Nervous system parasitic infection refers to damage to the brain, spinal cord and peripheral nerves caused by parasitic pathogens. Usually divided into two major categories: parasitic infections of the central nervous system and parasitic infections of the peripheral nervous system.

The most common symptoms of brain parasites are headaches and epileptic seizures. In addition, if the parasites are in important functional areas, they can also cause lesions in the organs controlled by the functional areas.

An encephalopathy caused by the invasion of parasitic worms, eggs or larvae into the brain, causing allergic inflammation, formation of internal buds or obstruction of cerebral blood vessels. He was originally a parasitic disease patient and developed symptoms of encephalopathy during the course of the disease. There are: ① Cerebral fluke disease, in which the eggs enter the brain along with the blood. ② Neurocysticercosis: caused by cysticerci, the larvae of the pig tapeworm, parasitizing in the brain. ③ Intracranial hydatid disease is caused by canine tapeworm larvae and larvae parasitizing in the skull. ④ Cerebral paragonimiasis is caused by adult worms invading the brain and migrating within the brain. ⑤Cerebral hernia, caused by hernia protozoa blocking the capillaries in the brain. Clinical manifestations: It can be acute meningoencephalitis, localized epilepsy or intracranial hypertension with localization signs, or mental decline or mental disorder. Diagnosis is based on the history of infection in the epidemic area and the history of extracerebral parasitic disease, increased acidic cells in blood and cerebrospinal fluid, positive intradermal antigen test and serum complement fixation test, and lesions can be found on cerebral angiography or brain CT. Treat the parasitic disease according to the disease, and perform surgery if necessary.

As for the infection period of different types of parasites infecting the brain, please read Parasitology.