1.Risk Assessment Program of Highly Pathogenic Avian Influenza with Deep Learning Algorithm
Hachung YOON ; Ah-Reum JANG ; Chungsik JUNG ; Hunseok KO ; Kwang-Nyeong LEE ; Eunesub LEE
Osong Public Health and Research Perspectives 2020;11(4):239-244
This study presents the development and validation of a risk assessment program of highly pathogenic avian influenza (HPAI). This program was developed by the Korean government (Animal and Plant Quarantine Agency) and a private corporation (Korea Telecom, KT), using a national database (Korean animal health integrated system, KAHIS). Our risk assessment program was developed using the multilayer perceptron method using R Language. HPAI outbreaks on 544 poultry farms (307 with H5N6, and 237 with H5N8) that had available visit records of livestock-related vehicles amongst the 812 HPAI outbreaks that were confirmed between January 2014 and June 2017 were involved in this study. After 140,000 iterations without drop-out, a model with 3 hidden layers and 10 nodes per layer, were selected. The activation function of the model was hyperbolic tangent. Precision and recall of the test gave F1 measures of 0.41, 0.68 and 0.51, respectively, at validation. The predicted risk values were higher for the “outbreak” (average ± SD, 0.20 ± 0.31) than “non-outbreak” (0.18 ± 0.30) farms ( The risk assessment model developed was employed during the epidemics of 2016/2017 (pilot version) and 2017/2018 (complementary version). This risk assessment model enhanced risk management activities by enabling preemptive control measures to prevent the spread of diseases.
2.Delayed Vertebral Artery Dissection after Posterior Cervical Fusion with Traumatic Cervical Instability: A Case Report.
Chang Hyun OH ; Gyu Yeul JI ; Seung Hwan YOON ; Dongkeun HYUN ; Eun Young KIM ; Hyeonseon PARK ; A Reum JANG
Korean Journal of Spine 2015;12(2):79-83
Vascular injury presented immediately after the penetration, but delayed onset of vascular symptom caused by an embolism or vessel dissection after cervical fusion or traumatic event is extremely rare. We present a case of a 56-year-old woman who underwent an operation for cervical fusion for type II Odontoid process fracture. She presented symptoms of seizure with hemiparesis in 6 days after the operation. Multifocal acute infarction due to an embolism from the left VA (V3 segment) dissection was observed without a definite screw breach the transverse foramen. We hereby reported the instructive case report of delayed onset of vertebral artery dissection after posterior cervical fusion with type II odontoid process fracture patient. When a cervical operation performed in the cervical trauma patient, even if no apparent VA injury occurs before and during the operation, the surgeon must take caution not to risk cerebral infarction because of the delayed VA dissection.
Cerebral Infarction
;
Embolism
;
Female
;
Humans
;
Infarction
;
Middle Aged
;
Odontoid Process
;
Paresis
;
Seizures
;
Vascular System Injuries
;
Vertebral Artery Dissection*
3.Surface Landmarks do not Correspond to Exact Levels of the Cervical Spine: References According to the Sex, Age and Height.
Chang Hyun OH ; Gyu Yeul JI ; Seung Hwan YOON ; Dongkeun HYUN ; Chun Gil CHOI ; Hyun Kyoung LIM ; A Reum JANG
Korean Journal of Spine 2014;11(3):178-182
OBJECTIVE: A general orientation along the cervical spine could be estimated by external landmarks, and it was useful, quick and less exposable to radiation, but, sometimes it gave reference confusion of target cervical level. The authors reviewed the corresponding between the neck external landmarks and cervical levels. METHODS: Totally 1,031 cervical lateral radiographs of different patients were reviewed in single university hospital. Its compositions were 534 of males and 497 females; 86 of second decades (10-19 years-old), 169 of third decades, 159 of fourth decades, 209 of fifth decades, 275 of sixth decades, and 133 of more than seventh decades (>60 years-old). Reference external landmarks (mandible, hyoid bone, thyroid cartilage, and cricothyroid membrane) with compounding factors were reviewed. RESULTS: The reference levels of cervical landmarks were C2.13 with mandible angle, C3.54 with hyoid bone, C5.12 with thyroid cartilage, and C6.01 with cricothyroid membrane. The reference levels of cervical landmarks were differently observed by sex, age, and somatometric measurement (height) accordingly mandible angle from C1 to C3, hyoid bone from disc level of C2 and C3 to C5, thyroid cartilage from disc level of C3 and C4 to C7, and cricothyroid membrane from C4 to disc level of C7 and T1. CONCLUSION: Surface landmarks only provide general reference points, but not correspond to exact levels of the cervical spine. Intraoperative fluoroscopy ensures a more precise placement to the targeted cervical level.
Female
;
Fluoroscopy
;
Humans
;
Hyoid Bone
;
Male
;
Mandible
;
Membranes
;
Neck
;
Spine*
;
Thyroid Cartilage
5.Interleukin 13 on Microglia is Neurotoxic in Lipopolysaccharide-injected Striatum in vivo
Ah Reum HONG ; Jae Geun JANG ; Young Cheul CHUNG ; So-Yoon WON ; Byung Kwan JIN
Experimental Neurobiology 2022;31(1):42-53
To explore the potential function of interleukin-13 (IL-13), lipopolysaccharide (LPS) or PBS as a control was unilaterally microinjected into striatum of rat brain. Seven days after LPS injection, there was a significant loss of neurons and microglial activation in the striatum, visualized by immunohistochemical staining against neuronal nuclei (NeuN) and the OX-42 (complement receptor type 3, CR3), respectively. In parallel, IL-13 immunoreactivity was increased as early as 3 days and sustained up to 7 days post LPS injection, compared to PBS-injected control and detected exclusively within microglia. Moreover, GFAP immunostaining and blood brain barrier (BBB) permeability evaluation showed the loss of astrocytes and disruption of BBB, respectively. By contrast, treatment with IL-13 neutralizing antibody (IL-13NA) protects NeuN + neurons against LPSinduced neurotoxicity in vivo . Accompanying neuroprotection, IL-13NA reduced loss of GFAP + astrocytes and damage of BBB in LPS-injected striatum. Intriguingly, treatment with IL-13NA produced neurotrophic factors (NTFs) on survived astrocytes in LPS-injected rat striatum. Taken together, the present study suggests that LPS induces expression of IL-13 on microglia, which contributes to neurodegeneration via damage on astrocytes and BBB disruption in the striatum in vivo.
7.Colonic Intramucosal Cancer in the Interposed Colon Treated with Endoscopic Mucosal Resection: A Case Report and Review of Literature
Seung Ho BAEK ; Jang Ho LEE ; Dong Ryeol YOO ; Hye Yeong KIM ; Meihua JIN ; Ah Reum JANG ; Dong Hoon YANG ; Jeong Sik BYEON
Clinical Endoscopy 2019;52(4):377-381
Colon interposition is a surgical procedure used for maintenance of luminal conduit after esophagectomy. Although epithelial neoplasia, such as adenoma and adenocarcinoma, may develop in the interposed colon, there are only few case reports on the condition. Due to the rarity of this condition, there is no definite consensus on recommending screening endoscopy for the early detection of neoplasia in the interposed colons. Here, we report a case of intramucosal adenocarcinoma in an interposed colon. Initial endoscopic resection for this tumor failed to accomplish complete resection. A subsequent endoscopic resection was performed 1 month later and complete resection was achieved. Based on our experience and recommendation on screening endoscopy for gastric cancer in Korea, we suggest that regular screening esophagogastroduodenoscopies should be performed following esophagectomy to detect early neoplasia in the stomach and interposed colon and avoid adverse results induced by delayed detection.
Adenocarcinoma
;
Adenoma
;
Colon
;
Consensus
;
Endoscopy
;
Endoscopy, Digestive System
;
Esophagectomy
;
Korea
;
Mass Screening
;
Phenobarbital
;
Stomach
;
Stomach Neoplasms
8.Gut-residing Microbes Alter the Host Susceptibility to Autoantibody-mediated Arthritis.
Hyerim LEE ; Bo Eun JIN ; Eunkyeong JANG ; A Reum LEE ; Dong Soo HAN ; Ho Youn KIM ; Jeehee YOUN
Immune Network 2014;14(1):38-44
K/BxN serum can transfer arthritis to normal mice owing to the abundant autoantibodies it contains, which trigger innate inflammatory cascades in joints. Little is known about whether gut-residing microbes affect host susceptibility to autoantibody-mediated arthritis. To address this, we fed C57BL/6 mice with water containing a mixture of antibiotics (ampicillin, vancomycin, neomycin, and metronidazol) for 2 weeks and then injected them with K/BxN serum. Antibiotic treatment significantly reduced the amount of bacterial genomic DNA isolated from fecal samples, in particular a gene encoding 16S ribosomal RNA derived from segmented filamentous bacteria. Arthritic signs, as indicated by the arthritic index and ankle thickness, were significantly attenuated in antibiotic-treated mice compared with untreated controls. Peyer's patches and mesenteric lymph nodes from antibiotic-treated mice contained fewer IL-17-expressing cells than those from untreated mice. Antibiotic treatment reduced serum C3 deposition in vitro via the alternative complement pathway. IL-17-/- congenic C57BL/6 mice were less susceptible to K/BxN serum-transferred arthritis than their wild-type littermates, but were still responsive to treatment with antibiotics. These results suggest that gut-residing microbes, including segmented filamentous bacteria, induce IL-17 production in GALT and complement activation via the alternative complement pathway, which cause the host to be more susceptible to autoantibody-mediated arthritis.
Animals
;
Ankle
;
Anti-Bacterial Agents
;
Arthritis*
;
Autoantibodies
;
Bacteria
;
Complement Activation
;
Complement Pathway, Alternative
;
DNA
;
Genes, vif
;
Interleukin-17
;
Joints
;
Lymph Nodes
;
Mice
;
Neomycin
;
Peyer's Patches
;
RNA, Ribosomal, 16S
;
Vancomycin
;
Water
9.An insulinoma with an aberrant feeder from the splenic artery detected by super-selective arterial calcium stimulation with venous sampling.
Joon Ho MOON ; Eun Ky KIM ; Ah Reum KHANG ; Hyo Cheol KIM ; Jin Young JANG ; Young Min CHO
The Korean Journal of Internal Medicine 2015;30(1):118-121
No abstract available.
Biopsy
;
Blood Glucose/metabolism
;
C-Peptide/blood
;
Calcium Gluconate/administration & dosage/*diagnostic use
;
Female
;
Humans
;
Immunohistochemistry
;
Injections, Intra-Arterial
;
Insulin/blood
;
Insulinoma/blood/*blood supply/pathology/surgery
;
Middle Aged
;
Pancreatic Neoplasms/blood/*blood supply/pathology/surgery
;
Pancreaticoduodenectomy
;
Splenic Artery/*radiography
;
*Tomography, X-Ray Computed
;
Treatment Outcome
;
Tumor Markers, Biological/blood
10.Fulminant and Fatal Multiple Organ Failure in a 12-Year-Old Boy With Mycoplasma pneumoniae Infection.
Se Jin PARK ; Ki Soo PAI ; Ah Reum KIM ; Jang Hoon LEE ; Jae Il SHIN ; Soo Young LEE
Allergy, Asthma & Immunology Research 2012;4(1):55-57
Mycoplasma pneumoniae (Mp) is a unique pathogen that causes not only pulmonary but also extrapulmonary manifestations that must be rapidly diagnosed. A 12-year-old boy, with no relevant medical history, presented with fever, severe epigastric pain, and vomiting. Laboratory findings showed fulminant and cholestatic hepatitis, hemolytic anemia, thrombocytopenia, acute kidney injury, disseminated intravascular coagulopathy, acute myocardial infarction, and rhabdomyolysis. His clinical condition rapidly deteriorated during intubation and continuous renal replacement therapy. Despite intensive treatment, he did not recover. We report a case of fulminant and fatal multiple organ failure in a previously healthy boy with Mp infection, describing the possible pathomechanisms of multiple organ failure involved in the disease.
Acute Kidney Injury
;
Anemia, Hemolytic
;
Child
;
Fever
;
Hepatitis
;
Humans
;
Intubation
;
Multiple Organ Failure
;
Mycoplasma
;
Mycoplasma pneumoniae
;
Myocardial Infarction
;
Pneumonia, Mycoplasma
;
Renal Replacement Therapy
;
Rhabdomyolysis
;
Thrombocytopenia
;
Vomiting