Nematodes and other nasty paracites, bacteria too if it's cut or ground.
The traditional answer to this is Trichinella, an internal parasite that can cause severe organ and muscular disease in humans. However, in most first world countries (western Europe, Canada, US, Australia, etc.), this parasite is no longer a concern as food safety and meat inspection services have controlled or eradicated this parasite.In developing and undeveloped countries, Trichinella is still a major concern that causes disease annually.
Whether from pets or undercooked meat (especially pork), these bacteria almost always enter the human body through the mouth (oral transmission).
Look at the nutrition labels and ingredients to see if it contains pork.
Cysticercosis, or neurocysticercosis, is the most common parasitic infestation of the central nervous system worldwide.[1] Humans develop cysticercosis when they ingest eggs or larvae of the tapeworm Taenia solium. The eggs and larvae are usually found in fecally-contaminated water and undercooked pork.
Listeriosis outbreaks in the United States since the 1980s have been linked to cole slaw, milk, Mexican-style cheese, undercooked hot dogs, undercooked chicken, and delicatessen foods.
For many years, market pork was fed "slop" besides a conventional pork production diet (corn and rye), and there was a very real chance that the meat contained a parasite that could cause a disease known as trichinosis. Only thorough cooking could destroy it. Today, there is almost nil chance of contracting trichinosis from pork, but partially from habit, and partially because most people do not like the taste of undercooked pork, it is still widely cooked to the "fully white" stage. There is also the same risk of contracting salmonella from pork that there is from any other processed food product that has been improperly handled, but no more or less. The most common cause of salmonella poisoning is probably poorly handled eggs.
raw or undercooked pork
It is safe to eat if it does not contain uncooked/undercooked eggs (whites or yolks) and has not gone bad/stale/off.
Liver flukes can be caused by eating undercooked pork products. Undercooked pork contains a bacteria that can cause liver flukes.
magnets live in pork if uncooked
Food poisoning and tape worms.
Trichinosis...
Trichinosis
No. An uncooked or undercooked burger contains microorganisms, but the burger itself is made from cattle, which are definitely not microorganisms.
Uncooked/undercooked poultry and eggs, unpasterized milk, contaminated water, and from reptiles whom most likely carry it.
It claims the apparition is the result of some undercooked potato or some uncooked meat
Trichinellosis, also called trichinosis, is a disease that people can get by eating raw or undercooked meat from animals infected with the microscopic parasite Trichinella.