• 대한수학회지
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• 제54권3호
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• pp.987-997
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• 2017

A deterministic model for the spread of pine wilt disease with asymptomatic carrier trees in the host pine population is designed and rigorously analyzed. We have taken four different classes for the trees, namely susceptible, exposed, asymptomatic carrier and infected, and two different classes for the vector population, namely susceptible and infected. A complete global analysis of the model is given, which reveals that the global dynamics of the disease is completely determined by the associated basic reproduction number, denoted by $\mathcal{R}_0$. If $\mathcal{R}_0$ is less than one, the disease-free equilibrium is globally asymptotically stable, and in such a case, the endemic equilibrium does not exist. If $\mathcal{R}_0$ is greater than one, the disease persists and the unique endemic equilibrium is globally asymptotically stable.

• 대한영상의학회지
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• 제83권1호
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• pp.54-69
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• 2022

심장 돌연사 환자들은 종종 흉통 또는 운동성 호흡곤란 등의 전조증상이 나타나지 않기 때문에 잠재적인 무증상 관상동맥 질환을 조기에 발견하는 것이 매우 중요하다. 관상동맥 전산화단층촬영 혈관조영술은 방사선 노출로 인한 위험성 때문에 무증상 환자에서 스크리닝 검사로 정당화되지 못했었지만 최근에 전산화단층촬영 기술의 비약적인 발전으로 방사선량을 1 mSv 미만으로 최소화함으로써 무증상 환자의 관상동맥 질환 선별 검사의 유용성에 대한 많은 연구가 진행되어 왔다. 그러나, 여전히 무증상 정상인 또는 환자의 관상동맥 질환 선별 검사에 대한 관상동맥 전산화단층촬영 혈관조영술의 유용성에 대해서는 다양한 의견들이 있다. 이 종설에서는 무증상 정상인 또는 환자들에게 관상동맥 질환 선별 검사로 관상동맥 칼슘 점수와 관상동맥 전산화단층촬영 혈관조영술 유용성에 대해서 다양한 문헌고찰을 통해서 알아보았다. 관상동맥 전산화단층촬영 혈관조영술상 무증상 정상인의 2.6%에서 70% 이상의 유의한 관상동맥 협착이 발견되었고, 선별 목적의 관상동맥 전산화단층촬영 혈관조영술이 무증상 건강한 사람의 미래의 심혈관 질환 발생을 예측할 수 있다. 그러나 현재 미국국립보건원에서 진행하고 있는 SCOT-HEART 2 연구가 끝나면 관상동맥 전산화단층촬영 혈관조영술이 무증상 성인의 심혈관 예방에 선별 검사로 적절한지 결정을 내릴 수 있을 것으로 생각된다.

• Clinical and Experimental Pediatrics
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• 제57권7호
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• pp.329-332
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• 2014

3-methylcrotonyl-coenzyme A carboxylase (3MCC) deficiency is an autosomal recessive disorder in which leucine catabolism is hampered, leading to increased urinary excretion of 3-methylcrotonylglycine. In addition, 3-hydroxyisovalerylcarnitine levels increase in the blood, and the elevated levels form the basis of neonatal screening. 3MCC deficiency symptoms are variable, ranging from neonatal onset with severe neurological abnormality to a normal, asymptomatic phenotype. Although 3MCC deficiency was previously considered to be rare, it has been found to be one of the most common metabolic disorders in newborns after the neonatal screening test using tandem mass spectrometry was introduced. Additionally, asymptomatic 3MCC deficient mothers have been identified due to abnormal results of unaffected baby's neonatal screening test. Some of the 3MCC-deficient mothers show symptoms such as fatigue, myopathy, or metabolic crisis with febrile illnesses. In the current study, we identified an asymptomatic 3MCC deficient mother when she showed abnormal results during a neonatal screening test of a healthy infant.

• 대한수의학회지
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• 제61권4호
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• pp.33.1-33.5
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• 2021

This study reports the detection and genotyping of the first clinical case of bovine anemia due to Theileria orientalis group (BATOG) in non-grazed dairy cow in upper South Korea. Blood and serum tests revealed anemia and hyperbilirubinemia from animal showing clinical symptoms, and later confirmed as piroplasmosis-positive. Follow-up surveillance on the herd revealed 2 asymptomatic cows with anemia. The three animals were confirmed theileriosis-positive and genotyping revealed the clinical and one of the asymptomatic cases have Chitose, while the other has Ikeda genotype. Clinical BATOG cases were rarely reported worldwide, and asymptomatic animals left untreated could serve as parasite reservoir.

• Parasites, Hosts and Diseases
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• 제53권6호
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• pp.699-703
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• 2015

Cystic echinococcosis (CE) is one of the most widespread zoonotic helminthiases, which can last an asymptomatic infection for several years. The purpose of this study was to demonstrate serum antibody prevalence of CE among asymptomatic people in Uzbekistan using ELISA. A total of 2,547 serum samples were collected, 66 from confirmed CE patients and 2,481 of patients with other diseases than CE at a hospital in Tashkent, Uzbekistan. The serum samples were screened for CE specific IgG antibodies by ELISA using cystic fluid antigen obtained from sheep. The serum antibody positive rate was 89.4% (59/66) in CE and 3.6% (89/2,481) in other disease patients. The present ELISA recognized 89.4% sensitivity and 96.4% specificity. The ELISA absorbance of positive samples was distributed 0.271-0.971 for CE and 0.273-0.887 for other disease patients. The other disease patients with high absorbance over 0.3 were 50 (2.0%) who were presumed to be active CE patients. The patients in their 40s showed the highest positive rate of 5.2% (P=0.181), and women were 4.4% while men were 3.1% positive (P=0.136). The data confirmed that there are many asymptomatic patients of CE in Tashkent. It is indicated that CE is an endemic disease of public health importance in Uzbekistan.

• 한국임상수의학회지
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• 제35권2호
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• pp.35-38
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• 2018

Recently assessment of suppression of tumorigenicity 2 (ST2) level has become a useful cardiac biomarker in human medicine. This study compared serum ST2 levels and N-terminal pro-B-type natriuretic peptide (NT-proBNP) levels between healthy dogs and dogs with chronic mitral valve disease. Twenty client-owned dogs were investigated. Dogs were divided into normal, asymptomatic, and symptomatic groups. Serum samples were used to measure levels of NT-proBNP and ST2. Samples for NT-proBNP were sent to IDEXX laboratory for analysis while ST2 levels were measured by using a canine interleukin 33 receptor ELISA kit. There was a significant difference in NT-proBNP levels between asymptomatic and symptomatic groups (P < 0.01), and between normal and symptomatic groups (P < 0.01). In contrast, ST2 levels were not relatively different between asymptomatic and symptomatic groups (P > 0.05). There was no significant difference was observed among all groups in ST2 study. The usefulness of measuring NT-proBNP level as a cardiac biomarker in dogs with chronic mitral valve disease was confirmed, but usefulness of the ST2 level was not observed. Further investigations are needed to evaluate the potential usefulness of ST2 level as a cardiac biomarker in canines.

• Korean Journal of Radiology
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• 제21권7호
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• pp.919-924
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• 2020

Objective: The current study reported a case series to illustrate the early computed tomography (CT) findings of coronavirus disease 2019 (COVID-19) in pediatric patients. Materials and Methods: All pediatric patients who were diagnosed with COVID-19 and who underwent CT scan in Zhongnan Hospital of Wuhan University from January 20, 2020 to February 28, 2020 were included in the current study. Data on clinical and CT features were collected and analyzed. Results: Four children were included in the current study. All of them were asymptomatic throughout the disease course (ranging from 7 days to 15 days), and none of them showed abnormalities in blood cell counts. Familial cluster was the main transmission pattern. Thin-section CT revealed abnormalities in three patients, and one patient did not present with any abnormal CT findings. Unilateral lung involvement was observed in two patients, and one patient showed bilateral lung involvement. In total, five small lesions were identified, including ground-glass opacity (n = 4) and consolidation (n = 1). All lesions had ill-defined margins with peripheral distribution and predilection of lower lobe. Conclusion: Small patches of ground-glass opacity with subpleural distribution and unilateral lung involvement were common findings on CT scans of pediatric patients in the early stage of the disease.

• Childhood Kidney Diseases
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• 제1권2호
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• pp.136-143
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• 1997

목적 : 경피적 신생검에 의해 사구체신염으로 진단된 환아들 중 무증상성 요이상을 주소로 하였던 환아들을 대상으로 이들을 다시 단독 단백뇨군, 단독 혈뇨군, 혈뇨와 단백뇨를 동시 에 나타내는 군으로 세분한 후 이들 각각에서의 사구체신염의 종류와 발생빈도를 분석하였다. 방법 : 1986년 1월부터 1996년 12월 사이에 인제의대 부산백병원 소아과에 입원하여 신질환이 의심되어 초음파 유도하에 Tru-cut needle을 이용하여 경피적 신생검을 시행한 환아들 중에서 사구체신염으로 진단된 15세 이하의 환아 310례 중 무증상성 요이상을 동반하였던 134례를 대상으로 하였다. 환아들의 임상양상은 의무기록을 중심으로 후향적으로 분석하였다. 결과 : 1) 전체 환아 310명 중 무증상성 요이상을 동반하였던 환아는 134명으로 전체의 43.2%를 차지하였다. 2) 무증상성 사구체신염 환아 중 원발성 사구체신염은 95명, 속발성 사구체신염은 39명으로 원발성 사구체신염이 더 많았으며, 원발성과 속발성 사구체신염의 발생 비는 2.44:1이었다. 이를 빈도순으로 살펴보면 IgA 신증이 26.9%로 가장 많았고, 다음으로 알레르기 자반증성 신염이 17.9%, 미세병변을 보인 경우가 17.2%, thin GBM disease가 12.7%, B형 간염 바이러스와 연관된 사구체신염이 6.0%, 연쇄상구균 감염 후 사구체신염이 3.0%, 막증식성 사구체신염과 메산지움 증식성 사구체신염이 각각 2.2%, Alport 증후군이 1.5%, fibrillary 신염이 0.7%의 순이었고, 어느 곳에도 분류되지 못한 경우가 9.7%를 차지하였다. 3) 단백뇨와 혈뇨를 동시에 동반한 군에서의 사구체신염의 분포를 보면 IgA 신증이 34.6%, 알레르기 자반증성신염이 19%, 미세병변을 보인 경우가 17.7%, thin GBM disease가 8.9%, B형 간염 바이러스와 연관된 사구체신염이 6.3%, 연쇄상구균 감염후 사구체신염이 3.6%, 메산지움 증식성 사구체신염과 막증식성 사구체신염 그리고 Alport 증후군이 각각 1.2%를 차지하였다. 4) 단독 혈뇨군에서의 사구체신염의 분포를 보면 thin GBM disease가 19.6%. IgA 신증과 알레르기 자반증성 신염이 각각 17.6%, 미세병변을 보인 경우가 11.8%, B형 간염 바이러스와 연관된 사구체신염과 막증식성 사구체신염 그리고 메산지움 증식성 사구체신염이 각각 3.9%, 연쇄상구균 감염 후 사구체신염과 Alport 증후군 그리고 fibrillary 신염이 각각 2.0%를 차지하였다. 5) 단독 단백뇨군은 4례 였는데 미세병변을 보인 경우가 3례, B형 간염 바이러스와 연관된 사구체신염이 1례를 차지하였다. 결론 : 혈뇨와 단백뇨를 동시에 동반하였던 군이 79례로 58.9%, 단독 혈뇨군이 51례로 38.1%, 단독 단백뇨군이 4례로 3%를 차지하여 혈뇨와 단백뇨를 동시에 동반한 군이 가장 많았다. 전체적인 사구체신염의 발생빈도를 살펴보면 IgA신증, 알레르기 자반증성 신증, 미세병변을 보인 경우, thin GBM disease순이었고, 혈뇨와 단백뇨를 동시에 동반한 군에서는 IgA 신증이, 단독 혈뇨군에서는 thin GBM disease가 가장 많았다.

• Childhood Kidney Diseases
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• 제24권1호
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• pp.14-18
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• 2020

Chronic kidney disease-mineral bone disorder (CKD-MBD) is a systemic disorder of mineral and bone metabolism caused by CKD. Patients with early-stage CKD who present with disordered regulation of bone and mineral metabolism may be asymptomatic. However, if untreated, the condition can be a significant barrier in achieving optimal bone strength, linear growth, and cardiovascular health in pediatric patients with CKD. Thus, the current study evaluated the definition, pathogenesis, diagnosis, and management of pediatric CKD-MBD.

• Clinical and Experimental Pediatrics
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• 제59권sup1호
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• pp.80-83
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• 2016

Isolated anomalous right coronary artery originating from the pulmonary artery (ARCAPA) is a rare congenital coronary anomaly that is asymptomatic and discovered incidentally in most cases. ARCAPA is generally not considered a fatal defect in infancy or childhood, although cases of sudden death have been reported. Here, we report a 2-month-old female infant who presented with a prolonged fever that was determined to be caused by rhinovirus infection. Myocardial ischemia of the left ventricular posterior wall was already seen on echocardiography, and ARCAPA was discovered incidentally. The patient underwent successful surgical reimplantation of the right coronary artery to the aortic root to re-establish dual ostial circulation.