• 한국미생물·생명공학회지
• /
• 제45권2호
• /
• pp.93-100
• /
• 2017

인간노로바이러스는 바이러스성 식중독 원인의 대부분을 차지한다. 노로바이러스가 건강한 성인에 감염하면 설사 등의 병변을 몇 일간 일으키다 대부분 별다른 처치 없이도 치유되는 경우가 대부분이다. 그러나 면역기능이 약화된 환자에게 감염한 경우, 만성감염 내지 치명적 감염도 가능한 것으로 보고 되고 있다. 1968년에 처음 노로바이러스가 보고된 이후 세포 감염모델과 소동물감염 모델을 만들고자 하는 시도가 이어져 왔으나 대부분 실패하였다. 그러나 최근들어 세포감염 모델 개발에 있어 주목할 만한 기념비적인 연구들이 이루어졌다 것이 고무적이다 할 수 있다. 이번 총설에서는 새로 개발된 감염 모델들의 특징과 장단점을 살펴보고, 이를 더욱 개선할 수 있는 방향에 대하여 살펴보고자 한다.

• 농촌의학ㆍ지역보건
• /
• 제15권1호
• /
• pp.49-55
• /
• 1990

Zoonoses are those diseases and infections that are naturally transmitted between vertebrate animals and man. At present, approximately 175 diseases caused by virus, rickettsia, bacteria, protozoa and helminthes as well as some of arthropods and the number is continually increasing. Although zoonoses are generally recognized as significant health problems, the actual prevalence and incidence of zoonotic infections is difficult to determine. Medical services in a rural area are scarce and ill persons may have little chance to see a physician. Furthermore, a lack of physician awareness and of appropriate diagnostic support is made often misdiagnosis. In rural Korea, parasitic disease is still important subject in the field of zoonotic infections considering its number and morbidity. Recently there was conspicuous reduction of soil-transmitted parasitic diseases (i.e. ascariasis. hookworms, trichuriasis), but clonorchiasis. intestinal trematodiases and taeniasis are a considerable problem. This is often significantly related to human behavioral patterns based on socio-economic and cultural conditions and linked with the local biologic and physical environment. The most of all parasitic zoonoses to man and animals are the food-transmitted parasitic diseases, and domestic animals such as dog, cat, pig, as well as fat and some mammals, ruminants and birds are act as reservoir hosts. In the present topics, current problems of parasitic zoonoses caused by protozoan infections (i. e. toxoplasmosis, pneumocystosis and cryptosporidiosis) which are the most common opportunistic in AIDS or immunocompromised persons, trematode infections (i.e. clonorchiasis, paragonimiasis and some intestinal tremadodiases). cestode infections such as cysticercosis and sparganosis, and some nematode infections of anisakiasis, thelaziasis and strongyloidiasis, are discussed here those on the occurrence in man and animals and the source of transmission as well as prevention and control measures in Korea.

• Tuberculosis and Respiratory Diseases
• /
• 제42권1호
• /
• pp.93-98
• /
• 1995

저자들은 양측성 결절성 부신피질 증식증으로 양측 부신절제술을 받은환자에서 스테로이드 유지요법중 폐효모균증이 발견되어 약물치료후 호전된뒤 수개월내에 다시 폐결핵이 병발된 1예를 문헌고찰과 함께 보고하는 바이다.

• Tuberculosis and Respiratory Diseases
• /
• 제71권4호
• /
• pp.249-253
• /
• 2011

Background: Mycobacterial infection is a problem throughout the world along with the increase of immunocompromised patients. For this reason, there have been many methods for faster and more accurate diagnosis. In this study, we evaluated several laboratory methods for mycobacterial infection. Methods: From January to December 2009, 635 specimens were cultured with mycobacteria growth indicator tube (MGIT) and Ogawa media. Polymerase chain reaction (PCR) was performed with the AdvanSure tuberculosis (TB)/non-tuberculosis mycobacterium (NTM) real-time PCR Kit (LG Life Sciences, Seoul, Korea). The 69 samples showing positive culture results were identified with the AdvanSure Mycobacteria Genotyping Chip Kit (LG Life Science, Seoul, Korea). Results: Sixty-nine (10.9%) out of 635 samples showed positive results for mycobacterial culture. Among the 635 samples, 64 were positive in MGIT, but only 42 were positive in Ogawa media. Of the 635 samples, 607 (95.6%) showed the same results between MGIT and Ogawa and the results of 579 (95.4%) were also consistent with the TB/NTM real-time PCR results. However, in the case of NTM, only one (1/24, 4.2%) was positive in PCR. In the Mycobacteria genotyping chip analysis, the most frequently identified NTM species in descending order were M. avium, M. intracellulare, M. chelonae and M. abscessus. Conclusion: Culturing with a combination of MGIT and Ogawa is recommended to increase the recovery rate of mycobacteria. Although PCR missed a reasonable number of NTM, it is faster and usually gives results that concur with those from the culture. The appropriate combination of diagnostic methods with clinical correlation are necessary.

• Tuberculosis and Respiratory Diseases
• /
• 제75권6호
• /
• pp.260-263
• /
• 2013

Invasive aspergillosis has emerged as a major cause of life-threatening infections in immunocompromised patients. Recently, patients with chronic obstructive pulmonary disease, who have been receiving corticosteroids for a long period, and immunocompetent patients in the intensive care unit have been identified as nontraditional hosts at risk for invasive aspergillosis. Here, we report a case of invasive pulmonary aspergillosis after influenza in an immunocompetent patient. The patient's symptoms were nonspecific, and the patient was unresponsive to treatments for pulmonary bacterial infection. Bronchoscopy revealed mucosa hyperemia, and wide, raised and cream-colored plaques throughout the trachea and both the main bronchi. Histologic examination revealed aspergillosis. The patient recovered quickly when treated systemically with voriconazole, although the reported mortality rates for aspergillosis are extremely high. This study showed that invasive aspergillosis should be considered in immunocompetent patients who are unresponsive to antibiotic treatments; further, early extensive use of all available diagnostic tools, especially bronchoscopy, is mandatory.

• Tuberculosis and Respiratory Diseases
• /
• 제49권1호
• /
• pp.105-110
• /
• 2000

저자들은 객담, 기침, 발열과 호흡곤란을 보이고 단순 흉부촬영상 다발성 공동과 경변을 보이며 흉부 전산화 촬영과 폐동맥 혈관조영술상 폐 동맥류가 확인된 환자에서 폐 절제술후 만성 괴사성 침입성 폐 국균증으로 진단된 1예를 경험하였기에 이에 보고하는 바이다.

• Tuberculosis and Respiratory Diseases
• /
• 제73권3호
• /
• pp.182-186
• /
• 2012

Cryptococcosis is an invasive fungal infection, which is more common in immunocompromised patients. However, pulmonary cryptococcosis can occur in immunocompetent patients and should be considered on a differential diagnosis for nodular or mass-like lesions in chest radiograph. Recently, we experienced a patient with pulmonary cryptococcosis, successfully treated with oral fluconazole therapy. A 74-year-old female patient was referred for an evaluation of abnormal images, a large consolidative mass with multiple nodular consolidations and small nodules that mimics primary lung cancer with multiple lung to lung metastases. Computed tomography-guided lung biopsy confirmed the diagnosis of pulmonary cryptococcosis. The follow-up image taken after 4 months with oral fluconazole treatment showed marked improvement.

• Tuberculosis and Respiratory Diseases
• /
• 제66권6호
• /
• pp.463-466
• /
• 2009

S. constellatus는 Streptococcus milleri group을 이루는 균이며 상부호흡기계, 비뇨기계 등에 정상 상재균으로 존재하다 면역저하 상태에서 기회감염을 일으키며 주로 농을 형성하는 것으로 알려져 있다. 저자들은 혈액투석을 받는 환자에게 발생한 S. constellatus에 의한 농흉 1예를 경험하였기에 문헌고찰과 함께 보고한다. 본 증례를 통해 면역이 저하된 환자에게 농흉이 형성된 경우 S. constellatus에 의한 감염을 생각해볼 수 있으며 이와 같은 경우 세균학적 검사 결과에 따른 항생제 치료와 함께 수술적 배농을 고려해야 한다는 것을 경험하였다.

• Parasites, Hosts and Diseases
• /
• 제44권3호
• /
• pp.209-219
• /
• 2006

Toxoplasma gondii has been shown to result in life-threatening encephalitis in immunocompromised patients after reactivation of dormant parasites. In order to obtain information on immune responses related to this phenomenon, BALB/c mice were infected with 25 cysts of the 76K strain of T. gondii, then, treated orally with dexamethasone (Toxo/Dexa-treated group) in order to reactivate the chronic toxoplasmosis. None of the T. gondii-infected mice died during the experimental periods, whereas the Toxo/Dexa-treated mice evidenced a significant attenuation of survival periods. Toxoplasma-specific IgG2a, IgA and IgM titers in sera were significantly depressed in the Toxo/Dexa-treated mice; however, the IgG1 sera titers were similar to those seen in the Toxoplasma-infected mice. The percentages of CD4+ and $CD8\alpha+$ T cells in the Toxo/Dexa-treated mice were significantly reduced 2 weeks after dexamethasone treatment. $IFN-\gamma$ and IL-10 production levels in the Toxo/Dexa-treated mice were depressed significantly, whereas IL-4 production was increased temporarily. The expression levels of the Toxoplasma-specific P30 and B1 genes were found to have been increased in the Toxo/Dexa-treated mice in comparison with the Toxoplasma-infected mice. Collectively, the findings of this study demonstrate that reactivation of murine toxoplasmosis as the result of dexamethasone treatment induced a depression in Th1 immune responses, whereas Th2 immune responses were not significantly influenced.

• Pediatric Infection and Vaccine
• /
• 제27권2호
• /
• pp.134-139
• /
• 2020

표피 포도알균은 사람 피부에 있는 정상균이나, 체내 이물질을 가진 사람이나 면역 저하자에게는 심각한 감염을 일으킬 수 있다. 13세 남자가 발열, 근육통으로 입원하였고 두피, 팔과 다리에 통증이 있는 결절성 병변이 만져졌다. 혈액검사에서 범혈구 감소증과 모세포 80% 소견을 보였고 급성 골수성 백혈병으로 진단되었다. 전신 자기공명영상 검사에서 가장자리 조영 증강을 보이는 다발 낭성 병변이, 초음파 검사에서 에코성 낭성 병변과 그 내부의 에코성 결절이 팔과 다리의 근육 내부에서 관찰되어, 낭미충증이 강력히 의심되었다. 그러나 초음파 유도하 조직 검사에서 농양이 확인되었고, 조직 배양검사에서 표피 포도알균이 동정되었다. 저자들은 백혈병 환자에서 낭미충증으로 오인되었던 표피 포도알균에 의한 전신 다발 병변이 발생한 예를 경험하였기에 보고하는 바이다.