• Tuberculosis and Respiratory Diseases
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• 제45권6호
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• pp.1199-1213
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• 1998

연구배경 : 최근 면역기능저하 환자들이 급증하고 있으며 이들에 있어서 새로 발생된 설명이 불가능한 폐침윤은 매우 흔하면서도 환자의 생명을 위협할 수 있는 상황으로 발전할 수 있다. 폐진균증은 이런 임상상에서 폐침윤의 중요한 원인으로 대두되고 있으나 이에 대한 연구가 많지 않아 본 연구를 시행하였다. 방 법 : 1996년 10월부터 1998년 4월까지 삼성서울병원에서 면역기능저하 환자 중 새로운 폐침윤이 있었던 환자로 조직학적으로 폐에서 진균이 증명되었거나 정상적으로 균이 자리지 않는 부위(sterile)에서 시행한 배양검사장 진균이 배양된 환자들을 대상으로 임상적 특정, 방사선학적 소견, 진단적 검사, 치료 및 그 결과에 대해 후향적인 조사를 시행하였다. 결 과 : 총 13명의 환자 (M : F=8 : 5, 연령 중앙값 47세)에서 14예의 폐진균증이 진단되었다. 진단은 asperogillosis가 12예였고 mucormycosis가 2예였다. 혈액암 환자 9명에서 10예, 장기이식 환자에서 4예의 폐진균증이 진단되었다. 3예에서는 진단당시 경험적 amphotericin B를 중앙값 9일(8-21일)간 투여받고 있었다. 혈액암군 10예 중 9예에서 폐침윤 발견당시 백혈구 감소증이 중앙값 16일동안 지속되었으며 발열(9/10), 기침(6/10), 가래(5/10), 호흡곤란(4/10), 흉통 (5/10), 악설음(4/10) 등의 증상과 징후가 흔하게 관찰되었다. 반면에 장기이식환자군에서는 증상 및 징후가 뚜렸하지 않은 경우가 많았다(p<0.05). 단순 흉부촬영상으로 새로운 폐침윤은 단일 혹은 다발성의 결절(6/14)이나 경결(consolidation)(8/14)의 형태로 나타났으며 흉부 단층촬영상에서는 간유리음영(14/14), 흉수(5/14), 동공형성(7/14) 등의 소견이 관찰되었다. 확진한 방법으로는 개흉술이 10예, 비디오 흉강경술이 2예, 경피적침흡인술이 1예, 농양의 농 배양검사가 1예였다. 모든 환자는 amphotericin B(591-2806mg) 투여를 받았으며 1예에서 liposomal amphotericin B, 1예에서 경구 itraconazole로 치료를 부분적으로 시행하였다. Amphotericin B 투여 후 12/14예에서 폐병변의 호전이 관찰되었으며 14예중 4예에서 사망하거나 회복이 불가능한 상태로 퇴원하였다. 결 론 : 혈액암의 치료로 과립구감소증이 있는 환자나 장기이식 환자에서 새로운 폐침윤이 결절이나 경결의 형태로 발현하면, 증상이 미미하거나 경험적 amphotericin B를 투여하고 있더라도 폐진균증을 의심을 해야하며 적극적인 진단과 치료로써 예후를 호전시킬 수 있을 것으로 기대된다.

• Molecules and Cells
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• 제26권5호
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• pp.514-516
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• 2008

The cancer stem cell hypothesis posits that tumor growth is driven by a rare subpopulation of cells, designated cancer stem cells (CSC). Studies supporting this theory are based in large part on xenotransplantation experiments wherein human cancer cells are grown in immunocompromised mice and only CSC, often constituting less than 1% of the malignancy, generate tumors. Herein, we show that all colonies derived from randomly chosen single cells in mouse lung and breast cancer cell lines form tumors following allografting histocompatible mice. Our study suggests that the majority of malignant cells rather than CSC can sustain tumors and that the cancer stem cell theory must be reevaluated.

• Journal of Microbiology and Biotechnology
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• 제27권10호
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• pp.1727-1735
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• 2017

Hepatitis E virus (HEV) infections cause epidemic or sporadic acute hepatitis, which are mostly self-limiting. However, viral infection in immunocompromised patients and pregnant women may result in serious consequences, such as chronic hepatitis and liver damage, mortality of the latter of which reaches up to 20-30%. Type I interferon (IFN)-induced antiviral immunity is known to be the first-line defense against virus infection. Upon HEV infection in the cell, the virus genome is recognized by pathogen recognition receptors, leading to rapid activation of intracellular signaling cascades. Expression of type I IFN triggers induction of a barrage of IFN-stimulated genes, helping the cells cope with viral infection. Interestingly, some of the HEV-encoded genes seem to be involved in disrupting signaling cascades for antiviral immune responses, and thus crippling cytokine/chemokine production. Antagonistic mechanisms of type I IFN responses by HEV have only recently begun to emerge, and in this review, we summarize known HEV evasion strategies and compare them with those of other hepatitis viruses.

• Tuberculosis and Respiratory Diseases
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• 제79권4호
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• pp.307-311
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• 2016

Pulmonary strongyloidiasis is an uncommon presentation of Strongyloides infection, usually seen in immunocompromised hosts. The manifestations are similar to that of acute exacerbation of chronic obstructive pulmonary disease (COPD). Therefore, the diagnosis of pulmonary strongyloidiasis could be challenging in a COPD patient, unless a high index of suspicion is maintained. Here, we present a case of Strongyloides hyperinfection in a COPD patient mimicking acute exacerbation, who was on chronic steroid therapy.

• 대한후두음성언어의학회지
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• 제30권2호
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• pp.128-131
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• 2019

Acute supraglottitis is characterized by an inflammation and edema of the supraglottic region and a potential life-threatening condition because of its risk for sudden upper airway compromise. Prompt diagnosis, administration of broad spectrum antibiotics, and airway management is pivotal for reducing serious complications. In the immunocompromised host, microorganisms are more likely to elicit mucosal inflammations, thus clinicians should pay attention to those patients for prompt removal of the causes of immune disruption. Here we report a case of acute adult supraglottitis with neutropenia caused by anti-thyroid drug with a review of the related literatures.

• 한국축산식품학회지
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• 제38권2호
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• pp.376-390
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• 2018

Cronobacter species have been associated with disease outbreaks and sporadic infections, particularly in premature and immunocompromised infants. Cronobacter species can cause foodborne infections such as neonatal meningitis, septicaemia and necrotising enterocolitis. Accordingly, there is an urgent need to control and monitor the Cronobacter species in food, especially in powdered infant formula (PIF) and other baby foods. Therefore, in this review, the isolation and prevalence of Cronobacter species in infant food including PIF and the recent advance of detection methods are discussed for the better understanding on the current research status of Cronobacter species.

• 대한후두음성언어의학회지
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• 제15권2호
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• pp.153-155
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• 2004

Primary infection of the larynx with aspergillus spp. with immunocompetent patient is extremely rare, few cases have been reported in the literature. It is more commonly seen as a part of a wider infection involving the respiratory system in immunocompromised patients. We present one case of primary laryngeal aspergillosis without any other airway tract extension and without any generalized immune deficit in a 69 year-old woman with history of hoarseness. Direct laryngoscopy and biopsy confirmed the diagnosis of aspergillosis.

• Pediatric Infection and Vaccine
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• 제4권1호
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• pp.174-182
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• 1997

Pneumocystis carinii pneumonia mainly occurs in immunocompromised patients and it is also known of major cause of death in children with acute lymphoblastic leukemia. After consolidation chemotherapy, acute lymphoblastic leukemia children is developed Pneumocystis carinii pneumonia frequently no an opportunistic infection but there were no controlled studies which have been performed to evaluate the usefulness of corticosteroid in Pneumocystis carinii pneumonia with acute lymphoblastic leukemia. We experienced a case of Pneumocystis carinii pneumonia in acute lymphoblastic leukemia with febrile neutropenic 6 years old girl. She was treated with trimethoprim-sulfamethoxazole and prednisone. We report this case with brief review of related literature.

• Pediatric Infection and Vaccine
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• 제23권2호
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• pp.137-142
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• 2016

여러 기관을 침범하는 중증 주산기 거대세포바이러스 감염은 극저출생체중아 또는 면역저하 환자 이외의 경우에는 매우 드물다. 저자들은 재태연령 34주 6일, 2,460 g으로 출생한 후기 미숙아에서 다기관(중추신경계, 간, 폐, 위장관)을 침범한 거대세포바이러스에 의한 주산기 감염을 의심하고 ganciclovir 투약 후 회복된 증례를 경험하여 문헌 보고하는 바이다.

• 대한수의학회지
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• 제47권3호
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• pp.321-324
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• 2007

Pneumocystis (P.) carinii is an opportunistic fungal pathogen of many animal species and human, which can cause fatal pneumonia in immunocompromised individuals. Three 100-day-old pigs with progressive atrophy, anorexia and respiratory distress were submitted to the Cheju National University for diagnosis. Grossly, the lungs were enlarged with rubbery consistency. Histopathologically, the lungs were characterized by diffuse interstitial pneumonia with thickening of alveolar septa due to infiltration of macrophages and lymphocytes. Alveolar lumens were filled with a foamy eosinophilic proteinaceous material in which numerous punctiform organisms. The organisms were demonstrated as P. carinii by Grocott-methenamine-silver staining and immunohistochemistry in lungs of two pigs. In our best knowledge, this is believed to be the first report of P. carinii pneumonia in pigs in Korea.