• Tuberculosis and Respiratory Diseases
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• 제69권4호
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• pp.279-283
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• 2010

The global number of Mycobacterium avium complex (MAC) pulmonary infection is increasing. Patients with preexisting lung disease or who are immunodeficient are at the greatest risk for developing MAC infection. Endobronchial lesions with MAC infection are rare in the immunocompetent host. However, there have been an increasing number of reports of an immunocompetent host being afflicted with various manifestations of MAC infection. We report a case of pulmonary and endobronchial MAC infection presenting as an acute pneumonia in a 59-year-old female without preexisting lung disease or immunodeficiency.

• Archives of Plastic Surgery
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• 제32권3호
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• pp.393-396
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• 2005

The cutaneous aspergillosis is one of the most common dermatologic manifestations of disseminated infections associated with the Aspergillus organisms, but the isolated primary cutaneous disease itself can rarely occur in an immunocompetent host. We report a case of the primary cutaneous aspergillosis on the scalp and the neck in a 39-year-old immunocompetent male patient. There was a single purulent ulcer surrounded by the erythematous indurated plaque on the scalp with multiple satellite papules and a multi-lobulated granulomatous plaque with a crust on the neck. Skin biopsy demonstrated a fungus, the Aspergillus, in the deep dermis as the etiologic agent. No evidence of involvement in other organs was found. The patient exhibited no other apparent systemic diseases nor immunologic defects. An elliptical excision and a primary closure was performed, and the adjuvant antifungal treatment, oral itraconazole, was applied to prevent the recurrence by the satellite lesions.

• Journal of Chest Surgery
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• 제37권12호
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• pp.1022-1024
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• 2004

국균은 사람에서 발견되는 진균중 가장 흔한 것이기는 하나 낮은 병원성을 갖고 있다. 국균의 호흡기 감염은 국균종, 기관지폐 국균증,괴사성 및 침습형 폐 국균증의 유형으로 분류된다. 이중 괴사성 및 침습형 폐 국균증은 장기 이식 후 면역억제 치료를 받고 있거나, 항암요법을 받는 자, 혈액 이상자 또는 후천성 면역 결핍증 환자 같이 면역 저하자에서 주로 발생하며 정상적인 면역 능력이 있는 자에서는 발병률이 매우 낮다. 본원에서는 정상 면역 능력을 갖은 자에서 흉추에 침범한 침습형 페 국균증을 1예 치험하였기에 보고하는 바이다.

• Tuberculosis and Respiratory Diseases
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• 제60권5호
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• pp.571-575
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• 2006

최근 비결핵성 마이코박테리아 폐질환에 대한 관심이 증가되고 있으며 이에 대한 다양한 보고가 이뤄지고 있다. 외국 문헌에서는 M. avium 감염의 대표적인 임상상인 상엽 공동형과 결절성 기관지 확장증 형과는 다른 형태의 M. avium 기관지 질환이 후천성 면역 결핍증 환자뿐만 아니라 면역 적격자인 건강한 성인에서도 드물게 보고 되고 있으나, 국내에서는 지금까지 이에 대한 보고가 없었다. 본 저자들은 이전 폐질환이 없는 건강한 면역 적격자에서 M. avium 감염에 의한 기관지 질환을 경험하고 이 환자의 임상적인 소견과 경과를 문헌 고찰과 함께 보고하는 바이다.

• Journal of Korean Neurosurgical Society
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• 제57권1호
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• pp.50-53
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• 2015

Usually fungal infections caused by opportunistic and pathogenic fungi had been an important cause of morbidity and mortality among immunocompromised patients. However clinical data and investigations for immunocompetent pathogenic fungal infections had been rare and neglected into clinical studies. Especially Cryptococcal brainstem abscess cases mimicking brain tumors were also much more rare. So we report this unusual case. This 47-year-old man presented with a history of progressively worsening headache and nausea for 1 month and several days of vomituritions before admission. Neurological and laboratory examinations performed demonstrated no abnormal findings. Previously he was healthy and did not have any significant medical illnesses. A CT and MRI scan revealed enhancing $1.8{\times}1.7{\times}2.0$ cm mass lesion in the left pons having central necrosis and peripheral edema compressing the fourth ventricle. And also positron emission tomogram scan demonstrated a hot uptake of fluoro-deoxy-glucose on the brainstem lesion without any evidences of systemic metastasis. Gross total mass resection was achieved with lateral suboccipital approach with neuronavigation system. Postoperatively he recovered without any neurological deficits. Pathologic report confirmed Cryptococcus neoformans and he was successively treated with antifungal medications. This is a previously unreported rare case of brainstem Cryptococcal abscess mimicking brain tumors in immunocompetent host without having any apparent typical meningeal symptoms and signs with resultant good neurosurgical recovery.

• IMMUNE NETWORK
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• 제21권6호
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• pp.40.1-40.20
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• 2021

Mycobacteroides abscessus (previously Mycobacterium abscessus; Mabc), one of rapidly growing nontuberculous mycobacteria (NTM), is an important pathogen of NTM pulmonary diseases (NTM-PDs) in both immunocompetent and immunocompromised individuals. Mabc infection is chronic and often challenging to treat due to drug resistance, motivating the development of new therapeutics. Despite this, there is a lack of understanding of the relationship between Mabc and the immune system. This review highlights recent progress in the molecular architecture of Mabc and host interactions. We discuss several microbial components that take advantage of host immune defenses, host defense pathways that can overcome Mabc pathogenesis, and how host-pathogen interactions determine the outcomes of Mabc infection. Understanding the molecular mechanisms underlying host-pathogen interactions during Mabc infection will enable the identification of biomarkers and/or drugs to control immune pathogenesis and protect against NTM infection.

• Tuberculosis and Respiratory Diseases
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• 제45권1호
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• pp.197-203
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• 1998

Invasive pulmonary aspergillosis is a disease occuring predominantly in patients with defects in immunity such as neutropenia, hematologic malignancies or with defects in cell-mediated immunity. The isolation of Aspergillus from respiratory tract of normal host usually signifies tracheobronchial colonization, making this diagnosis difficult. There are isolated case reports occuring in normal hosts but most of them were diagnosed postmortem at autopsies indicating that early diagnosis of invasive aspergillosis in normal host is difficult. We describe here a case of invasive aspergillosis in a immunocompetent host diagnosed by lung biopsy which was successfully treated with Amphotericin-B. Invasive pulmonary aspergillosis should be included as one of the differential diagnosis if a patient with pneumonic consolidation does not respond to usual therapy, even if the patient does not have any defect in immunity.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제2권1호
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• pp.85-92
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• 1999

저자들은 15세 된 남아와 8세된 남아에서 C. parvum에 의한 위장관염 2례를 경험하였으며 전자 현미경상으로 확진하여 보고하는 바이다. 향후 국내에서도 소아의 설사질환의 원인으로서 cryptosporidiosis에 대한 임상의들의 많은 관심이 요구된다.

• Journal of Veterinary Science
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• 제23권3호
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• pp.41.1-41.15
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• 2022

Background: Proliferative enteritis caused by Lawsonia intracellularis undermines the economic stability of the swine industry worldwide. The development of cost-effective animal models to study the pathophysiology of the disease will help develop strategies to counter this bacterium. Objectives: This study focused on establishing a model of gastrointestinal (GI) infection of L. intracellularis in C57BL/6 mice to evaluate the disease progression and lesions of proliferative enteropathy (PE) in murine GI tissue. Methods: We assessed the murine mucosal and cell-mediated immune responses generated in response to inoculation with L. intracellularis. Results: The mice developed characteristic lesions of the disease and shed L. intracellularis in the feces following oral inoculation with 5 × 10⁷ bacteria. An increase in L. intracellularis 16s rRNA and groEL copies in the intestine of infected mice indicated intestinal dissemination of the bacteria. The C57BL/6 mice appeared capable of modulating humoral and cell-mediated immune responses to L. intracellularis infection. Notably, the expression of genes for the vitamin B12 receptor and for secreted and membrane-bound mucins were downregulated in L. intracellularis -infected mice. Furthermore, L. intracellularis colonization of the mouse intestine was confirmed by the immunohistochemistry and western blot analyses. Conclusions: This is the first study demonstrating the contributions of bacterial chaperonin and host nutrient genes to PE using an immunocompetent mouse model. This mouse infection model may serve as a platform from which to study L. intracellularis infection and develop potential vaccination and therapeutic strategies to treat PE.

• Tuberculosis and Respiratory Diseases
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• 제77권3호
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• pp.132-135
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• 2014

Rhinovirus infection is typically associated with the common cold and has rarely been reported as a cause of severe pneumonia in immunocompetent adults. A 55-year-old previous healthy woman, who consumed half a bottle of alcohol daily, presented with respiratory failure after one week of upper respiratory infection symptoms. Radiography revealed bilateral, diffuse ground glass opacity with patchy consolidation in the whole lung field; bronchoalveolar lavage fluid analysis indicated that rhinovirus was the causative organism. After five days of conservative support, the symptoms and radiographic findings began to improve. We report this rare case of rhinovirus pneumonia in an otherwise healthy host along with a review of references.