Casu marzu is a traditional Sardinian cheese made from sheep's milk and is known for containing live insect larvae (maggots). These maggots aid in the fermentation process, giving the cheese a unique flavor and texture. Due to health concerns, commercial sales of casu marzu are illegal in Italy and several other countries, including the United States.
Casu marzu is traditionally from Sardinia, an island in the Mediterranean Sea that is part of Italy.
Casu marzu is considered dangerous because it contains live maggots of the cheese fly, Piophila casei. These maggots can survive in the human stomach after consumption, potentially causing intestinal myiasis, a parasitic infection. This can lead to abdominal pain, vomiting, and diarrhea. Additionally, the cheese is produced in an uncontrolled environment, which may introduce harmful microorganisms that could cause infections. Due to these risks, Italian authorities have banned the sale of this cheese, deeming it dangerous.