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학술저널
저자정보
임승택 (울산대학교 의과대학 서울아산병원 진단검사의학과) 설승환 (울산대학교 의과대학 서울아산병원 진단검사의학과) 원은정 (울산대학교) 박보성 (울산대학교 의과대학 서울아산병원 진단검사의학과) 성흥섭 (울산대학교) 김미나 (울산대학교)
저널정보
대한임상미생물학회 Annals of Clinical Microbiology Annals of Clinical Microbiology 제27권 제3호
발행연도
2024.9
수록면
205 - 216 (12page)
DOI
10.5145/ACM.2024.27.3.4

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Background: Unlike the Mycoplasma IST2 kit (bioMérieux), the Mycoplasma IST3 kit hasbeen updated to comply with the standardized antimicrobial susceptibility test (AST) methodfor Ureaplasma spp. (Up) and Mycoplasma hominis (Mh). We aimed to verify the use of theMycoplasma IST3 kit for genital mycoplasma cultures. Methods: From September 2023 to January 2024, the R1 medium remaining after inoculationwith IST2 was refrigerated until the next day. For IST2-positive samples, 300 μL of residual R1medium was inoculated into the IST3. Species identification, enumeration, and AST resultsobtained using IST3 were compared with those obtained using IST2. Results: A total of 48 IST2-positive samples were inoculated into IST3, including 35, 1, and12 Up-only, Mh-only, and both Up- and Mh-positive samples, respectively. Among Up-onlysamples, 2.8%, 91.4%, and 100.0% were susceptible to ciprofloxacin, tetracycline, anderythromycin, respectively. With IST3, 45 (93.8%) samples grew genital mycoplasmas; 42(89.4%) of the 47 Up-positive samples and 6 (46.2%) of the 13 Mh-positive samples showedgrowth of the same organisms. All seven samples that failed to grow Mh were from mixedcultures, of which four Mh concentrations of < 104/mL. Up was susceptible to levofloxacin,tetracycline, and erythromycin at the rates of 64.3 %, 88.1 %, and 95.2 %, respectively. Conclusion: IST3 showed good performance in detecting genital Mycoplasma except forits tendency to not detect Mh of low concentrations in mixed cultures. IST3 is preferable toIST2 because it can accurately screen for erythromycin resistance in Up and reduce falseresistances for fluoroquinolone.

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