun Yun"

Article Synopsis
  • Staphylococcus hyicus is a bacterium that leads to skin disease in piglets, producing harmful toxins responsible for symptoms of exudative epidermitis, and antimicrobial treatment often fails due to resistance issues.
  • A study examined 17 isolates of S. hyicus from piglets, confirming their identity and analyzing the presence of specific exfoliative toxin genes, with 52.9% of isolates showing these genes, primarily exhB, exhC, and exhD.
  • Results indicated that while all isolates were highly susceptible to certain antibiotics, 82.4% displayed multidrug resistance, highlighting the need for better management and treatment approaches for the skin disease in pigs.
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  • Cryptosporidium and Giardia duodenalis are common parasites that cause diarrhea in dogs and humans, and a study was conducted to examine their prevalence in shelter dogs in South Korea.
  • Researchers analyzed 345 dog fecal samples and found a prevalence of 6.67% for Cryptosporidium spp., with C. canis being the most common, and 17.68% for G. duodenalis, which was more frequent in dogs with diarrhea.
  • The study discovered regional differences in parasite prevalence and identified specific genetic characteristics of the parasites, offering valuable insights into their distribution and types in shelter dogs.
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  • The study examines cases of bovine abortions in South Korea caused by an opportunistic bacterium, focusing on its pathological findings, antimicrobial resistance, and genetic traits.
  • Three bovine abortion cases revealed severe lung issues and other infections, with bacterium detected in all affected fetuses; two were attributed solely to the bacterium, while one was associated with a viral coinfection.
  • This marks the first report of such abortions linked to this bacterium in South Korea, highlighting the need for ongoing research to understand its characteristics and resistance patterns.
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C-C motif chemokine ligand 2 (CCL2) has been reported to be expressed in the bovine endometrium during pregnancy. However, the details of its functions involved in the implantation mechanism are still not clear. The purpose of this study is to analyze the functional properties of CCL2 in the bovine endometrium and embryos.

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Introduction: , , and are gastrointestinal protozoa parasites that cause diarrhea in various animals. However, information regarding the detection and phylogenetic characterization of gastrointestinal protozoa parasites in cats is limited throughout South Korea. Therefore, this study aimed to determine the detection and identify subspecies of gastrointestinal protozoa parasites in cats from South Korea.

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This study aimed to investigate the pathogenicity of extraintestinal pathogenic Escherichia coli (ExPEC) isolated from dog and cat lung samples in South Korea. A total of 101 E. coli isolates were analyzed for virulence factors, phylogroups, and O-serogroups, and their correlation with bacterial pneumonia-induced mortality was elucidated.

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Glandular epithelial cells (GE) in the endometrium are thought to support the elongation and survival of ruminant embryos by secreting histotrophs. In the present study, the gene expression of bovine endometrial epithelial cells cultured in matrigel was analyzed and examined whether it could be an in vitro model of GE. Bovine endometrial epithelial cells (BEE) and stromal cells (BES) were isolated from the slaughterhouse uteri and cultured in DMEM/F12 + 10% FBS.

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Interferon tau (IFNT) is thought to have essential functions in maternal recognition and establishment of pregnancy in ruminants. There, however, is a lack of research on embryonic factors that affect pregnancy other than IFNT. The present study was conducted to determine what are other embryo-derived factors involved in pregnancy recognition and to identify effects on endometrial cells using an in vitro culture system.

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Background: Epidermoid cysts are benign tumors derived from the infundibular portion of hair follicles and thus have a flattened surface epithelium and keratohyaline granules. They can occur at any age but are most frequently reported in adults, and more often occur in men than women. Most epidermoid cyst operations are performed for cosmetic purposes, or to relieve inflammation.

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Bilateral coronary artery to pulmonary artery fistula is very rare. We describe a 70-year-old female patient with communicating bilateral coronary artery to pulmonary artery fistula identified on coronary angiography and coronary computed tomography angiography.

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