Angiostrongyliasis is a parasitic infection caused by the roundworm Angiostrongylus cantonensis. It is also known as rat lungworm and is most commonly found in rodents, such as rats, and other animals, such as snails and slugs. Humans can become infected by eating raw or undercooked seafood, or by eating raw produce that has been contaminated with the larvae of the parasite. Symptoms of angiostrongyliasis can include fever, headache, nausea, vomiting, and abdominal pain. In severe cases, the infection can cause neurological symptoms, such as meningitis, seizures, and paralysis. Treatment typically involves medications to reduce inflammation and pain, as well as supportive care.