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논문 기본 정보

자료유형
학술저널
저자정보
Mohammed Hassan (University of Nebraska at Kearney) Seoung-ryoung Choi (University of Nebraska Medical Center)
저널정보
한국미생물학회 미생물학회지 미생물학회지 제61권 제1호
발행연도
2025.3
수록면
73 - 82 (10page)

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초록· 키워드

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The quality of water in pharmaceutical systems is critical, influencing the final product’s safety and efficacy. This study investigates the heat resistance of oligotrophic bacteria in pharmaceutical water systems, focusing on their survival at various temperatures. Water samples were collected and analyzed for microbial bioburden, with bacterial identification performed using the VITEK<sup>®</sup> MS system. Heat tolerance assays were conducted at temperatures ranging from 40 to 90°C for up to 60 min, with results measured as colony-forming units per milliliter (CFU/ml). The study demonstrated that exposure to temperatures of 60°C or higher for 15 min effectively inhibited bacterial growth, whereas significant growth occurred at 40°C, highlighting the adaptability of the tested strains. At 50°C, a notable decrease in bacterial viability was observed, with species-specific differences in heat tolerance. Ralstonia pickettii and Sphingomonas paucimobilis were particularly sensitive to high temperatures, whereas Methylobacterium fujisawaense exhibited greater heat tolerance. These findings highlight the importance of understanding bacterial heat resistance to optimize sterilization processes and ensure compliance with regulatory standards. The study underscores the need for tailored microbial control strategies in pharmaceutical manufacturing, considering the diverse heat tolerance profiles of bacterial contaminants. Future research should explore a broader range of species and temperatures to enhance microbial management in pharmaceutical systems.

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Materials and Methods
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