Domanda del libro di testo
Thermal death point is not considered an accurate measure of the effectiveness of heat sterilization. List three factors that can alter thermal death point.
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Ch. 7 - The Control of Microbial Growth
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398
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TOC.tableOfContents
- Ch. 1 - The Microbial World and You18
- Ch. 2 - Chemical Principles20
- Ch. 3 - Observing Microorganisms Through a Microscope18
- Ch. 7 - The Control of Microbial Growth20
- Ch. 9 - Biotechnology & DNA Technology20
- Ch. 10 - Classification of Microorganisms15
- Ch. 11 - The Prokaryotes: Domains Bacteria and Archaea14
- Ch. 12 - The Eukaryotes: Fungi, Algae, Protozoa, and Helminths17
- Ch. 13 - Viruses, Viroids, and Prions20
- Ch. 14 - Principles of Disease and Epidemiology21
- Ch. 15 - Microbial Mechanisms of Pathogenicity19
- Ch. 16 - Innate Immunity: Nonspecific Defenses of the Host20
- Ch. 17 - Adaptive Immunity: Specific Defenses of the Host20
- Ch. 18 - Practical Applications of Immunology20
- Ch. 19 - Disorders Associated with the Immune System19
- Ch. 20 - Antimicrobial Drugs19
- Ch. 21 - Microbial Diseases of the Skin and Eyes21
- Ch. 22 - Microbial Diseases of the Nervous System19
- Ch. 23 - Microbial Diseases of the Cardiovascular and Lymphatic Systems20
- Ch. 24 - Microbial Diseases of the Respiratory System20
- Ch. 25 - Microbial Diseases of the Digestive System20
- Ch. 26 - Microbial Diseases of the Urinary and Reproductive Systems19
- Ch. 27 - Environmental Microbiology20
- Ch. 28 - Applied and Industrial Microbiology19
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Capitolo 4, Problema 2
If pasteurization does not achieve sterilization, why is pasteurization used to treat food?
Guida verificata passo dopo passo1
Understand the difference between sterilization and pasteurization: Sterilization aims to kill all microorganisms, including spores, while pasteurization targets reducing the number of pathogenic and spoilage microorganisms to safe levels without killing all microbes.
Recognize that pasteurization is used because it effectively reduces harmful bacteria that can cause disease or spoilage, thereby making food safer to consume and extending its shelf life.
Consider that pasteurization uses milder heat treatment compared to sterilization, which helps preserve the taste, texture, and nutritional value of food better than sterilization would.
Note that sterilization often requires higher temperatures or longer times that can negatively affect food quality, making pasteurization a practical compromise between safety and food quality.
Conclude that pasteurization is used because it balances microbial safety and food quality, reducing pathogens to safe levels without the harsher effects of sterilization.
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Pasteurization
Pasteurization is a heat treatment process that reduces the number of pathogenic and spoilage microorganisms in food, especially liquids like milk, without achieving complete sterilization. It involves heating the food to a specific temperature for a set time to kill most harmful bacteria while preserving taste and nutritional value.
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03:50
Pasteur's Experiments on Spontaneous Generation
Sterilization vs. Pasteurization
Sterilization is the complete elimination of all microorganisms, including spores, often achieved by high heat or chemical methods. Pasteurization, in contrast, only reduces microbial load to safe levels but does not kill all microbes or spores, making it less harsh and more suitable for preserving food quality.
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05:58Pasteur’s Swan-Neck Experiment
Food Safety and Shelf Life
Pasteurization improves food safety by significantly lowering harmful bacteria, reducing the risk of foodborne illness. It also extends shelf life by slowing microbial spoilage, making food safer and more durable without the negative effects of sterilization on flavor and texture.
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05:203 Domains of Life
Pratica correlata
Domanda del libro di testo
Which of the following does not kill endospores?
a. Autoclaving
b. Incineration
c. Hot-air sterilization
d. Pasteurization
e. All of the above kill endospores
1086
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Domanda del libro di testo
Which of the following is most effective for sterilizing mattresses and plastic Petri dishes?
a. Chlorine
b. Ethylene oxide
c. Glutaraldehyde
d. Autoclaving
e. Nonionizing radiation
1070
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Domanda del libro di testo
Which of these disinfectants does not act by disrupting the plasma membrane?
a. Phenolics
b. Phenol
c. Quats
d. Halogens
e. Biguanides
1287
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Domanda del libro di testo
The thermal death time for a suspension of Bacillus subtilis endospores is in dry heat and less than in an autoclave. Which type of heat is more effective? Why?
1208
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