Journal of microorganism control最新文献_第3页

Development of an Alternative to Preservation Efficacy Tests Using the Metabolic Activity of Microorganisms. 利用微生物代谢活性进行保鲜效果试验的替代方法的发展。

Journal of microorganism control Pub Date : 2025-01-01 DOI: 10.4265/jmc.30.3_71

Mai Watanabe, Asako Mitani, Jun Sato, Takumi Sonoda, Naofumi Shigemune

{"title":"Development of an Alternative to Preservation Efficacy Tests Using the Metabolic Activity of Microorganisms.","authors":"Mai Watanabe, Asako Mitani, Jun Sato, Takumi Sonoda, Naofumi Shigemune","doi":"10.4265/jmc.30.3_71","DOIUrl":"https://doi.org/10.4265/jmc.30.3_71","url":null,"abstract":"Consumer products such as detergents, fabric softeners, and cosmetics are typically used in various environments. Manufacturers must ensure the quality of products and ensure their safety through their lifecycle, from manufacturing to usage. Preservation efficacy testing (PET) is typically conducted to determine the preservative of a product prior to use. However, PET is time-consuming and laborious due to its long-term storage and culture-based detection methods. In this study, we focused on the metabolic activities of microorganisms and developed a rapid alternative to PET. We observed that 72 h of preservation was sufficient to predict preservation efficacy using the metabolic activity method. Finally, the accuracy of the metabolic activity method was compared to that of PET using a variety of products such as detergents and cosmetics. The accuracy of this alternative method exceeds 85% for highly fluid and easy-to-handle samples. These results suggest that the developed metabolic activity method possesses the potential to determine the preservative efficacy of products in only four days（72 h of preservation and 24 h of detection）. Thus, this method possesses the potential to provide a rapid and simple alternative to PET.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"30 3","pages":"71-79"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145208307","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

Innovative approaches to bacterial inactivation in marine fish aquaculture: strategies for vaccine and paraprobiotic development. 海洋鱼类养殖中细菌灭活的创新方法：疫苗和副益生菌开发策略。

Journal of microorganism control Pub Date : 2025-01-01 DOI: 10.4265/jmc.30.4_107

Mohammad Tamrin Mohamad Lal, Zy Chee Wong, Zarina Amin, Abdul Aziz Jaziri, Asep Awaludin Prihanto, Abd Aziz Amin, Uun Yanuhar

{"title":"Innovative approaches to bacterial inactivation in marine fish aquaculture: strategies for vaccine and paraprobiotic development.","authors":"Mohammad Tamrin Mohamad Lal, Zy Chee Wong, Zarina Amin, Abdul Aziz Jaziri, Asep Awaludin Prihanto, Abd Aziz Amin, Uun Yanuhar","doi":"10.4265/jmc.30.4_107","DOIUrl":"https://doi.org/10.4265/jmc.30.4_107","url":null,"abstract":"Bacterial diseases are among the primary constraints to marine fish aquaculture, which negatively impacting the health and economic viability of fish. Vaccines and paraprobiotics are being formulated as efficacious and sustainable alternatives to antibiotics in disease prevention and health management. Efficient inactivation of the bacterial pathogens without compromising their structural and immunogenic integrity is paramount to the formulation of such biological remedies. In this review, recent advances in methods of bacterial inactivation, including chemical treatments, ultrashort pulse lasers (USPL) , high hydrostatic pressure (HHP) , photodynamic inactivation (PDI) , and gamma irradiation, are addressed. Each method has its own advantages and limitations, indicating that a clear understanding of their mechanisms and uses is essential. Together, these novel methods have excellent potential for the improvement of bacterial control strategies in aquaculture systems. Future research needs to prioritize the optimization of these techniques for scale, safety, and regulatory compliance to enable broader application in marine fish farming. The incorporation of such technologies may lead to a resilient, more productive, and sustainable aquaculture industry.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"30 4","pages":"107-113"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145758281","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

High rate pervaporation and disinfection efficacy of hypochlorous acid in vacuum-driven membrane process. 真空膜工艺中次氯酸的高渗透汽化率及消毒效果。

Journal of microorganism control Pub Date : 2025-01-01 DOI: 10.4265/jmc.30.4_121

Ayaka Sakurai, Chisato Shimada, Satoshi Fukuzaki

{"title":"High rate pervaporation and disinfection efficacy of hypochlorous acid in vacuum-driven membrane process.","authors":"Ayaka Sakurai, Chisato Shimada, Satoshi Fukuzaki","doi":"10.4265/jmc.30.4_121","DOIUrl":"https://doi.org/10.4265/jmc.30.4_121","url":null,"abstract":"This study investigated the pervaporation of hypochlorous acid (HOCl) using a vacuum-driven process with a separation module containing 6,000 silicone rubber (SR) hollow fibers. Gaseous hypochlorous acid (HOCl(g)) discharged from the membrane module was accumulated in a 1 m3 chamber. Weakly acidic (pH 5.0) hypochlorite solutions with free available chlorine (FAC) concentrations of 100-1,000 mg/L were fed through the lumen of the SR hollow fibers. Both the HOCl permeation rate and the steady-state HOCl(g) concentration increased with the feed FAC concentration. When a 1,000 mg/L hypochlorite solution was used, the HOCl(g) concentration in the chamber reached 5,500 ppb within 40 min. This accumulated HOCl(g), when applied to microorganisms on wet agar plates at a concentration of approximately 320 ppb, achieved a >3-log reduction in viable bacterial cells within 10 min and fungal spores within 20 min. These results demonstrate that high-rate pervaporation of HOCl can be achieved using an SR hollow fiber membrane in a vacuum-driven process, and the resulting HOCl(g) is effective for rapid disinfection.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"30 4","pages":"121-124"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145758736","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

A theoretical model for evaluating a specific mode of lethal injury that causes reproductive death in an irradiated microbial population. 一个理论模型，用于评估一种特定模式的致命伤害，导致生殖死亡的辐照微生物群体。

Journal of microorganism control Pub Date : 2025-01-01 DOI: 10.4265/jmc.30.2_55

Tetsuaki Tsuchido, Khanh C Vo, Ryoko Asada, Masakazu Furuta

引用次数: 0

Volatilization of gaseous hypochlorous acid from calcium hypochlorite product induced by the deliquescent property of calcium chloride. 氯化钙潮解特性引起的次氯酸钙产品气态次氯酸的挥发。

Journal of microorganism control Pub Date : 2025-01-01 DOI: 10.4265/jmc.30.1_13

Soshi Omura, Hideyuki Seki, Mami Ishikawa, Satoshi Fukuzaki

{"title":"Volatilization of gaseous hypochlorous acid from calcium hypochlorite product induced by the deliquescent property of calcium chloride.","authors":"Soshi Omura, Hideyuki Seki, Mami Ishikawa, Satoshi Fukuzaki","doi":"10.4265/jmc.30.1_13","DOIUrl":"10.4265/jmc.30.1_13","url":null,"abstract":"The commercial products of calcium hypochlorite (Ca（OCl) 2) , a solid hypochlorite salt, are hygroscopic because of the presence of calcium chloride as an impurity. In this study, we investigated the volatilization of gaseous hypochlorous acid (HOCl (g) ) from Ca (OCl) 2 tablets and its disinfection efficacy against Staphylococcus aureus on wet agar plates were studied in a 75 m3 room. HOCl (g) volatilization occurred spontaneously and continuously, even in ambient air. Under airflow conditions, the absorption of water vapor from the air into the Ca (OCl) 2 tablet was accelerated, and numerous droplets were formed on the tablet surface. The deliquescent property of calcium chloride indices these phenomena. When a glass Petri dish containing 10 Ca (OCl) 2 tablets was placed in the room under airflow conditions, HOCl (g) volatilization of was enhanced, and the HOCl (g) concentration in the room was maintained within the range of 60‒80 ppb for at least 24 h of volatilization. Viable S. aureus count on wet agar plates placed on the floor 1‒5 m away from the tablets decreased by 3.1-log after 1.5 h of exposure. This study indicates that sufficient concentrations of HOCl (g) can be volatilized from Ca (OCl) 2 tablets without the use of water, contributing to the disinfection of attached bacteria.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"30 1","pages":"13-17"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143732875","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

The detection method for malodor in cotton fabrics and the impact of disinfection on malodor suppression. 棉织物中恶臭的检测方法及消毒对恶臭抑制的影响。

Journal of microorganism control Pub Date : 2025-01-01 DOI: 10.4265/jmc.30.3_89

Hiroaki Okuda, Mugihei Ikemizu, Yoshinobu Matsumura

引用次数: 0

Assessment of residual contamination on dental instruments after infection control practices. 感染控制后牙科器械残留污染的评估。

Journal of microorganism control Pub Date : 2025-01-01 DOI: 10.4265/jmc.30.3_63

Kyoungnam Kim, Soomyoung Bae, Hyojin Lee, Hyeyoung Yoon

{"title":"Assessment of residual contamination on dental instruments after infection control practices.","authors":"Kyoungnam Kim, Soomyoung Bae, Hyojin Lee, Hyeyoung Yoon","doi":"10.4265/jmc.30.3_63","DOIUrl":"https://doi.org/10.4265/jmc.30.3_63","url":null,"abstract":"This study aimed to compare and assess residual microorganisms and organic materials on selected dental instruments after practicing two infection control methods, including the standard protocol. Scaler tips (ST) , 3-way syringe tips（3ST) , Bristle brushes（BB) , and Rubber cups（RC) were collected and grouped into Standard (Group S) and Non-standard (Group N) for processing. In ST and 3ST, Group S was cleaned and autoclaved, while Group N was disinfected. For BBs and RCs, Group N was cleaned and autoclaved, and new instruments were used as Group S. To confirm the presence of residual microorganisms, instruments from each group were incubated in liquid and solid medium. The generated colonies on solid medium were identified at the species level by polymerase chain reaction (PCR) . To confirm the presence of residual organisms, each instrument was stained with Phloxine B and observed using a stereomicroscope. Only ST（8.0%) and 3ST (28.0%) samples from Group N were detected with residual microorganisms. The identified colonies included Staphylococcus, Cupriavidus, and Streptococcus spp. Residual organics were observed in all samples from Group S and N. These findings highlight the limitations of cleaning followed by autoclaving and especially disinfection in completely eradicating all microorganisms and organics.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"30 3","pages":"63-70"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145208644","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

The generation of hydrogen peroxide and antibacterial effectiveness by copper oxide surface layers. 过氧化氢的产生和抗菌效果由氧化铜表面层。

Journal of microorganism control Pub Date : 2025-01-01 DOI: 10.4265/jmc.30.1_19

Yurika Taniguchi, Hiroshi Kawakami, Sadao Komemushi, Ken Hirota, Takashi Ozawa, Kazunori Miyamoto, Hiroaki Nakayama, Masahiko Wada

{"title":"The generation of hydrogen peroxide and antibacterial effectiveness by copper oxide surface layers.","authors":"Yurika Taniguchi, Hiroshi Kawakami, Sadao Komemushi, Ken Hirota, Takashi Ozawa, Kazunori Miyamoto, Hiroaki Nakayama, Masahiko Wada","doi":"10.4265/jmc.30.1_19","DOIUrl":"10.4265/jmc.30.1_19","url":null,"abstract":"Copper is known as an antibacterial material. Reactive oxygen species (ROS) with antibacterial effectiveness are generated on copper surfaces mainly by the Fenton-type reaction. The antibacterial effectiveness is higher in Cu2O than in CuO. In this study we discussed the effects of the difference in the amount of generated ROS on the difference in the antibacterial effectiveness between Cu2O and CuO. Both Cu2O and CuO produced hydrogen peroxide (H2O2）, hydroxyl radical(･OH）, and singlet oxygen (1O2）, but not superoxide radical (･O2-）. The concentration of H2O2 produced was higher in Cu2O than in CuO. When catalase, a scavenger of H2O2, was added, the antibacterial activities of both Cu2O and CuO reduced to almost the same value. These experimental results indicate that Cu2O is higher in antibacterial effectiveness than CuO because Cu2O produced more H2O2 than CuO. As ･OH was detected even when H2O2 was scavenged by catalase before it reacted with Cu ion, a part of ･OH was generated by chemical reactions different from the Fenton-type reaction when copper oxides were in contact with water.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"30 1","pages":"19-26"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143732589","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

Antifungal activity of alkaloids from aqueous extract of Coptis chinensis against Nigrospora sphaerica. 黄连水提物生物碱对球形黑孢菌的抑菌活性研究。

Journal of microorganism control Pub Date : 2025-01-01 DOI: 10.4265/jmc.30.4_125

Qifan Tian, Lisha Yi, Kexin Shen, Kexin Yan, Sheng Guo, Shulan Su, Hui Yan, Jinao Duan, Haifeng Liu

引用次数: 0

Synthesis of the sophoroselipid-copper complex and its bactericidal properties. 槐磷脂-铜配合物的合成及其杀菌性能。

Journal of microorganism control Pub Date : 2025-01-01 DOI: 10.4265/jmc.30.2_41

Yuichi Kumashita, Hiroki Masuda, Taichi Kamo, Reiko Matsumura, Miho Sasaki, Yoshihiko Hirata, Yoshinobu Matsumura

{"title":"Synthesis of the sophoroselipid-copper complex and its bactericidal properties.","authors":"Yuichi Kumashita, Hiroki Masuda, Taichi Kamo, Reiko Matsumura, Miho Sasaki, Yoshihiko Hirata, Yoshinobu Matsumura","doi":"10.4265/jmc.30.2_41","DOIUrl":"https://doi.org/10.4265/jmc.30.2_41","url":null,"abstract":"The copper (II) ion is valuable as an antimicrobial reagent and is highly safe for humans, animals, plants, and the environment. In this study, the effect of sodium sophoroselipid (SL-Na) on the bactericidal activity of CuSO4 was investigated. SL-Na enhanced the bactericidal activity of CuSO4 when incubated with it for 10 min or more at 20℃. Its bactericidal activity is significant against gram-negative bacterial cells. CuSO4 at a concertation of 100 µM, when mixed with 100 µM SL-Na, effectively killed Escherichia coli cells at a rate of more than one order of magnitude higher than that observed without SL-Na after 30 minutes at 20℃. The structural differences between SL-Na, CuSO4 and their mixture were confirmed by ultraviolet visible absorption spectrum analyses, resulting in the absorption of ca. 800 nm derived from copper (II) ions shifting to ca. 680 nm in the mixture. This shift suggests that the acid-form sophoroselipids and copper (II) ions bind weakly to form a complex (SL-Cu complex）. The purified SL-Cu complex also revealed a unique absorption at approximately 1,600 cm-1 using a Fourier transform infrared analysis and demonstrated a higher bactericidal activity than CuSO4. Our results indicate that SL-Cu complex formation enhanced the bactericidal activity of copper (II) ions.","PeriodicalId":73831,"journal":{"name":"Journal of microorganism control","volume":"30 2","pages":"41-48"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144509846","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