Journal of microorganism control最新文献_第4页

Infection control and COVID-19 outbreak training at elderly care facilities. 老年护理机构的感染控制和新冠肺炎疫情培训。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.3_77

Naomi Sakurai, Junko Kurita, Shinobu Yamaguchi, Nami Kamioka, Tamie Sugawara, Yasushi Ohkusa

{"title":"Infection control and COVID-19 outbreak training at elderly care facilities.","authors":"Naomi Sakurai, Junko Kurita, Shinobu Yamaguchi, Nami Kamioka, Tamie Sugawara, Yasushi Ohkusa","doi":"10.4265/jmc.28.3_77","DOIUrl":"10.4265/jmc.28.3_77","url":null,"abstract":"Fatalities caused by pneumonia and underlying diseases from COVID-19 infection show the highest relative frequency among elderly people. Long-term care facilities for elderly people have continued to be the areas most vulnerable to COVID-19. We examined the effectiveness of training for infection control and COVID-19 at elderly care facilities. After sending questionnaires to all long-term elderly care facilities in Ibaraki prefecture, Japan during January 18-29, 2022, we received useful responses from 98 facilities. Using logistic regression, we regressed a dummy variable for outbreak experience to dummy variables representing routine but partial training, routine training for all staff members, long-term care facilities for elderly people, numbers of nurses, and numbers of residents. Outbreak experiences of two types were inferred, as represented by a dummy variable for a COVID-19 outbreak at the facility, and by a dummy variable for outbreak experience at the facility before COVID-19 was found. Multivariate analysis indicated routine training for all staff members as the most effective, in fact the only effective, countermeasure against COVID-19 outbreak.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 3","pages":"77-82"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49694877","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

Combined effects of microorganism control and the concept of their evaluation methods. 微生物控制的综合效果及其评估方法的概念。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.4_201

Tetsuaki Tsuchido

{"title":"Combined effects of microorganism control and the concept of their evaluation methods.","authors":"Tetsuaki Tsuchido","doi":"10.4265/jmc.28.4_201","DOIUrl":"10.4265/jmc.28.4_201","url":null,"abstract":"Various combination treatments are used for microorganism control in food, medicine, and the environment. Especially in food, combination treatments have been studied using antimicrobial compounds in pasteurization and sterilization but comprehensive quantitative evaluation methods, have not yet been established to evaluate their effectiveness. This review introduces the author's recently published methods for evaluating the effects of combination treatments on the control of harmful microorganisms in food. Particularly important items are 1) the type of action of the control treatment and the mode of the combined method, 2) the choice of endpoint method and growth delay method for analytical evaluation, 3) the construction of extended isobolography that allows the application of conventional isobologram (IBo) for chemicals to various control methods, 4) the extended use of combined index (CI）, and 5) the introduction of synergistic parameter (SP) for quantitative evaluation of synergistic effects. In addition, I describe the characteristics of the action of antimicrobial compounds and disinfectants in their combined effects with heating, and insist on the advantages of using combined treatments and their evaluation methods in the food industry.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 4","pages":"201-212"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139486720","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

Different patterns of germination inhibition by carvacrol and thymol in Bacillus subtilis spores. 香芹酚和百里香酚对枯草芽孢杆菌孢子萌发抑制的不同模式。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.1_3

Toshio Sakai, Jin J Sakamoto, Ryoko Asada, Masakazu Furuta, Tetsuaki Tsuchido

{"title":"Different patterns of germination inhibition by carvacrol and thymol in Bacillus subtilis spores.","authors":"Toshio Sakai, Jin J Sakamoto, Ryoko Asada, Masakazu Furuta, Tetsuaki Tsuchido","doi":"10.4265/jmc.28.1_3","DOIUrl":"https://doi.org/10.4265/jmc.28.1_3","url":null,"abstract":"This study aimed to clarify how the phenolic monoterpene carvacrol and its structural isomer thymol both as essential oil components (EOCs) inhibit the germination of Bacillus subtilis spore. Germination was evaluated by the OD600 reduction rate in a growth medium and phosphate buffer containing either l-alanine (l-Ala) system or l-asparagine, d-glucose, d-fructose plus KCl (AGFK) system. The germination of the wild-type spores in the Trypticase Soy broth (TSB) was found to be greatly inhibited by thymol than by carvacrol. Such a difference in the germination inhibition was confirmed by the dipicolinic acid (DPA) release from germinating spores in the AGFK buffer system, but not in the l-Ala system. Similar to the wild-type spores, no difference in the inhibitory activity between the EOCs was also indicated with the gerB, gerK-deletion mutant spores in the l-Ala buffer system and the above substantial difference was also done with the gerA-deleted mutant spores in the AGFK. Fructose was found to release spores from the EOC inhibition and inversely even stimulated. Increased concentrations of glucose and fructose partially suppressed the germination inhibition by carvacrol. The results obtained should contribute to the elucidation of the control effects of these EOCs on bacterial spores in foods.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 1","pages":"3-13"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9588437","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

Self-decomposition and half-life time of gaseous hypochlorous acid. 气态次氯酸的自分解和半衰期。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.2_65

Tetsuyoshi Yamada, Takashi Muramatsu, Tatsuya Kiriyama, Satoshi Fukuzaki

引用次数: 0

Evaluation of the effect of peptidoglycan-constituting components on photocatalytic bactericidal sterilization. 肽聚糖组成成分对光催化杀菌杀菌效果的评价。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.3_117

Haruka Motomura, Tomonori Suzuki

{"title":"Evaluation of the effect of peptidoglycan-constituting components on photocatalytic bactericidal sterilization.","authors":"Haruka Motomura, Tomonori Suzuki","doi":"10.4265/jmc.28.3_117","DOIUrl":"10.4265/jmc.28.3_117","url":null,"abstract":"Previous studies in our lab have shown that peptidoglycan (PG) enhances the photocatalytic bactericidal effect. Therefore, in this study, we focused on the PG-constituting components. The PG-constituting components were added to Mesoplasma florum with no cell wall, respectively, and their effects on photocatalytic sterilization were investigated. The PG-constituting components used were amino sugars, amino acids, L-Alanine-D-Glutamic Acid (L-Ala-D-Glu) dipeptide of diaminopimelic acid (DAP）-type crosslinking peptide, and Lysine (Lys）-type crosslinking peptide. We compared the survival rates of M. florum cells and PG-constituting components-added M. florum cells after 3 h of photocatalytic reaction. Consequently, the survival rates of the cells that were added N-acetylglucosamine (GlcNAc）, DAP, and L-Ala- D-Glu dipeptide were significantly lower than those of only the cells. Furthermore, the amounts of hydrogen peroxide (H2O2) generated by the photocatalytic reaction under the presence of these components were determined. The results showed that DAP, L-Ala- D-Glu dipeptide, and PG of DAP-type significantly increased the amount of H2O2 produced. From the above results, it is suggested that the presence of DAP and L-Ala- D-Glu dipeptide in the photocatalytic reaction boosts the production of H2O2 and enhances the bactericidal effect and that GlcNAc might produce reactive oxygen species other than H2O2.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"28 3","pages":"117-122"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49694866","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

Possible solution of capturing viable Enterohemorrhagic Escherichia coli (EHEC) in clinical patient stool. 在临床患者粪便中捕获活肠出血性大肠杆菌（EHEC）的可能解决方案。

Journal of microorganism control Pub Date : 2023-01-01 DOI: 10.4265/jmc.28.3_129

Hajime Teramura, Sachie Sanga, Kanako Kodama

引用次数: 0

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