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T 림프구 아형 측정에서 총 T 림프구 측정의 재현성 및 CD3+CD4-CD8- 세포군의 특성
성흥섭,권수진,박찬정,지현숙 대한진단검사의학회 2002 Annals of Laboratory Medicine Vol.22 No.2
배경 : T 림프구 아형 측정시, 총 T 림프구를 CD3-fluores-cein isothiocyanate (FITC)/CD4-phycoerythrin (PE) 측정시험관과 CD3-FITC/CD8-PE 측정 시험관의 결과에서 각각 구할 수 있으므로, 두 시험관의 측정치 차이를 구하여, 총 T 림프구 측정의 재현성을 평가할 수 있다. 일부 검체에서는 T 수용체에 대한 단클론항체를 이용하여 T 림프구를 측정하여이를 CD3+CD4-CD8- T 림프구와 비교하였다. 방법 : 21개 검체에 대하여 T 림프구 아형 검사를 시행하였다. Simultest IMK-Lymphocyte kit (Becton-Dickinson, SanJose, CA, USA)를사용하여 2색상 직접면역형광염색 후 유세포분석법을 시행하였다. 두 시험관에서 얻은 총 T 림프구 백분율의차가 3% 이상인 경우 검사의 전과정을 검색하고 재분석하였다.71개 검체는 T 림프구도 동시에 측정하였다. 결과 : 두 시험관에서 얻은 총 T 림프구 백분율의 차는 정상대조군, 만성 간질환자, 암환자, 기타 질환자, 소아에서 각각3.0%, 3.6%, 3.0%, 3.4%, 2.4%이었다. 전체 221검체 중 69검체(31.2%)에서 총 T 림프구 백분율의 차가 3% 이상이었다. T 림프구는 정상 대조군, 간질환자, 암환자, 기타 질환자에서 각각 0.81%, 2.46%, 2.50% and 0.85%이었으며, CD3+CD4-CD8-T 림프구와의 상관성은 없었다.
Rhinovirus, Human Metapneumovirus, Coronavirus 검출을 위한SeeplexTM RV Detection 키트의 평가
성흥섭,박숙자,우영대,최병후,김미나 대한진단검사의학회 2008 Annals of Laboratory Medicine Vol.28 No.2
Background : Direct antigen test (DAT) and culture are primary tests to diagnose infections by respiratory viruses, but are mainly available for the traditional viral pathogens such as respiratory syncytial virus (RSV), influenza virus, parainfluenza virus (PIV), and adenovirus in clinical laboratories. The objective of this study was to evaluate a multiplex reverse transcriptase-PCR method using SeeplexTM RV Detection kit (Seegene, Korea) for the detection of rhinovirus, coronavirus, and human metapneumovirus (hMPV). Methods : From January to May 2007, nasopharyngeal aspirates (NPAs) from pediatric patients negative for culture and DAT of traditional viral pathogens were tested with SeeplexTM. All the amplicons were directly sequenced and homology of the sequences was searched in the National Center for Biotechnology Information (NCBI) database. Patients’ medical records were reviewed for clinical and demographic features. Results : Forty-seven (26.4%) of 178 NPAs were positive: 18 rhinovirus, 15 hMPV, 4 RSV A, 3 coronavirus OC43, 3 influenza virus A, 2 adenovirus, 1 coronavirus NL63, and 1 RSV B. Based on maximum identity, each of the sequences indicating rhinovirus, hMPV, and coronavirus OC43 matched to the corresponding viruses with homology of 94-98%, 96-99%, and 98-100%, respectively. SeeplexTMpositive patients were 0-11 yr old with a male:female ratio of 1.5:1. Clinical diagnoses included 9 pneumonia, 6 bronchiolitis, 2 cold, 1 asthma exacerbation for rhinovirus; 10 pneumonia, 4 bronchiolitis, and 1 clinical sepsis for hPMV; and 1 pneumonia, 2 croup, and 1 cold for coronavirus. Conclusions : Multiplex reverse transcriptase-PCR method using SeeplexTM RV Detection kit is a reliable test to detect rhinovirus, hMPV, and coronavirus. It may improve the diagnostic sensitivity for RSV, influenza virus, PIV, and adenovirus. (Korean J Lab Med 2008;28:109-17)
vanA 유전자와 vanC1 유전자를 동시에 가진 Enterococcus gallinarum 1예
성흥섭,윤경아,김미나,배직현 대한진단검사의학회 2002 Annals of Laboratory Medicine Vol.22 No.1
저자들은 중환자실 감시배양을 통해 3년간 치료받던 환자에서vanA 와 vanC1 유전자를 동시에 가진 E. gallinarum을 분리하였다. E. gallinarum, SI04는 반코마이신에 고도내성(MIC of ≥256 g/mL) 이었으며, teicoplanin에도 고도내성(MIC of ≥256g/mL)이었다. vanA, vanB, vanC1, vanC2/3 내성형 결정을위하여 multiplex PCR을 시행한 결과 SI04에서 vanA 와 vanC1두 가지 유전자가 동시에 관찰되었다. 본 증례는 국내에서 처음으로 VanC형의 반코마이신 내성 장구균에서vanA 유전자가 존재함을 보여 주어, 반코마이신 내성 장구균의 임상적 의의를 판단하는데 내성 유전자의 검출이 필요하다는 것을 시사하였다.
디스크확산법에 의한 Helicobacter pylori의 Clarithromycin과 Amoxicillin 항균제감수성 검사
성흥섭,강정옥,이미애,이종욱,이혜경,이미경,임지훈,김미나,Helicobacter 연구회 대한임상미생물학회 2009 Annals of clinical microbiology Vol.12 No.1
Background: CLSI provides a guideline only for a agar dilution method of testing clarithromycin susceptibility for Helicobacter pylori. This study was to evaluate a disk diffusion method for clarithromycin and amoxicillin. Methods: One hundred and forty clinical isolates of H. pylori isolated from May 2005 to May 2007 were tested by the CLSI agar dilution method and a disk diffusion method using 2μg (2CLR) and 15μg (15CLR) clarithromycin disks and 2μg (2AMX) and 10μg (10AMX) amoxicillin disks. The interpretation criteria used for the disk diffusion method were established by linear regression and error rate-bounded method for disk diffusion zone of inhibition (DDZ) compared to MIC. Results: Resistance and intermediate rates to clarithromycin were 21.4% and 1.4%, respectively. A number of isolates with MIC 0.5, 1, and 2 (μg/mL) to amoxicillin were 7, 2, and 1, respectively. For 2CLR and 15CLR, the coefficients of determination (R2) between MIC and DDZ were 0.931 and 0.923 (P< 0.001), respectively, and the criteria for resistance/ susceptibility were 12/28 mm for 2CLR and 23/39 mm for 15CLR. For 2AMX and 10AMX, the R2 between MIC and DDZ were 0.478 and 0.421 (P< 0.001), respectively, and the criteria for resistance with breakpoint of 2μg/mL were 21 mm for 2AMX and 32 mm for 10AMX. All isolates had DDZ<60 mm with 2CLR and 2AMX, but 61.4% and 75.7% of the isolates had DDZ<60 mm with 15CLR and 10AMX, respectively. Conclusion: Excellent correlation and agreement between MIC and DDZ were found for clarithromycin and amoxicillin. With 2μg disks, the susceptibility breakpoints were 28 mm or less; thus, two disks could be tested in one plate.