Journal of microorganism control最新文献_第5页

Sustainable development for new era of microorganism control. 可持续发展助力微生物治理新时代。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.1_1

Satoshi Fukuzaki, Tetsuaki Tsuchido

引用次数: 0

Simple and quick detection of extended-spectrum β-lactamase and carbapenemase-encoding genes using isothermal nucleic acid amplification techniques. 利用等温核酸扩增技术简单快速地检测广谱β-内酰胺酶和碳青霉烯酶编码基因。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.4_145

Tatsuya Nakayama, Keisuke Soga

引用次数: 0

Changes in bacterial diversity and community structure in drinking water distribution system revealed by high throughput sequencing. 高通量测序揭示饮用水配水系统细菌多样性和群落结构变化。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.1_27

Yoshihiko Koizumi, Tomoaki Ichijo, Kimiko Uchii, Masao Nasu

{"title":"Changes in bacterial diversity and community structure in drinking water distribution system revealed by high throughput sequencing.","authors":"Yoshihiko Koizumi, Tomoaki Ichijo, Kimiko Uchii, Masao Nasu","doi":"10.4265/jmc.28.1_27","DOIUrl":"https://doi.org/10.4265/jmc.28.1_27","url":null,"abstract":"For microbiological management of water quality, it is important to identify bacteria and to understand the community structure. To analyze the community structure during water purification and distribution, we selected a distribution system in which water from other water treatment facilities was not mixed with the target water. Changes in the bacterial community structure during treatment and distribution processes in a slow filtration water treatment facility were analyzed using 16S rRNA gene amplicon sequencing with a portable sequencer MinION. The microbial diversity was reduced by chlorination. The genus level diversity increased during distribution and this diversity was maintained through to the terminal tap water. Yersinia and Aeromonas were dominant in the intake water, and Legionella was dominant in the slow sand filtered water. Chlorination greatly reduced the relative abundance of Yersinia, Aeromonas, and Legionella, and these bacteria were not detected in the terminal tap water. Sphingomonas, Starkeya and Methylobacterium became dominant in the water after chlorination. These bacteria could be used as important indicator bacteria to provide useful information for microbiological control in drinking water distribution systems.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 1","pages":"27-34"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9582669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Uses of gaseous hypochlorous acid for controlling microorganisms in indoor spaces. 气态次氯酸用于控制室内空间的微生物。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.4_165

Satoshi Fukuzaki

{"title":"Uses of gaseous hypochlorous acid for controlling microorganisms in indoor spaces.","authors":"Satoshi Fukuzaki","doi":"10.4265/jmc.28.4_165","DOIUrl":"10.4265/jmc.28.4_165","url":null,"abstract":"Hypochlorous acid (HOCl) is an active species in the chlorination process. Hypochlorite salts that release hypochlorite ion (OCl-) have been used for more than 200 years as disinfecting, cleaning, deodorizing, and decolorizing agents in various technological fields. In the food industry, sodium hypochlorite is the most widely used among chlorine compounds. The antimicrobial activity of a dilute hypochlorite solution is attributed largely to HOCl because of its cell membrane permeability. OCl- exhibits an excellent cleaning action for organic soils on solid surfaces. HOCl has been used as an aqueous solution, and its objects to be treated are things. In hypochlorite solution, HOCl is volatile and easily volatilized by stirring, bubbling, atomizing, or forced-air vaporization. On the other hand, OCl- is non-volatile and stays in the solution. Recently, the scope of objects to be treated with hypochlorite solution has been expanded to indoor spaces, and the use of gaseous hypochlorous acid (HOCl（g) ) has been studied intensively. This review describes the mechanisms of actions of hypochlorous acid as liquid-based and gaseous disinfectants and provides the evidence for the safety and effectiveness of HOCl（g) for controlling microorganisms in indoor spaces.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 4","pages":"165-175"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139486742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inactivation mechanism of SARS-CoV-2 by ozone in aqueous and gas phases. 臭氧在水相和气相中灭活SARS-CoV-2的机理

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.2_43

Yoshinori Nishiki, Tatsuya Imazu, Katsuhiko Nakamuro, Hirotaka Naitou, Koichi Jeremiah Aoki

{"title":"Inactivation mechanism of SARS-CoV-2 by ozone in aqueous and gas phases.","authors":"Yoshinori Nishiki, Tatsuya Imazu, Katsuhiko Nakamuro, Hirotaka Naitou, Koichi Jeremiah Aoki","doi":"10.4265/jmc.28.2_43","DOIUrl":"https://doi.org/10.4265/jmc.28.2_43","url":null,"abstract":"The comparison of the inactivation rate of SARS-CoV-2 by ozone in water with that in gas, based on data from references and experiments, has indicated the inactivation rate of the former is remarkably higher than that of the latter. To investigate the reason for this difference, we analyzed the reaction rate using a diffusional reaction model, in which ozone is carried by micro spherical viruses to inactivate the target viruses. Using this model, we can evaluate the amount of ozone required to inactivate a virus based on the ct value. We found that inactivation in gas phase requires 1014-1015 ozone molecules per virus virion, while the inactivation in aqueous phase requires 5×1010 to 5×1011 ozone molecules. This implies that the efficiency in gas phase is 200-20,000 times lower than that in aqueous phase. This is not attributed to the lower probability of collision in gas phase than in aqueous phase. Rather, it may be due to the fact that the ozone and radicals generated by ozone react and subsequently dissipate. We proposed the diffusion of ozone into a spherical virus at a steady state and the decomposition reaction model through radicals.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 2","pages":"43-48"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9743831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theory and application of growth delay analysis of colony formation for evaluation of injured population of the stressed fungal conidia. 菌落形成生长延迟分析在真菌分生孢子损伤种群评估中的理论和应用。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.3_93

Ryoko Asada, Yoshie Yamada, Jin J Sakamoto, Masakazu Furuta, Tetsuaki Tsuchido

{"title":"Theory and application of growth delay analysis of colony formation for evaluation of injured population of the stressed fungal conidia.","authors":"Ryoko Asada, Yoshie Yamada, Jin J Sakamoto, Masakazu Furuta, Tetsuaki Tsuchido","doi":"10.4265/jmc.28.3_93","DOIUrl":"10.4265/jmc.28.3_93","url":null,"abstract":"A new concept of injured population assessment is proposed, in which the size of the injured population in stressed mold spores is evaluated by analyzing the colony formation process on a solid agar medium. In this method, a small paper disc containing mold spores is placed on a subculture agar plate, and the linear increase in the radius of the colony formed by development from the spore is measured over time. Then, the principle of the previously reported growth delay analysis (GDA) method originally using a liquid medium is applied to obtain the integrated viable ratio (IV) of the stressed population from the delay time relative to the growth of the unstressed population. On the other hand, the viable ratio (V) to the initial value as the colony count obtained with the stressed culture is obtained; the difference between the logarithms of V and IV is determined as the log number of the injured population. Applying this analysis method to heated spores of Cladosporium sphaerospermum, we determined the size of the injured population that occurred. This method was considered to be effective as a new method for quantifying injured populations using a solid medium.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 3","pages":"93-100"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49694882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Common presence of plasmid encoding bla_CTX-M-55 in extended-spectrum β-lactamase-producing Salmonella enterica and Escherichia coli isolates from the same edible river fish. 编码blaCTX-M-55的质粒在产β-内酰胺酶的肠炎沙门氏菌和大肠杆菌分离株中普遍存在。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.2_49

Tatsuya Nakayama, Shiori Yamamoto, Natsuki Ohata, Takahiro Yamaguchi, Michio Jinnai, Doan Tran Nguyen Minh, Oanh Nguyen Hoang, Hien LE Thi, Phong Ngo Thanh, Phuong Hoang Hoai, Phuc Nguyen DO, Chinh Dang VAN, Yuko Kumeda, Atsushi Hase

{"title":"Common presence of plasmid encoding blaCTX-M-55 in extended-spectrum β-lactamase-producing Salmonella enterica and Escherichia coli isolates from the same edible river fish.","authors":"Tatsuya Nakayama, Shiori Yamamoto, Natsuki Ohata, Takahiro Yamaguchi, Michio Jinnai, Doan Tran Nguyen Minh, Oanh Nguyen Hoang, Hien LE Thi, Phong Ngo Thanh, Phuong Hoang Hoai, Phuc Nguyen DO, Chinh Dang VAN, Yuko Kumeda, Atsushi Hase","doi":"10.4265/jmc.28.2_49","DOIUrl":"10.4265/jmc.28.2_49","url":null,"abstract":"The transmission of potentially life-threatening plasmid-mediated antibiotic-resistant bacteria poses a major threat to public health. This study aimed to determine the presence of commonly observed plasmids encoding plasmid-mediated antibiotic-resistance genes in Salmonella and Escherichia coli isolates from fishery products. Eighty river fishes were purchased from retail stores and supermarkets in Vietnam. Only Salmonella-positive fishes were used for antibiotic-resistant E. coli isolation. Salmonella serotyping was performed using Salmonella antisera. Isolated bacterial DNA was extracted, and antibiotic susceptibility, resistance genes, and replicon typing were determined. Our results showed that Salmonella was isolated from 12.5% (10/80) of the river fishes. Cefotaxime-resistant Salmonella was isolated from 3.8% (3/80) of the fishes and colistin-resistant Salmonella from 1.3% (1/80) . Salmonella serotyping revealed Potsdam, Schwarzengrund, Bardo/Newport, Give, Infantis, Kentucky, and Typhimurium. Multiplex polymerase chain reaction revealed the presence of extended-spectrum β-lactamase-related genes blaCTX-M-55 and blaCTX-M-65 and the colistin resistance gene mcr-1. To date, no study has reported an antibiotic-resistance plasmid present in multiple bacteria collected from the same food. Thus, horizontal transmission of antibiotic-resistance plasmids may occur at the food level.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 2","pages":"49-56"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10120753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Five-year trends in bacterial contamination of dialysis equipment. 透析设备细菌污染的五年趋势。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.3_69

Eiichi Osono, Kazumi Honda, Yuki Inoue, Kyouko Ichimura, Chisako Kamano, Shinya Kawamoto, Yoshihiko Norose, Shun Takaku, Rimpei Morita, Tetsuaki Tsuchido

{"title":"Five-year trends in bacterial contamination of dialysis equipment.","authors":"Eiichi Osono, Kazumi Honda, Yuki Inoue, Kyouko Ichimura, Chisako Kamano, Shinya Kawamoto, Yoshihiko Norose, Shun Takaku, Rimpei Morita, Tetsuaki Tsuchido","doi":"10.4265/jmc.28.3_69","DOIUrl":"10.4265/jmc.28.3_69","url":null,"abstract":"Bedside dialysis monitoring equipment for hemodialysis are located in the bioburden section upstream of the endotoxin-retentive filter for dialysis fluid sterilization. We observed 26 equipment at our institution for bacterial contamination at least once every 4 weeks for 5 years with another ultrafiltration membrane upstream to prevent bacterial contamination. Bacterial contamination levels were highest and most diverse at the time of the first flush. During subsequent initial cleanng, the contamination level decreased, and bacterial species converged almost exclusively to one genus, namely Methylobacterium spp. During clinical use, the equipment were cleaned and disinfected daily after dialysis, and daily operations and maintenance were performed using aseptic techniques. Although the frequency of bacterial detection decreased annually, the same bacterial genotypes observed at the first flush were isolated even after long time periods and were thought to persist in the equipment possibly by forming biofilm. Pseudomonas aeruginosa was newly detected after the replacement of parts during breakdown maintenance, indicating the need to sterilize replacement parts. Thus, the bioburden should be assessed regularly as part of the management of in-house-produced dialysis fluid.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 3","pages":"69-75"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49694867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New synergistic antibacterial mechanism of bulky mixed Ti/w hetero-polyoxometalates composed of multi lacunary Keggin structure with oxacillin against vancomycin intermediate-resistant Staphylococcus aureus. 由多空隙Keggin结构和苯唑西林组成的大体积混合Ti/w杂多金属氧酸盐对万古霉素中间体耐药金黄色葡萄球菌的协同抗菌新机制。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.3_101

Jun Iijima, Toshihiro Yamase

{"title":"New synergistic antibacterial mechanism of bulky mixed Ti/w hetero-polyoxometalates composed of multi lacunary Keggin structure with oxacillin against vancomycin intermediate-resistant Staphylococcus aureus.","authors":"Jun Iijima, Toshihiro Yamase","doi":"10.4265/jmc.28.3_101","DOIUrl":"10.4265/jmc.28.3_101","url":null,"abstract":"Considering the lack of detailed research on the antibacterial mechanism of polyoxometalates, we examined the synergistic effect of novel bulky mixed Ti/W hetero-polyoxometalates (K9.5H2.5 ［α-Ge2Ti4W20O78］・ 29H2O; αTi4, K9H5 ［α-Ge2Ti6W18O77］・16H2O; αTi6, K23H5［α-Ge4Ti12W36O154］・39H2O; αTi12, K9H5 ［β-Ge2Ti6W18O77］・ 45H2O; βTi6) with the antibiotic oxacillin against vancomycin intermediate-resistant Staphylococcus aureus (VISA) using fractional inhibitory concentration (FIC) index and growth curve in this study. All polyoxometalates used in this study showed remarkable synergistic effects with oxacillin. Its synergistic antibacterial mechanism was examined using reverse transcription PCR (RT-PCR) and penicillin binding protein-2' (PBP2') latex agglutination test. The results suggested that these polyoxometalates did not inhibit mecA gene transcription but resulted in PBP2' protein malfunction. From these results, we concluded that the substances producing resistance in VISA were affected by polyoxometalates depending on their molecular size, facilitating a synergistic antibacterial effect with oxacillin.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 3","pages":"101-107"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49694879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Current circumstances and prospects on performance evaluation for infection control technologies of airborne viruses in indoorenvironments. 室内环境中空气传播病毒感染控制技术性能评估的现状与前景。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.4_177

Noriko Shimasaki

{"title":"Current circumstances and prospects on performance evaluation for infection control technologies of airborne viruses in indoorenvironments.","authors":"Noriko Shimasaki","doi":"10.4265/jmc.28.4_177","DOIUrl":"10.4265/jmc.28.4_177","url":null,"abstract":"Respiratory infectious diseases have potential of aerosol transmission such as COVID-19. The development of new technologies for infection control against airborne viruses are further required. It is necessary for effective development to evaluate properly the effect and role of these technologies in indoor environment. Here, the author provided essential knowledge for infection control of viral aerosols, i.e., basic concept of infection control, features of COVID-19 and Influenza including the entry receptor in body of each virus, behavior of the viral aerosols released from patient bodies, and Wells-Riley model as a traditional quantitative assessment of the infection risk by aerosol transmission. Previous evaluation studies on airborne viruses were categorized into three types of experiments, namely, in vitro, in vivo, and in humans and real indoor environments. Some prospects were described, including standard evaluation methods for air cleaners, the research group to formulate guidelines for evaluating the hygienic effects of chemical substances on microbes in real indoor space, and personal opinions on evaluation concept linked to three types of experiments. This minireview may help to correctly evaluate the hygienic effects of control technologies against airborne viruses in indoor environment and to contribute development of technologies with required performance according to infection risk.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 4","pages":"177-186"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139486724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0