They need:
Temperature: They need temperature because they need to survive they grow best between 4ºC and 60ºC but to multiply enough times to cause illness they grow at the temperature 60ºC and 74ºC. In order to kill the pathogenic bacteria then
Time: They need enough time to multiply, The bacteria will reach dangerous levels very quickly if they have perfect conditions this will increase the chance of the growth of bacteria rapidly. In perfect conditions the bacteria will grow every 20 minutes.
Food: They need an energy source to grow. They get carbohydrates and proteins. E.g. from …show more content…
e.g. Sweat- They can grow perfectly in this condition
Explain how infection is spread by: Contact- infection can be spread by contact of people for example when someone doesn't wash their hands after doing something they can easily pass it on to the next person they touch. It can easily be passed on from children when they touch another child's infected area, this is passed on very quickly. Droplets- Infection can be spread by droplets easily because germs that cause colds are found in the saliva and secretions of the nose, meaning that when people cough, sneeze or have runny noses can spread infection really quickly. Flies- Infection is spread by flies because they land on any type of excrement, they then regurgitate, they then land on someone's food and stamp it into the product without the person knowing, they then eat the food and become unwell. Hands- Infection can be spread by people not washing their hands after doing something that makes them contaminated. If they don't wash all the germs off then they will easily pass it on to someone