Microbiology

The USP 36-NF 31 <51> states: “The viable microorganisms used in the test must not bemore than five passages removed from the original ATCC culture. The recommendation of five passages or less from the ATCC reference culture has beenbroadly accepted in the healthcare community and the pharmaceutical and biopharmaceuticalindustries. ATCC agrees with this recommendation. 𝐂𝐞𝐥𝐥 […]

All cultures must be no more than 5 passages removed from the original stock culture. The working culture should not be subcultured more than 5 times from the original reference stock culture. This helps maintain the organism’s original characteristics and reduces the risk of genetic changes, contamination, or loss of important properties.

𝐒𝐮𝐩𝐩𝐥𝐢𝐞𝐫 𝐐𝐮𝐚𝐥𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧Only approved suppliers that meet quality standards are chosen. These suppliers mustprovide media that meet lab specifications and are accompanied by a Certificate of Analysis(CoA). 𝐈𝐧𝐬𝐩𝐞𝐜𝐭𝐢𝐨𝐧 𝐔𝐩𝐨𝐧 𝐀𝐫𝐫𝐢𝐯𝐚𝐥Upon receiving the media, lab personnel conduct a visual inspection. This includes checkingthe packaging for any signs of damage, contamination, or tampering. 𝐒𝐭𝐨𝐫𝐚𝐠𝐞 𝐂𝐨𝐧𝐝𝐢𝐭𝐢𝐨𝐧𝐬Media are stored according

Temperature and humidity are just two factors that need to be upheld to avoid scrutiny,contamination, comfort for personnel, and maintain a positive safety culture. In the U.S the Food and Drug Administration’s regulatory guidelines outline an optimaltemperature for labs as being between 68 °F and 77 °F (20 °C and 25 °C) with humiditylevels somewhere

Bacteria utilize glucose and other carbohydrates through various metabolic pathways. Some pathways are oxidative, while others involve fermentation reactions. The Oxidation-Fermentation (O/F) test, also known as the Ox-Ferm test, is used to determine which metabolic pathway is utilized by a microorganism. This test is commonly used to differentiate between bacterial species, particularly Gram-negative rods, and

When a ray of light passes from a denser medium (such as glass or cedarwood oil) into a rarer medium (such as air), it typically bends away from the normal, a phenomenon known as refraction. However, when cedarwood oil is placed between the microscope slide and the objective lens,light passes through more directly with minimal

Microbiological water analysis estimates the number of bacteria present and identifiesmicroorganisms. The microbial population in a water sample can change over time, which can lead to inaccurate assessments of water quality. Therefore, it is recommended that water samples be transported and analyzed within 8-24hrs.It is dependent on your validation research of a storage water sample

Area of approximately 24 -30 sq. cm shall be used for sampling. Autoclave the template before sampling. Use sanitized SS template for sampling. After each sampling sanitize the template with 70%IPA.

Saline is commonly used for swabs in microbiology and clinical applications because itprovides an isotonic environment that preserves cell integrity 𝐌𝗮𝗶𝗻𝘁𝗮𝗶𝗻𝘀 𝗠𝗼𝗶𝘀𝘁𝘂𝗿𝗲Saline keeps the swab moist, preventing the sample from drying out, which helps inrecovering microorganisms or cells during testing. 𝐏𝗿𝗲𝘀𝗲𝗿𝘃𝗲𝘀 𝗩𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆It doesn’t kill or alter the microorganisms, ensuring an accurate sample for culturing oranalysis.