MIC 301 Lecture Notes - Lecture 8: Thermal Death Time, Mercury-Vapor Lamp, Germicidal Lamp

• School: University at Buffalo
• Department: Microbiology And Immunology
• Course: MIC 301
• Professor: Dombroski Darlene

Document Summary

Aseptic a procedure or environment that limits contamination by pathogens. Disinfection the destruction and removal of most pathogenic microbes from inanimate objects. All microbes are not removed remaining are nonpathogens and spores of pathogens. Antiseptic chemicals with low human toxicity that destroy microorganisms capable of causing contamination or disease. Degerming removal of microbes from surface by scrubbing. Sanitization disinfection of utensils and places used by the public which decreases the number of pathogenic microbes. Pasteurization use of heat to kill pathogens and decrease the number of spoilage microorganisms in beverages and food. Bacteriostatic an agent that inhibits bacterial growth. Factors affecting sterilization/disinfection action: time, temperature, ph, number of microorganisms, types of microorganisms, presence of extraneous matter, proper exposure, concentration of disinfectant or sterilant. Action of antimicrobial agents: alteration of cell walls and membranes, damage to proteins and nucleic acids. Heat treatment procedures: dry heat, moist heat, boiling water, pasteurization flash pasteurization focus on whether it kills spores or not.