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Symptomatic human neurocysticercosis--age, sex and exposure factors relating with disease heterogeneity.

Journal of Neurology

statistics & numerical data, Adolescent, Urban Population, Tomography, X-Ray Computed, radiography, pathology, parasitology, Subarachnoid Space, Sex Factors, Sex Distribution, Rural Population, epidemiology, cerebrospinal fluid, Neurocysticercosis, Middle Aged, Mexico, Male, Leukocyte Count, Humans, Female, Environmental Exposure, Encephalitis, cytology, Cerebrospinal Fluid, Causality, Brain, Age Factors, Age Distribution, Adult

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      Abstract

      To evaluate the relevance of exposure and host biological factors in the heterogeneity of the clinical, radiological and inflammatory picture of neurocysticercosis (NCC). 105 Mexican symptomatic NCC patients confirmed by imaging were studied before they received any specific treatment. The relationships studied were those between a) the patients' characteristics (gender, age and level of exposure), b) the type of clinical picture and c) the radiological and inflammatory characteristics of the disease (number, aspect, localization of the parasites, and CSF leukocyte counts). Seizures were the most frequent symptom and multiple subarachnoid cysticerci the most frequent localization. Symptomatology related to the developmental stage, number and localization of the parasites as well as the CSF leukocyte-counts. The total number of cysticercal lesions and of vesicular cysticerci increased with age,whereas the number of colloidal cysticerci decreased. CSF leukocyte-counts were higher in women than in men. Levels of exposure did not correlate with the clinical and radiological pictures. The variability found in the number, stage, localization and inflammation in the parasite lesions is strongly associated with the heterogeneity of NCC symptoms. The increased number of vesicular cysticerci and the decreased number of degenerating cysticerci with aging, as well as the prominence of inflammation in women suggest that immuno-endocrinological factors may play a role in susceptibility and pathogenesis. The data also show that with increasing age and exposure there is no increment in severity, a suggestion that there might be ways of regulating pathogenicity.

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      10.1007/s00415-004-0437-9
      15258785

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