1) Salmonella - poultry such as chicken and turkey are especially likely to carry this bacteria. Symptoms include diarrhea, fever and stomach cramps, and usually start 6 hours to 6 days after infection and can last 4 to 7 days. Adequate cooking of meat usually kills Salmonella bacteria, however humans can catch it from vegetables, fruit and dairy that come into contact with it.
2) Norovirus - Norovirus is a group of viruses that can cause an infection of the gut in humans, and is commonly caught from other people who are carrying the virus on their hands and transmitted on objects. The virus is expelled from the body when someone goes to the toilet, which is why hand hygiene is a key in stopping the spread. Symptoms include diarrhea, nausea, headache and fever.
3) Campylobacter - People can catch it by eating undercooked poultry or eating something that has come into contact with it. Symptoms usually last a week and include diarrhea, nausea, stomach ache and in severe cases temporary paralysis and arthritis. Pets infected with the bacteria can also pass it on to humans.
4) E. Coli - This bacteria is found in the environment, foods and intestines of humans and animals. Some kinds of E. coli can cause diarrhea, while others cause urinary tract infections, respiratory illness and pneumonia. Good hand and food hygiene should kill the bacteria before it is ingested and causes harm.
5) Listeria - Less common than the other germs, Listeria can cause serious illness and is caught by consuming contaminated food. It primarily affects pregnant women, newborns, older adults, and people with weakened immune systems. Symptoms are similar to a mild flu, with diarrhea and sickness for most however for unborn babies it can be fatal. Once infected it can take anywhere between 1 to 90 days for the illness to develop.