Lots of points tell how you can catch these diseases.
undercooked ground beef
raw poultry and eggs
improperly canned foods/bulging cans
unpasteurized milk/contaminated water
feces/poop and not washing hands frequently
time/temperature abused foods
human mucous from sneezing and coughing
infected handler

Hey!

Under-cooked Ground Beef - a few days after eating this you will start to get symptoms of E. coli.

Raw Poultry and Egg - raw poultry and eggs contain something called salmonella. Salmonella is a bacteria from contaminated food that causes an infected in the intestines that can later cause bacteria to form in the blood stream.

Improperly Canned Foods/Bulging Cans - Other known as botulism, a can that is dented or improperly canned can grow a germ called "Clostridium botulinum". This germ is formed from the soil and can grow in improperly canned foods. This germ can be deadly.

Unpasteurized Milk/Contaminated Water - and contaminated water can contain bacteria that can cause E. coli and salmonella.

Feces/Poop and Not Washing Hands Frequently - Not washing your hands after using the bathroom can cause all sorts of illnesses like E. coli and salmonella.

Time/Temperature Abused Foods - These foods can cause food-borne illness.

Human Mucous From Sneezing and Coughing - typically this means you have a cold or the flu but not washing your hands after sneezing and not covering you moth when your coughing can lead you to affecting other people with the same illness.

Infected handler - countless of illnesses from food producers that may not wear gloves, don't cover there moth while coughing, and has the cold or flu.

Hope This Helped! Good Luck!