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The ideal temperature for bacteria to multiply vary with different species they can be divided in following types:
ü Psychrophiles: they love cool environment and grow in temp below20o
ü Mesophiles: they can grow normally in temp range between35 to45
ü Thermophiles: they are able to grow at temprature higher then80o
ü And most bacteria develop rapidly between20 and40°C.
Temperature requirement depends upon the type of bacteria whether psychrophilic, mesophilic or thermophilic. Psychrophiles prefer low temperature; optimum temperature may be around15-20 degree celsius, eg. Pseudomonas. Most of the pathogens are mesophilic in nature; optimum temperature may be around20-45 degree celsius. Thermophiles prefer a high temperature, may be45-65 degree celsius, include spore formers. The method to promote/eliminate bacterial growth has to be decided based on the specific temperature requirement and related factors of that organism.
35 to38 degree celsuis but dont forget yhat humidity is a major factor which increases the multiplications
Simple Answer :Best is our body temperature37 Deg C
Food poisoning bacteria will multiply within a certain range of temperatures. This range of temperatures is called the danger zone and high-risk foods should spend as short a time as possible at these temperatures. When the temperature falls below5°C, such as in a refrigerator, the multiplication of bacteria will slow down or stop. At18°C bacteria will multiply, but this is not the ideal temperature for multiplication. The ideal temperature is higher than this, but this is still in the danger zone.37°C is the temperature at which harmful bacteria will multiply at the fastest rate. This is the average temperature of the human body. Cooking food at70°C or above for sufficient time will kill most harmful bacteria.
5°c to63°c is the danger zone temperature at which the multiplication of bacteria is very fast
The best temperature for multiplication of food poisoning bacteria aroun37C they can multiply quickly between20 C and 50C
The optimal temperature for the proliferation of most microorganisms is from14°C to40°C, though some microbes will grow below0°C, and other genera will grow at temperature up to and exceeding100°C
Thermophiles (high-temperature-loving microorganism) with growth optima at temperaure above45°C. Example are
Bacillus sterothermophilus Bacillus coagulant
Lacto bacillus thermophilus
Mesophiles (medium-temperature-loving microorganism) with growth optima between20°C and45°C.Example are most
Lactobacilla, Staphlococci
Psychrotrophic (Cold-temperature- tolerant microorganism) with tolerate and thriveat temperature blew20°C. Example are
Pseudomonas, Moroxella, Acineto bacter
Conditions:Harmful bacteria that cause food poisoning will multiply in particular conditions. Bacteria require certain conditions in order to grow and reproduce. Harmful bacteria require food, they need a supply of nutrients and usually find this in moist, protein-rich foods. They need moisture, without moisture, the growth of bacteria slows down and may stop. Dry foods do not support the growth of bacteria. They need warmth as food kept at the wrong temperature will allow harmful bacteria to multiply. Bacteria also require time to multiply. Food poisoning bacteria, under optimum conditions, can quickly multiply to dangerous levels.
Moisture:Bacteria need moisture in order to stay alive. This is why they cannot multiply in dried foods such as powdered milk, or uncooked pasta. However, as soon as liquid is added to dried food, the reconstituted products are likely to provide conditions, which are ideal for bacterial growth.
Danger zone:Food poisoning bacteria will multiply within a certain range of temperatures. This range of temperatures is called the danger zone and high-risk foods should spend as short a time as possible at these temperatures. When the temperature falls below5°C, such as in a refrigerator, the multiplication of bacteria will slow down or stop. At18°C bacteria will multiply, but this is not the ideal temperature for multiplication. The ideal temperature is higher than this, but this is still in the danger zone.37°C is the temperature at which harmful bacteria will multiply at the fastest rate. This is the average temperature of the human body. Cooking food at70°C or above for sufficient time will kill most harmful bacteria.
Binary fission:Harmful bacteria multiply by splitting in two. This process is called binary fission. Most bacteria will multiply every10 to20 minutes. This means that after10 to20 minutes, one single bacterium will become two. After another10 to20 minutes, these two bacteria will become four. After a further10 to20 minutes, the four bacteria will have multiplied to become eight, and so on. It will take only a few hours for one bacterium to multiply to over10 million bacteria.
High-risk foods:Some foods are called ‘high risk foods’ because it is easy for harmful bacteria to multiply in them, even after they have been cooked. Harmful bacteria that cause food poisoning can grow and reproduce on a range of foods. They are most likely to multiply on food that is both moist and high in protein i.e. poultry, eggs, meat products, fish, milk and milk products, dairy products, cooked rice and pasta and meat.
Best our body temperature37C
there is no specific ideal temperature to bacteria but threre is a rang of temperature and this is based on the type of baceria
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