衛生微生物研究センター List of Products and Services

This is the testing method conducted with reference to the "Testing Method for Antibacterial Performance of Water-Absorbent Resins" by the Japan Hygiene Materials Industry Association and the Water-Absorbent Resin Industry Association.

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This is a test to investigate the sterilization effect when ultraviolet light is irradiated using ultraviolet irradiation equipment.

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This is a test to investigate the disinfection effect when wiping floors and other surfaces using mops or robotic vacuum cleaners. The number of viable bacteria per unit area before and after wiping is measured and evaluated.

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This is a testing method used to investigate the sterilization and antibacterial effects of liquid and paste samples.

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We offer training sessions to deepen knowledge about microbiological testing and to conduct tests within our company. In general training sessions, content is often provided based on a fixed program, which may not align with the specific needs or issues of a company. Our company aims for more effective learning and skill enhancement by providing customized programs tailored to requests. This allows us to focus on specific problems or challenges within the company and work on solutions or optimal approaches to address them.

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Our company offers not only contract and implementation of microbial testing but also services for advice and support regarding questions, troubles, and concerns related to microorganisms.

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At our center, we not only conduct tests as specified by JIS and other regulations, but we also propose testing methods that suit the purpose of the tests. We capture the entire problem for problem-solving and provide practical advice. 【Business Activities】 ■ Isolation and identification of molds, yeasts, and bacteria ■ Genetic analysis of microorganisms ■ Microbial limit testing ■ Viable count testing ■ Airborne mold analysis testing ■ Preservation efficacy testing of cosmetics and pharmaceuticals (challenge tests) ■ Antimicrobial and antifungal testing ■ Minimum inhibitory concentration (MIC) measurement testing ■ Mold resistance testing ■ Mold occurrence confirmation testing *For more details, please contact us or download the catalog.

• Public Testing/Laboratory

This is a test to investigate whether microorganisms such as mold occur during the production, distribution, and storage of various industrial products. A similar test is the mold resistance test.

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Mold resistance testing is an examination that investigates the resistance of various industrial products and materials to mold (the difficulty of mold growth). It allows for the confirmation of the effectiveness of preservative treatments on industrial products and materials. A similar test is the mold occurrence confirmation test.

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The minimum inhibitory concentration (MIC) measurement test is a test that measures the minimum concentration that inhibits the growth of test bacteria for antibacterial and antifungal agents. There are liquid medium methods and agar medium methods, which are used for selecting effective agents, among other purposes.

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This is a test to examine the presence or absence of antibacterial properties in textile products from the halo (growth inhibition zone) around the sample. It is conducted for screening purposes to determine whether there is an effect on suppressing bacterial growth. It is also possible to conduct the test using a liquid. In that case, it is common to impregnate the liquid into a paper disk for use.

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This is the testing method of the Detergent and Soap Fair Trade Council. It is a method that measures the number of viable bacteria on the test piece after exposing it to bacteria and the sample, in order to investigate the antibacterial effect.

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This is the testing method of the Detergent and Soap Fair Trade Council. After bringing the bacteria and the sample into contact through the test piece, the number of viable bacteria on the test piece is measured to investigate the disinfection effect.

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This is the disinfection performance testing method for wet wipes by the Japan Hygiene Materials Industry Association.

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This is a method for anti-fungal testing of anti-fungal treated products containing photocatalysts. It is applicable to flat materials.

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This is the antibacterial testing method for antibacterial processed products containing photocatalysts. It can be applied to both flat materials and fibrous materials. There are two types of testing methods: the film adhesion method and the glass adhesion method. The film adhesion method is applied to flat materials, while the glass adhesion method is applied to fibrous materials.

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This is an antibacterial testing method used for soft foam materials with a continuous bubble structure (such as sponge products). In addition to this standard, there is also the SIAA shake method, which can be applied to specimens with similar properties.

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This is a testing standard from AATCC (American Association of Textile Chemists and Colorists). It quantitatively examines the antibacterial effect of treated textile products on the growth of bacteria. Please feel free to inquire about other AATCC standards (such as TM147).

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This is a test to compare the inhibitory and suppressive effects on mold growth between antimicrobial-treated samples and untreated samples by inoculating the test samples with mold spore suspension, culturing them, and measuring the ATP levels before and after culturing. This can be conducted on absorbent samples such as fiber products and paper. ISO 13629-1 describes a similar testing method. *ATP is a substance synthesized by living bacteria. Arrangements for the testing method are also possible. If you would like to discuss changes to testing conditions, bacterial species, or sample characteristics, please feel free to consult with us.

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This is a testing method to compare the degree of bacterial growth between antimicrobial-treated samples and untreated samples. It can be conducted on absorbent materials such as textile products and paper.

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The shake method is a suitable antibacterial testing method for samples that have a non-smooth special shape or are small items. In cases where flat test pieces (such as 5 cm x 5 cm) can be produced, methods like JIS Z 2801 are used, and in principle, the shake method is not employed. Additionally, for fibrous samples such as cloth or paper, methods like JIS L 1902 are used.

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"JIS Z 2801:2012 Antimicrobial Products - Test Methods for Antimicrobial Activity" is a testing method commonly used for flat test specimens. It compares the degree of bacterial growth between antimicrobial-treated specimens and untreated specimens. ISO 22196 is a similar testing method.

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This is the most commonly used testing method for investigating the disinfection and antibacterial effects of liquid and paste samples. It allows for quantitative confirmation of the extent to which bacteria are killed within a specified time when the sample comes into contact with the bacteria. It is often used to examine the fundamental disinfection effects of the sample, regardless of how the sample is used.

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Antibacterial and antifungal tests are examinations that investigate the antibacterial properties of various industrial products or materials against bacteria, yeasts, and molds. Broadly speaking, there are quantitative tests and qualitative tests.

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The preservative efficacy test is a test to confirm the preservative effect of cosmetics and pharmaceuticals. Various standard tests are conducted according to the Japanese Pharmacopoeia (JP), United States Pharmacopoeia (USP), European Pharmacopoeia (EP), Chinese Pharmacopoeia (PPRC), ISO 11930, and others. Additionally, we propose testing methods tailored to the type of product, its intended use, and application methods.

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This is a test to investigate the number and types of airborne mold in indoor air. Based on the test results, we provide information on the hygienic evaluation of airborne mold and countermeasures. *Tests on airborne bacteria are also possible, in addition to airborne mold.*

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This is a test to measure the number of viable bacteria, yeast, or mold per 1g or 1ml of the sample. It provides information on contamination levels and measures to address them based on the test results.

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The microbiological limit test is conducted on non-sterile products (such as pharmaceuticals and cosmetics). It includes the viable count test (which examines the number of viable microorganisms present in the product) and the specific microorganism test (which checks for the presence of specific microorganisms in the product).

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This is a test to extract DNA from a sample (culture), determine part of the nucleotide sequence of the 16S rRNA gene region (bacteria) or ITS region (fungi), and obtain information to identify the species of microorganisms.

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This is a test to isolate and identify microorganisms such as molds, bacteria, and yeasts that have developed in food and various industrial products. Based on the test results, information is provided regarding the ecological distribution, physiological characteristics, harmfulness, and preventive measures against reoccurrence of the contaminating microorganisms. It is also possible to examine whether or not the sample contains microorganisms (molds, yeasts, or bacteria) without identifying them.

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