What diseases would be most likely associated with an undercooked hamburger?

Undercooking ground meat, including hamburgers, can increase the risk of foodborne illnesses caused by bacteria that can contaminate the meat during processing and handling. Some diseases that may be associated with eating undercooked hamburgers include:

1. E. coli (Escherichia coli) Infection: E. coli bacteria can cause abdominal cramps, diarrhea, fever, and nausea. Severe infections can lead to complications like hemolytic uremic syndrome (HUS) and kidney failure.

2. Salmonella Infection: Salmonella bacteria can cause salmonellosis, which is characterized by fever, abdominal cramps, diarrhea, nausea, and vomiting. In severe cases, it can cause dehydration and hospitalization.

3. Campylobacteriosis: Campylobacter bacteria can cause fever, abdominal pain, diarrhea, and nausea. In severe cases, it can lead to complications like reactive arthritis and Guillain-Barré syndrome.

4. Yersinia Infection: Yersinia bacteria can cause yersiniosis, leading to abdominal pain, fever, and diarrhea. In some cases, it can also cause skin rashes, joint pain, or swollen lymph nodes.

5. Listeria Infection: Listeria bacteria can cause listeriosis, a serious infection that primarily affects pregnant women, the elderly, and people with weakened immune systems. It can lead to fever, muscle aches, nausea, vomiting, and can be fatal in severe cases.

These diseases can vary in severity depending on the type of bacteria, the amount of consumption, and the individual's overall health. It is essential to follow proper food handling and cooking guidelines, including thoroughly cooking ground meat, to reduce the risk of foodborne illnesses.