Forms of Contamination


How Contamination Happens ????

Contamination can come from anywhere! Literally you can get it from the air we breath to the things we eat. In the food industry contamination can be caused on purpose but most happen on accident.


The thing that contaminates food most of the time is bacteria. Most bacteria is harmless but in some situations it can cause some serious problems. For bacteria to grow they need 6 essential conditions.

  • Food - Like humans, Bacteria need food to survive.
  • Acidity - Places with low acidity are a perfect breeding ground for bacteria
  • Temperature - Bacteria grows rapidly between 41 and 135 degrees. This is known as the danger zone.
  • Time - The longer bacteria is in the danger zone, the more the bacteria grow to unsafe levels.
  • Oxygen - Most bacteria need oxygen to grow but this is not always the case.
  • Moisture - Bacteria like places with lots of moisture.

You can remember these six conditions by remembering FAT TOM.

FDA'S Prime Suspects

The FDA have identified three in particular that are highly contagious and can cause you to be ill.
  • Salmonella Typhi
  • Shigella Spp.
  • Enterohemorrhagic and shiga toxin-producing escherihia coli (AKA E-Coli)

Salmonella Typhi

Salmonella lives in humans. People who have had typhoid fever carry this bacteria. Mostly found in poultry. An easy way to prevent this is by cooking food to correct temperature



This bacteria is found in feces. You can easily get contaminated by eating or drinking contaminated foods Flies are huge carriers of this bacteria.



This bacteria can be found in cow intestines. Can contaminate meat during slaughtering. Purchasing from reliable sources helps reduces the risk of contamination.


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Unlike bacteria, viruses can not be killed by cooking the food properly. While viruses do not grown in food, they can be transferred through food. The best way to prevent any virus is by practicing great personal hygiene when handling food.

FDA'S Prime Suspects

The FDA has identified two viruses that are highly contagious and can cause severe illness.

  • Hepatitis A
  • Norovirus

Hepatitis A

Mainly found in feces of things infected by it. Feces that gets into our water system contaminates it cause other things like food and water to get contaminated. Fish and shellfish who swim in these contaminated waters acquire this virus. Jauindice is a indicator of this virus.


This virus could really affect me since I'm a seafood lover. Stating that you can infer that this virus is mainly found in seafood. Like Hep. A, fishes and seafood swimming in contaminated water acquire this virus. This virus usually causes diarrhea and vomiting. The symptoms usually don't take long to show up.
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Parasites require a host to live. These contaminant most likely comes from seafood, wild game, and food processed with contaminated water. Parasites can easily be killed by cooking food to correct minimal temperature or simply avoid them by purchasing food from approved, reputable suppliers.


In my opinion the least harmless of the four but nevertheless something you shouldn't be worried about. Fungi include yeasts, molds, and mushrooms. As you might know we can eat mushrooms, well the good kind. There are some mushrooms that will give you hallucinations and some that will kill you. All food molds up after some time. All food that has mold on it must be thrown out unless mold is put there on purpose like blue cheese.


1. What is a good way to prevent viruses?

A. Not washing your hands at all.

B. Washing your hands.

2. What is FAT TOM used to memorize?

A. The conditions needed for bacteria to survive.

B. To remind people that Tom is fat

3. Who are the prime suspects viruses recognized by the FDA.


B. Hepatitis A and Nora Virus