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Headache and Cysticercosis in Ecuador, South America

Intractable headaches have been described as the presenting complaint of many patients with T. solium neurocysticercosis. We conducted a house‐to‐house neuroepidemiological survey of 2,723 residents of an Andean community, known to be endemic for this infection. Migraine headaches were confirmed in 187 cases (68.7 per thousand), and tension headaches were diagnosed in 77 cases (28.3 per thousand). Fifty‐seven migraine sufferers accepted computed tomography examination, and in 19 it revealed neurocysticercosis. In 11 out of 52 migraineurs who had their blood drawn, electron immunotransfer blot testing (EITB) was positive for anticysticercal antibodies. In a computer‐generated random sample of this community, 109 headache‐free individuals were examined by CT, and 87 had EITB. Of the 109 subjects examined by CT, 14 were positive for cysticercosis. Of the 87 individuals tested by EITB, 7 were positive. A statistically significant difference between the symptom‐free general population and the migraine patients was obtained for both CT (odds ratio 3.39, P<0.005) and EITB (odds ratio 3.07, P<0.05) diagnosis of neurocysticercosis. Neurocysticercosis appears to be a significant risk factor for the presentation of migraine‐type headaches in areas endemic for T. solium infection.