Table of Contents
- 1 What are some ways to control bacterial growth?
- 2 What are the 3 requirements for bacterial growth?
- 3 What are two commonly used methods of using temperature to control microbial growth?
- 4 What are the three key factors that are needed for bacteria to survive and multiply?
- 5 What prevents the growth of bacteria on food?
- 6 What are the main growth requirements for bacteria?
- 7 Which is the best way to control microbial growth?
- 8 Which is the best way to kill microbes?
- 9 How is heat used to control the growth of microbes?
What are some ways to control bacterial growth?
The major groups are disinfectants, antiseptics, and antibiotics. Antibacterials are divided into two broad groups according to their biological effect on microorganisms: bactericidal agents kill bacteria, and bacteriostatic agents slow down or stall bacterial growth.
What are the 3 requirements for bacterial growth?
A Comfortable Bacterial Home The three fundamental requirements related to bacterial life are temperature, oxygen and food. It is not possible, however, to identify specific environmental conditions that favor general bacterial growth because bacteria are a vastly diverse group of organisms.
What are the methods of microbial control?
Microorganisms are controlled by means of physical agents and chemical agents. Physical agents include such methods of control as high or low temperature, desiccation, osmotic pressure, radiation, and filtration.
What are two commonly used methods of using temperature to control microbial growth?
Refrigeration and Freezing This temperature range inhibits microbial metabolism, slowing the growth of microorganisms significantly and helping preserve refrigerated products such as foods or medical supplies. Certain types of laboratory cultures can be preserved by refrigeration for later use.
What are the three key factors that are needed for bacteria to survive and multiply?
Conditions needed for bacterial growth
- Moisture – Bacteria need moisture in order to grow.
- Food – Food provides energy and nutrients for bacteria to grow.
- Time – If provided with the optimum conditions for growth, bacteria can multiply to millions over a small period of time via binary fission .
What is control of microbial growth?
Control of microbial growth means to inhibit or prevent growth of microorganisms. Control of growth usually involves the use of physical or chemical agents which either kill or prevent the growth of microorganisms.
What prevents the growth of bacteria on food?
Bacterial growth slows down or stops in food that is kept at temperatures colder than 5°C or hotter than 63°C. Most bacteria can survive cold temperatures though, (in a fridge or freezer), and resume multiplication when they are back in the Danger Zone.
What are the main growth requirements for bacteria?
What are the physical methods used to control microbial growth?
Which is the best way to control microbial growth?
Phsysical Methods of Microbial Control: Dry Heat: Kills by oxidation effects. u Direct Flaming:Used to sterilize inoculating loops and needles. Heat metal until it has a red glow. u Incineration: Effective way to sterilize disposable items (paper cups, dressings) and biological waste. u Hot Air Sterilization: Place objects in an oven. Require 2
Which is the best way to kill microbes?
Spores are killed by exposure to moist heat at 121°C for 10-30 minutes. Dry heat kills micro-organism by oxidative destruction of the cell constituents. Spores are killed by exposure to dry heat at 160°C for 1-2 hours. Control of Microbial Growth: Method # 2.
What are the different types of microbial control?
TYPES OF MICROBIAL CONTROL. Sterilization (or sterilisation ) is a term referring to any process that eliminates (removes) or kills all forms of microbial life, including transmissible agents (such as fungi, bacteria, viruses, and spore forms) present on a surface, contained in a fluid, in medication, or in a compound.
How is heat used to control the growth of microbes?
But, there are some other uses of heat to control growth of microbes although it may not kill all organisms present. Boiling: 100 o for 30 minutes (more time at high altitude). Kills everything except some endospores. It also inactivates viruses.