| Absolute |
| • Histological demonstration of the parasite from biopsy of a brain or spinal cord lesion |
| • Evidence of cystic lesions showing the scolex on neuroimaging studies |
| • Direct visualization of subretinal parasites by fundoscopic examination |
| Major |
| • Evidence of lesions highly suggestive of neurocysticercosis on neuroimaging studies |
| • Positive serum immunoblot for the detection of anticysticercal antibodies |
| • Resolution of intracranial cystic lesions after therapy with albendazole or praziquantel |
| • Spontaneous resolution of small single enhancing lesions |
| Minor |
| • Evidence of lesions compatible with neurocysticercosis on neuroimaging studies |
| • Presence of clinical manifestations suggestive of neurocysticercosis |
| • Positive CSF ELISA for detection of anticysticercal antibodies or cysticercal antigens |
| • Evidence of cysticercosis outside the central nervous system |
| Epidemiological |
| • Individuals coming from or living in an area where cysticercosis is endemic |
| • History of travel to disease-endemic areas |
| • Evidence of a household contact with T. solium infection |
| Degrees of diagnostic certainty |
| Definitive |
| • Presence of one absolute criterion |
| • Presence of two major plus one minor and one epidemiological criteria |
| Probable |
| • Presence of one major plus two minor criteria |
| • Presence of one major plus one minor and one epidemiological criteria |
| • Presence of three minor plus one epidemiological criteria |
