- What kills the growth of bacteria?
- What causes microbial growth?
- What are the 6 conditions that affect the growth of microorganisms?
- What causes bacteria to grow in food?
- How can you control the growth of bacteria?
- What are two ways of killing bacteria?
- What are the 6 conditions necessary for bacteria to grow?
- What are the 4 phases of bacterial growth?
- Which food is at temperature that allows bacteria to grow?
- What is a factor that affects the growth of bacteria in food?
- How can we prevent the growth of microorganisms in food?
What kills the growth of bacteria?
Boiling: Heat to 100oC or more at sea level.
Kills vegetative forms of bacterial pathogens, almost all viruses, and fungi and their spores within 10 minutes or less.
Endospores and some viruses are not destroyed this quickly.
However brief boiling will kill most pathogens..
What causes microbial growth?
Microbial growth is affected by temperature, water activity (relative humidity of the meat), pH, and the concentration of nutrients.
What are the 6 conditions that affect the growth of microorganisms?
Terms in this set (6)Reservoir. Environment where most microbes grow.Food. Water and nourishment.Oxygen. Most need oxygen to survive.Darkness. Warm and dark environments is needed.Temperature. Most grow best at body temperature.Moisture. Grow well in moist places.
What causes bacteria to grow in food?
To survive and reproduce, bacteria need time and the right conditions: food, moisture, and a warm temperature. Most pathogens grow rapidly at temperatures above 40°F. The ideal temperature for bacterial growth is between 40 and 140°F – what FSIS calls the “Danger Zone.”
How can you control the growth of bacteria?
Control of growth usually involves the use of physical or chemical agents which either kill or prevent the growth of microorganisms. Agents which kill cells are called cidal agents; agents which inhibit the growth of cells (without killing them) are referred to as static agents.
What are two ways of killing bacteria?
How to kill Bacteria?How to kill Bacteria? … The process of killing bacteria and other micro-organisms either in a vegetative or a spore state is known as sterilization. … Sterilization or bacterial killing is brought about by many methods, such as physical methods, irradiation and chemical agents or disinfectants.More items…•
What are the 6 conditions necessary for bacteria to grow?
What bacteria need to grow and multiplyFood (nutrients)Water (moisture)Proper temperature.Time.Air, no air, minimal air.Proper acidity (pH)Salt levels.
What are the 4 phases of bacterial growth?
It has been determined that in a closed system or batch culture (no food added, no wastes removed) bacteria will grow in a predictable pattern, resulting in a growth curve composed of four distinct phases of growth: the lag phase, the exponential or log phase, the stationary phase, and the death or decline phase.
Which food is at temperature that allows bacteria to grow?
Bacteria grow most rapidly in the range of temperatures between 40 °F and 140 °F, doubling in number in as little as 20 minutes. This range of temperatures is often called the “Danger Zone.” Never leave food out of refrigeration over 2 hours.
What is a factor that affects the growth of bacteria in food?
The most important factors that affect microbial growth in foods can be summarized in the following categories: (i) factors related to the food itself, the “intrinsic factors,” which include nutrient content, water activity, pH value, redox potential, and the presence of antimicrobial substances and mechanical barriers …
How can we prevent the growth of microorganisms in food?
Drying is one of the most ancient food preservation techniques, which reduces water activity sufficiently to prevent bacterial growth. Refrigeration preserves food by slowing down the growth and reproduction of microorganisms and the action of enzymes which cause food to rot.